Description:FIELD OF INVENTION

[1] The present invention is related to a personal air purification system, specifically wearable personal respirator devices.

BACKGROUND OF THE INVENTION

[2] In recent years, the importance of air purifiers has become increasingly evident, resulting from poor indoor and outdoor air quality. Air purifiers have become essential in homes, workplaces, outdoor and commercial establishments to provide safe and pure air for respiration.
[3] According to the World Health Organization (WHO), the global respiratory disease attributing to air pollution is estimated 4.2 million premature deaths in 2016 linked to exposure to fine particulate matter (PM2.5) and ozone. Airborne pollutants encompass a wide range of elements, including ionic compounds like sulfate, nitrate, and ammonia, as well as harmful substances such as metal and carbon compounds. These pollutants primarily originate from sources like vehicle emissions, industrial activities, and household combustion. Notably, the prevalence of ultrafine particulate matter (PM0.1) has seen a rapid increase in recent years. These particles, significantly smaller than fine dust (PM2.5), can easily penetrate deep into the respiratory system, posing a significant risk of cardiovascular and respiratory illnesses. According to a study published in the Journal of the American College of Cardiology in 2023, exposure to ultrafine particles has been linked to an increased risk of heart attacks and strokes.
[4] Disposable face mask provides protection from dust with very minimal range of particulate filtration efficiency. However, the major problem associated with the disposable mask is the compromised breathability, suffocation and skin irritation leading users to limited time use and compromised exposure to contaminated environment.
[5] Air purifiers and particularly personal air purifiers come in handy to overcome the limitations of the disposable masks. However, these devices are bulky, complex, and relatively expensive, with filter replacement posing an additional inconvenience. They usually weigh more than 1kg which renders it difficult for the user to carry around.
[6] US201815914036A - The invention discloses handheld and rechargeable personal air purifier that uses ionic technology to remove airborne particles and pollutants. The device generates ions through a discharge process, which are then circulated into the surrounding air by a fan to attract and capture contaminants. It is battery-powered device, allowing the air purifier to be used in small-scale settings. The primary function of the invention is to leverage ionic air purification to filter out dust, pollen, smoke, and delivery positive ionic energy to the user environment.
[7] WO2004033044A1 discloses a self-powered personal air purifier designed for breathing and body protection. It forces ambient air through an air purifying apparatus, enabling the air being directed to a face mask or beneath an airtight clothing layer for body protection. It is suitable for use in scenarios such as airplanes or heavy oxygen tanks.
[8] The present invention address the limitations of both disposable masks and air purifiers, enabling users to directly inhale fresh smooth purified air through a built-in multi sterilization air flow system, allowing for clean air access at any place at user convenience.

SUMMARY OF THE INVENTION

[9] The primary object of the invention is to deliver continuous supply of purified air to the individual, free of harmful pollutants, particulate matter, and bacteria, ensuring respiratory protection in any environment.
Another object of the invention is to create a positive air pressure within the breathing space of the mask, improving the individual’s comfort and reducing the effort required for breathing.

[10] One of the objects of the invention is to continuously assess the quality of the air entering the device, providing the user with real-time information about the surrounding environment and potential risks.

[11] Yet another object of the invention is to provide a scalable design that can be adapted to various sizes and needs, making it suitable for a wide range of users and applications.

[12] Another object of the invention is to provide a solution for personal air purification, combining filtration, sterilization, air quality monitoring, and user comfort in a wearable device.

[13] Embodiments of the present disclosure may include a personal air purifier device with wearable breathing mask unit. Embodiments may also include an air flow system designed to deliver air to the breathing mask.
Embodiments of the invention may include mechanical filters to filter out harmful substances present in the supplied air. Embodiments may also include sterilization filers positioned inside a container to sterilize bacteria, and pathogens.

[14] Embodiments may include an electronic control unit to operate the airflow system. Embodiments may also include a power supply unit to provide electrical current. Embodiments may also include a sensor unit for Real-time monitoring of Air quality levels.

[15] In some embodiments, the breathing mask unit comprises of a face mask and air discharge tube which has passage for air to pass through. In some embodiments, the face mask may be connected to the discharge tube via exhalation port. In some embodiments, the air flow system may include of air supply unit to draw in air from outside. Embodiments may also include air filter unit to filter incoming air. Embodiments may also include a discharge air sterilizer unit configured to sterilize the air released through mechanical filters by exposing incoming air to ultraviolet radiation before it moves into the breathing zone.

[16] In some embodiments, the air supply unit may include, a micro cooling fan positioned in front side of the container to draw in air from the environment. Embodiments may also include air filter unit, a replaceable mechanical filter to filter out harmful pathogens. In some embodiments, the mechanical filter may be HEPA filter, activated carbon filter or filter with zeolite material or in combination thereof.

