Exhaust fan for preventing air pollution

Patent metadata

Field	Value
Publication number	US-12485376-B2
Application number	US-202217846622-A
Country	US
Kind code	B2
Filing date	Jun 22, 2022
Priority date	Jan 24, 2022
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

An exhaust fan for preventing air pollution includes a main body and at least one gas detection module. The main body is configured to form an airflow-guiding path and includes a gas guider and a filtration and purification component disposed in the airflow-guiding path. The gas guider introduces an air convection for guiding an air pollution source contained in an air to pass through the filtration and purification component so as to filter and purify the air pollution source. The at least one gas detection module is disposed in the airflow-guiding path for detecting the air pollution source and transmitting gas detection data.

First claim

What is claimed is:

1 . An exhaust fan for preventing air pollution, comprising:
a main body configured to form an airflow-guiding path and having a gas guider and a filtration and purification component disposed in the airflow-guiding path, wherein the gas guider introduces an air convection for guiding an air pollution source contained in an air to pass through the filtration and purification component so as to filter and purify the air pollution source; at least one gas detection module disposed in the airflow-guiding path of the main body for detecting the air pollution source and transmitting gas detection data; and a microcontroller for receiving the gas detection data from the at least one gas detection module through a wireless communication transmission, and intelligently comparing the gas detection data under a surveillance status, so as to output a driving instruction to control an enablement of the gas guider and adjust a volume of guiding air-flow of the gas guider, wherein the air pollution source is continuously monitored in the surveillance status to ensure the gas detection data does not exceed a safety detection value.

2 . The exhaust fan for preventing air pollution as claimed in claim 1 , wherein the surveillance status is referring to that the air pollution source is continuously monitored to make sure that the gas detection data does not exceed a safety detection value.

3 . The exhaust fan for preventing air pollution as claimed in claim 2 , wherein the safety detection value is at least one selected from the group consisting of less than 35 μg/m 3 of the value of PM 2.5 , less than 1000 ppm of the carbon dioxide content, less than 0.56 ppm of the total volatile organic compounds content, less than 0.08 ppm of the formaldehyde content, less than 1500 CFU/m 3 of the amount of bacteria, less than 1000 CFU/m 3 of the amount of fungi, less than 0.075 ppm of the sulfur dioxide content, less than 0.1 ppm of the nitrogen dioxide content, less than 9 ppm of the carbon monoxide content, less than 0.06 ppm of the ozone content, less than 0.15 μg/m 3 of the value of lead and a combination thereof.

4 . The exhaust fan for preventing air pollution as claimed in claim 1 wherein the at least one gas detection module comprises a control circuit board, a gas detection main part, a microprocessor and a communicator, and the gas detection main part, the microprocessor and the communicator are integrally packaged on the control circuit board and electrically connected to the control circuit board, and wherein the microprocessor controls a detection operation of the gas detection main part, the gas detection main part detects the air pollution source and outputs a detection signal, and the microprocessor receives, computes and processes the detection signal for generating the gas detection data so as to provide to the communicator for an external wireless communication transmission.

5 . The exhaust fan for preventing air pollution as claimed in claim 1 , wherein the at least one gas detection module comprises a control circuit board, a gas detection main part, a microprocessor and a communicator, and the gas detection main part, the microprocessor and the communicator are integrally packaged on the control circuit board and electrically connected to the control circuit board, and wherein the microprocessor controls a detection operation of the gas detection main part, the gas detection main part detects the air pollution source and outputs a detection signal, and the microprocessor receives, computes and processes the detection signal for generating the gas detection data so as to provide to the communicator for an external wireless communication transmission.

6 . The exhaust fan for preventing air pollution as claimed in claim 5 , wherein the microcontroller receives the gas detection data transmitted by the communicator through a wireless communication transmission.

7 . The exhaust fan for preventing air pollution as claimed in claim 4 , wherein the gas detection main part comprises:
a base comprising: a first surface; a second surface opposite to the first surface; a laser loading region hollowed out from the first surface to the second surface; a gas-inlet groove concavely formed from the second surface and disposed adjacent to the laser loading region, wherein the gas-inlet groove comprises a gas-inlet, two lateral walls and a transparent window respectively opened on each of the lateral walls for being in communication with the laser loading region; a gas-guiding-component loading region, concavely formed from the second surface, in communication with the gas-inlet groove and having a ventilation hole penetrated a bottom surface thereof; and a gas-outlet groove concavely formed from a region of the first surface, spatially corresponding to the bottom surface of the gas-guiding-component loading region, and hollowed out from the first surface to the second surface in a region where the first surface is misaligned with the gas-guiding-component loading region, wherein the gas-outlet groove is in communication with the ventilation hole and comprises a gas-outlet mounted thereon; a piezoelectric actuator accommodated in the gas-guiding-component loading region; a driving circuit board attaching to and covering the second surface of the base; a laser component positioned and disposed on the driving circuit board and electrically connected to the driving circuit board, and accommodated in the laser loading region, wherein a light beam emitted from the laser component passes through the transparent window and extends in an orthogonal direction perpendicular to the gas-inlet groove; a particulate sensor positioned and disposed on the driving circuit board and electrically connected to the driving circuit board, and accommodated in the gas-inlet groove at a region in an orthogonal direction perpendicular to a path of the light beam from the laser component, for detecting suspended particulates contained in the air pollution source passing through the gas-inlet groove and irradiated by the light beam emitted from the laser component; a gas sensor positioned and disposed on the driving circuit board and electrically connected to the driving circuit board, and accommodated in the gas-outlet groove for detecting the air pollution source guided into the gas-outlet groove; and an outer cover covering the base and comprising a side plate, wherein the side plate comprises an inlet opening and an outlet opening, and wherein the inlet opening is spatially corresponding to the gas-inlet of the base and the outlet opening is spatially corresponding to the gas-outlet of the base, wherein the first surface of the base is covered by the outer cover, and the second surface of the base is covered by the driving circuit board, so that an inlet path is defined by the gas-inlet groove and an outlet path is defined by the gas-outlet groove, thereby the piezoelectric actuator introduces the air pollution source outside the gas-inlet of the base into the inlet path defined by the gas-inlet groove through the inlet opening, the particulate sensor detects a concentration of the suspended particulates contained in the air pollution source, and the air pollution source enters the outlet path defined by the gas-outlet groove through the ventilation hole is detected by the gas sensor and discharged through the gas-outlet of the base and the outlet opening.

8 . The exhaust fan for preventing air pollution as claimed in claim 7 , wherein the particulate sensor detects information of suspended particles.

9 . The exhaust fan for preventing air pollution as claimed in claim 7 , wherein the gas sensor is selected from the group consisting of a vo

Assignees

• Microjet Technology Co Ltd

Inventors

• Mou Hao-Jan
• Han Yung-Lung
• Huang Chi-Feng

Classifications

• A61L9/014

  containing sorbent material, e.g. activated carbon · CPC title

• B01D2257/91

  Bacteria; Microorganisms · CPC title

• B01D2257/60

  Heavy metals or heavy metal compounds · CPC title

• B01D2257/404

  Nitrogen oxides other than dinitrogen oxide · CPC title

• B01D2257/302

  Sulfur oxides · CPC title