Method and apparatus for measuring fine particulate matters

Patent metadata

Field	Value
Publication number	US-10695706-B2
Application number	US-201816001046-A
Country	US
Kind code	B2
Filing date	Jun 6, 2018
Priority date	Jun 9, 2017
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

An apparatus for measuring fine particulate matter to determine a time to replace each of a filter and an air quality sensor based on a concentration of a filtered fine particulate matter and a method thereof are provided. The apparatus for measuring fine particulate matter is applied to an air cleaner, a personal environment monitoring system (PEMS), a fine particulate matter module, or the like by sensing a target material, such as harmful gas, as well as particulate matter and fine particulate matter in the air and providing result information.

First claim

What is claimed is:

1. An apparatus for measuring fine particulate matter, the apparatus comprising:
a filter configured to filter an introduced target material;
an air quality sensor configured to sense fine particulate matter in the filtered target material and measure a concentration of the fine particulate matter;
a controller configured to determine a time to replace each of the filter and the air quality sensor, based on the measured concentration of the fine particulate matter; and
an air pump configured to be located between the filter and the air quality sensor to assist regeneration of air filter.

2. The apparatus of claim 1 , wherein the filter is configured to be located near an air vent to filter particulate matter (PM10) in the introduced target material to transmit fine particulate matter (PM2.5).

3. The apparatus of claim 1 , wherein the air quality sensor is configured to measure a concentration of the fine particulate matter passing through the filter and an accumulated amount of fine particulate matter sensed during a predetermined time.

4. The apparatus of claim 3 , wherein the controller is configured to determine the time to replace the air quality sensor, using the ratio of an accumulated amount of particulate matter (PM10) and the measured accumulated amount of fine particulate matter.

5. The apparatus of claim 4 , wherein the accumulated amount of the particulate matter (PM10) is measured from particulate matter in the target material sensed during a predetermined time.

6. The apparatus of claim 4 , wherein the controller is configured to:
compare a value of the ratio of the accumulated amounts with a predetermined threshold to determine the time to replace the air quality sensor; and
output alarm information for notifying a user of the time to replace the air quality sensor according to the determined result.

7. The apparatus of claim 1 , wherein the controller is configured to:
compare the measured concentration of the fine particulate matter with a predetermined threshold; and
when the measured concentration of the fine particulate matter is greater than the predetermined threshold, activate the air pump to remove the target material adsorbed onto the filter.

8. The apparatus of claim 7 , wherein the controller is configured to:
determine the time to replace the filter, based on the frequency of being greater than the threshold during a predetermined time; and
output alarm information for notifying a user of the time to replace the filter according to the determined result.

9. An operation method of an apparatus for measuring fine particulate matter, the method comprising:
filtering an introduced target material using a filter located near an air vent;
sensing fine particulate matter in the filtered target material using an air quality sensor and measuring a concentration of the fine particulate matter; and
determining a time to replace each of the filter and the air quality sensor, based on the measured concentration of the fine particulate matter, wherein the determining of the time to replace each of the filter and the air quality sensor comprises determining the time to replace the air quality sensor, using the ratio of an accumulated amount of particulate matter (PM10) and the measured accumulated amount of fine particulate matter.

10. The method of claim 9 , wherein the filtering of the target material comprises:
filtering particulate matter (PM10) in the introduced target material using the filter to transmit fine particulate matter (PM2.5).

11. The method of claim 9 , wherein the measuring of the concentration of the fine particulate matter comprises:
measuring a concentration of the fine particulate matter passing through the filter and an accumulated amount of fine particulate matter sensed during a predetermined time.

12. The method of claim 11 , wherein the determining of the time to replace each of the filter and the air quality sensor comprises:
determining the time to replace the air quality sensor, using the ratio of an accumulated amount of particulate matter (PM10) and the measured accumulated amount of fine particulate matter.

13. The method of claim 9 , wherein the determining of the time to replace each of the filter and the air quality sensor comprises:
comparing the measured concentration of the fine particulate matter with a predetermined threshold; and
when the measured concentration of the fine particulate matter is greater than the predetermined threshold, activating the air pump to remove the target material adsorbed onto the filter.

14. The method of claim 13 , wherein the determining of the time to replace each of the filter and the air quality sensor comprises:
determining the time to replace the filter, based on the frequency of being greater than the threshold during a predetermined time.

15. The method of claim 9 , further comprising:
outputting alarm information for notifying a user of the time to replace each of the filter and the air quality sensor.

16. A computer program being stored in a computer-readable storage medium to perform the method of claim 9 .

Assignees

• Ct Integrated Smart Sensors Found

Inventors

• Cho Hyun Tae
• Kyung Chong Min
• Kim Han Jung

Classifications

• B01D46/71

  with pressurised gas, e.g. pulsed air · CPC title

• G01N2015/0046

  in gas, e.g. smoke · CPC title

• B01D46/442

  by measuring the concentration of particles · CPC title

• G01N15/0272 Primary

  with screening; with classification by filtering (B01D takes precedence) · CPC title

• B01D46/46

  automatic · CPC title