[17] In some embodiments, the electronic control unit consists of a micro controller regulating the operation of the air flow system and sensor unit. In some embodiments, the electronic control unit may include of communication Interface such as Wi-Fi, Bluetooth, and cellular networks to allow the sensor to transmit data to a display, computer, or cloud-based platform.

[18] In some embodiments, the Power supply unit consists of a Power source which may be a recharagble battery, solar panel, or a electrical grid. In some embodiments, the sensor unit consists of a Sensing Elements such as electrochemical sensors to detect gases like carbon monoxide, nitrogen dioxide, and sulfur dioxide. Embodiments may also include Optical sensors to measure particulate matter or gases like ozone. Embodiments may also include Semiconductor sensors to detect gases like carbon monoxide, nitrogen dioxide, and volatile organic compounds (VOCs).

Respirator Unit
[19] A respirator unit disclosed comprises of a wearable protective breathing mask, a discharge tube, and an adjusting structure. The breathing mask facilitates the circulation of filtered cool air within the breathing space, contributing to user comfort. The mask body includes at least one exhalation port on the nasal portion, connected to one end of the discharge tube, allowing for one-way airflow into the mask. The other end of the discharge tube connects to an air flow system container, supplying fresh air through the exhalation port and creating positive air pressure within the breathing space.
[20] In some embodiments, the mask may further incorporate two exhalation openings strategically positioned to enable the release of user-exhausted air into the external environment. An adjustable cord and restraint strap comprise the adjusting structure, extending around the user's head to secure the airflow system container. The adjustability of the cord allows for a customized and comfortable fit.

Air Flow System And Container
[21] The airflow system is housed within an enclosed container, which is generally rectangular in shape. The container comprises a front case and a back case, assembled together to form a secure enclosure. The front case includes a chamber designed to house a micro cooling fan, while the back case features a chamber for a removable battery.
[22] A middle panel within the container accommodates the electronic control unit, and a horizontal rectangular cavity provides a casing for an interchangeable filter. A snap lock on the back case ensures the secure positioning of the subassemblies inside the container. At least one valve on the container connects to the discharge tube. The outer side of the front case features a display unit, electrically connected to the control unit, which displays information regarding the respirator's status and Air quality level. Additionally, the outer side of the back case includes a socket, attached to the battery for connecting an external power supply, and a switch, electrically connected to the control unit, for powering the device on and off.
Air Flow System
[23] Air flow system comprises of air supply unit, air filter unit, and air sterilizer unit
An Air Supply Unit
[24] An air supply unit disclosed comprises of an air inlet fan configured to draw in ambient air from the environment. The air supply unit further includes a micro cooling fan having three adjustable speeds, with an airflow capacity ranging from 1.8 to 2.4 CFM, allowing users to customize the airflow rate for their comfort. The air inlet fan intakes ambient air, which is subsequently purified by an integrated air filter unit. The purified air is then propelled through a discharge tube towards the mask. The positive air pressure generated by the inlet fan ensures a consistent flow of filtered air into the user's breathing zone, establishing a protective barrier against airborne contaminants.
Air Filter Unit
[25] An air filtration system is integrated within the airflow system housing to effectively filter incoming air. The system comprises a mechanical filter, notably a High Efficiency Particulate Air (HEPA) filter, renowned for its exceptional capability to capture particulate matter, including microscopic particles, bacteria, and viruses, thereby ensuring high capture efficiency for particles and pathogens suspended in the air.
[26] The filtration material employed in the mechanical filter is meticulously engineered with a pore size specifically designed to facilitate the adsorption of both contaminants and oxidants. To further enhance the filter's efficacy, the filtration material may incorporate crystalline porous materials with pore sizes complementary to HEPA filters, working in conjunction with activated carbon and zeolite. This synergistic combination is particularly effective in trapping gas molecules containing contaminants, thereby ensuring superior air quality for the user.

Air Sterilizer Unit
[27] An air sterilizer unit is incorporated between the container and discharge tube, comprising a first sterilizing means configured to irradiate ultraviolet (UV) light onto the air stream moving into the breathing space through the discharge unit. This UV irradiation effectively neutralizes airborne contaminants, including PM2.3 particles, pollen, allergens, and pathogens, thereby preventing their propagation through the discharged air, even when the user is in an infectious state. The sterilizing means, specifically designed to emit UV rays, is strategically positioned within the air discharge passage to ensure thorough sterilization of the air before it enters into the breathing mask.

