Apparatus and method for optimizing air flow in respiratory protective devices

Patent metadata

Field	Value
Publication number	US-2023181942-A1
Application number	US-202218060860-A
Country	US
Kind code	A1
Filing date	Dec 1, 2022
Priority date	Dec 15, 2021
Publication date	Jun 15, 2023
Grant date	—

Abstract

Apparatuses and methods for optimizing air flow in respiratory protective devices are provided. For example, an example respiratory protective device may include a pressure sensor component, at least one fan component, and a controller component. In some example, the controller component is configured to receive a plurality of air pressure indications from the pressure sensor component, calculate a breath pattern indication based on the plurality of air pressure indications, determine a forward rotation speed value for the at least one fan component, and determine a forward rotation start signal transmission time point and a forward rotation stop signal transmission time point for the at least one fan component.

First claim

1 . A respiratory protective device comprising:
a pressure sensor component disposed on an inner surface of the respiratory protective device; at least one fan component positioned adjacent to an inhalation filtration component of the respiratory protective device; and a controller component in electronic communication with the pressure sensor component and the at least one fan component, wherein the controller component is configured to:
receive a plurality of air pressure indications from the pressure sensor component, wherein the plurality of air pressure indications comprises a plurality of air pressure values;
calculate a breath pattern indication based on the plurality of air pressure indications, wherein the breath pattern indication comprises a breath depth value and a breath rate value;
determine a forward rotation speed value for the at least one fan component based on the breath depth value of the breath pattern indication; and
determine a forward rotation start signal transmission time point and a forward rotation stop signal transmission time point for the at least one fan component based on the forward rotation speed value and the breath rate value of the breath pattern indication.

2 . The respiratory protective device of claim 1 , wherein the plurality of air pressure values corresponds to time series data.

3 . The respiratory protective device of claim 2 , wherein the controller component is configured to:
determine a plurality of peak air pressure values and a plurality of valley air pressure values based on the plurality of air pressure values and the time series data; calculate a plurality of peak-to-valley height values based on the plurality of peak air pressure values and the plurality of valley air pressure values; determine a maximum peak-to-valley height value from the plurality of peak-to-valley height values; and set the breath depth value based at least in part on the maximum peak-to-valley height value.

4 . The respiratory protective device of claim 3 , wherein, when determining the forward rotation speed value based on the breath depth value, the controller component is configured to:
compare the breath depth value with a previous breath depth value, wherein the previous breath depth value is associated with a previous forward rotation speed value of the at least one fan component.

5 . The respiratory protective device of claim 4 , wherein the controller component is configured to:
determine that the breath depth value increases from the previous breath depth value; calculate a breath depth increase value based on subtracting the previous breath depth value from the breath depth value; determine a forward rotation speed increase value based at least in part on the breath depth increase value; and set the forward rotation speed value based at least in part on adding the forward rotation speed increase value to the previous forward rotation speed value.

6 . The respiratory protective device of claim 4 , wherein the controller component is configured to:
determine that the breath depth value decreases from the previous breath depth value; calculate a breath depth decrease value based on subtracting the breath depth value from the previous breath depth value; determine a forward rotation speed decrease value based at least in part on the breath depth decrease value; and set the forward rotation speed value based at least in part on subtracting the forward rotation speed decrease value from the previous forward rotation speed value.

7 . The respiratory protective device of claim 1 , wherein, when determining the forward rotation start signal transmission time point, the controller component is configured to:
calculate a forward rotation speed up adjustment time period based at least in part on the forward rotation speed value; determine an inhalation starting time point based at least in part on the plurality of air pressure indications; and set the forward rotation start signal transmission time point based on the inhalation starting time point and the forward rotation speed up adjustment time period.

8 . The respiratory protective device of claim 7 , wherein the controller component is configured to:
transmit a forward rotation start signal to the at least one fan component at the forward rotation start signal transmission time point.

9 . The respiratory protective device of claim 1 , wherein, when determining the forward rotation stop signal transmission time point, the controller component is configured to:
calculate a forward rotation slow down adjustment time period based at least in part on the forward rotation speed value; determine an exhalation starting time point based at least in part on the plurality of air pressure indications; and set the forward rotation stop signal transmission time point based on the exhalation starting time point and the forward rotation slow down adjustment time period.

10 . The respiratory protective device of claim 9 , wherein the controller component is configured to:
transmit a forward rotation stop signal to the at least one fan component at the forward rotation stop signal transmission time point.

Assignees

• Honeywell Int Inc

Inventors

• Tian Hang
• Han Xiaojin
• Shi Wei
• Wang Fei
• Xiang Hongbing
• Chen En Yi

Classifications

• A41D13/11 Primary

  Protective face masks, e.g. for surgical use, or for use in foul atmospheres (eye-masks A61F9/04 {; hoods affording protection against heat or harmful chemical agents A62B17/04}) · CPC title

• A62B18/08 Primary

  Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices (eye-pieces for protective goggles A61F9/02; composition of materials for the windows or other transparent parts A62D7/00) · CPC title

• A62B9/006

  Indicators or warning devices, e.g. of low pressure, contamination · CPC title

• A62B18/02

  Masks (gas-masks for animals A62B18/06; masks for welders A61F9/06) · CPC title

• A62B18/006

  with pumps for forced ventilation (A62B18/045 takes precedence) · CPC title