Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Electret filter element and method for producing thereof

An electret and filter material technology, applied in separation methods, methods for reacting gaseous media with gaseous media, chemical instruments and methods, etc., can solve problems such as large equipment costs and increase costs, and achieve energy saving and strong charging. Effect

Active Publication Date: 2011-08-17
CARL FREUDENBERG KG
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in large equipment outlays and a significant increase in costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electret filter element and method for producing thereof
  • Electret filter element and method for producing thereof
  • Electret filter element and method for producing thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] figure 1 A spray device 1 configured as a nozzle is shown in side view. A conical spray 3 is sprayed from the tip 2 of the spray device 1 , and the spray 3 is composed of individual droplets 4 . Droplet 4 is in a charged state. Charging is effected by an electric field formed between the disintegrated droplet 4 a and a ring electrode 5 .

[0046] In the spray 3, 60% or more of the charged droplets 4 held therein have charges of the same polarity. In the spray 3, the charge polarity of the droplets 4 held therein is independent of the droplet size.

[0047] figure 2 Expressed in partial detail view (circular view) figure 1 The tip 2 of the spraying device 1 from which the droplets 4 are ejected and broken up. The droplet 4 is charged by an electric field (arrows represent its field lines) before it disintegrates, the charge being defined as negative in this schematic diagram.

[0048] image 3 A spray device 1 is shown schematically, from which a tip 2 emits a s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

A method for producing an electret filter element according to one of the preceding claims, comprising the steps of: providing fibers (6), providing a spraying device (1) for a fluid, producing a spray cloud (3) of electrically charged fluid droplets (4), guiding the fibers (6) through the spray cloud (3), wetting the fibers (6) with the fluid droplets (4) and depositing the fibers (6) to form a fiber layer (8), is characterized, with regard to the problem of creating a filter element which has a homogeneous charge distribution and a high filter efficiency while being cost-effective to produce, in that the fluid droplets (4) are electrically charged by an electrical field between breakaway fluid droplets (4a) and a counter electrode (5). An electret filter element is produced according to the method.

Description

technical field [0001] The present invention relates to a method for manufacturing an electret filter material, the method comprising the steps of: providing fibers; providing an ejection device for a fluid; generating Spraying; directing fibers through the spray; wetting fibers with droplets and depositing fibers to form a fiber layer. Furthermore, the invention also relates to an electret filter material comprising at least one fiber layer having charged fibers. Background technique [0002] It is known that EP 1417176A1 provides a method in which fibers are guided through a spray of liquid droplets. The size of the droplets is less than 20 μm. In this method, the droplet is charged by splitting using the Lenard effect ("Lenard-Charging-Effect"). The charged droplets are guided through an electric field along with the fibers. In this method, droplets with different polarities are generated in a statistical distribution. The droplets produced here are both positively a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/16D04H1/42D06M11/05D06M11/13D06M11/76D04H3/02
CPCD06M2200/00D06M23/06B01D2239/0435D06M11/76B01D39/1623D04H3/02B01D2239/10D06M11/05D06M11/13Y10S55/05Y10S264/48B01D39/16D04H1/42
Inventor K·韦瑟M·克劳斯T-H·江J·扎博尔德
Owner CARL FREUDENBERG KG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com