Electronic Control Unit
[28] An electronic control unit disclosed comprises of electrical connections to the air flow system, power supply unit, display module, and connectivity module. The control unit is configured to perform a variety of functions essential to the operation and monitoring of the respirator.
[29] The control unit's functions include: (a) switching the air flow system on or off, (b) adjusting the air flow speed, (c) detecting pressure within the air flow system, (d) monitoring battery power and alerting the user when it is low, (e) controlling the connectivity module, (f) controlling the display module to show the status of the device (such as remaining battery power, fan speed, and real-time air quality), and (g) controlling and monitoring the overall operation of the respirator. Additionally, the control unit monitors airflow rate, filter pressure drop, and system temperature, providing audible and visual alarms for low battery, low airflow, and high temperature conditions, ensuring the system adheres to relevant safety and performance standards.
[30] Furthermore, the control unit is integrated with a connectivity module, providing Internet of Things (IoT) capabilities for a personalized and data-driven user experience. This allows seamless connection to a dedicated mobile application or central monitoring system, enabling users to remotely monitor device data and performance through the IoT interface.
[31] The control unit design encompasses functional, performance, environmental, electrical, and safety requirements, along with specifications for the circuit diagram, PCB layout, firmware, and testing procedures, ensuring the safe and reliable operation of the respirator system.

Power Supply Unit
[32] A power supply unit is provided to deliver electrical power to the air flow system and control unit of the respirator. The power supply unit comprises a rechargeable and/or replaceable battery. In some embodiments, the battery may be of a type selected from the group consisting of lithium-ion, lithium polymer, and other high-capacity batteries.
[33] The battery is configured to have a capacity of approximately 3200mAh, providing sufficient power for at least 8 to 9 hours of continuous operation when fully charged.
[34] The respirator device is further equipped with a mechanism to provide electrical current for recharging the battery. This mechanism may include a charging port or wireless charging capabilities. An intelligent battery management system is integrated into the device to optimize power consumption, thereby extending the operational time of the respirator and notifying users of low battery levels.

Air Quality Monitoring Sensor Unit
[35] An air quality monitoring sensor unit is provided, configured to be attached to an electronic control unit within the respirator. The sensor unit is designed to measure and track the levels of various pollutants present in the ambient air, including but not limited to particulate matter (PM2.5, PM10), carbon monoxide (CO), ozone (O3), nitrogen dioxide (NO2), sulfur dioxide (SO2), and volatile organic compounds (VOCs).
[36] The air quality monitoring sensor unit operates by continuously sampling the surrounding air, detecting and quantifying the concentration of harmful substances. It may include a variety of sensing elements, such as electrochemical sensors for detecting gases like carbon monoxide, nitrogen dioxide, and sulfur dioxide; optical sensors for measuring particulate matter and ozone; and semiconductor sensors for detecting gases like carbon monoxide, nitrogen dioxide, and volatile organic compounds.
[37] Real-time data collected by the sensor unit is transmitted to a display unit, a connected computer, mobile app interface or a cloud-based platform for further analysis and visualization. This enables users to monitor air pollution levels in their immediate environment and make informed decisions regarding their exposure to harmful pollutants.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates the exploded view of the personal air purifier device assembly.
FIG. 2 is a block diagram illustrating a personal air purifier device, and its embodiments.
FIG. 3 is a block diagram further illustrating the personal air purifier device from FIG. 2, according to some embodiments of the present disclosure.
FIG. 4 is a block diagram further illustrating the personal air purifier device from FIG. 2, according to some embodiments of the present disclosure.
FIG. 5 is a block diagram further illustrating the personal air purifier device from FIG. 2, according to some embodiments of the present disclosure.

DETAIL DESCRIPTION OF THE DRAWINGS

[38] FIG. 1.1 illustrates a respirator unit comprising a wearable protective breathing mask 101, a discharge tube 102, and an adjusting structure 103. The breathing mask 101 facilitates the circulation of filtered cool air within the breathing space, and includes at least one exhalation port 104 on the nasal portion, connecting to one end of the discharge tube 102. The exhalation port 104 is configured for one-way airflow into the breathing mask. The other end of the discharge tube 102 connects the container 201 to the breathing mask 101. The discharge tube 102 supplies fresh air to the breathing space through the exhalation port 104, thereby increasing the positive air pressure for user comfort. In certain embodiments, the mask 101 may further include two exhalation openings, positioned to allow exhausted air to be released into the external environment. The adjustment structure 103 comprises adjustable cord and a restraint strap that extends around the user's neck region, holding the airflow system container 201. It is adjustable by modifying the lengths of the adjusting cord.
[39] FIG. 2 depicts the container 200, which houses the sub-assembly of the device, including the air flow system 120, electronic control unit 130; a power supply unit 140, and a sensor unit 150. In this embodiment, the container 200 is generally rectangular in shape. It includes a front case and a back case assembled together to form an enclosure. The front case features a chamber for mounting a micro cooling fan, while the back case houses a removable battery. A middle panel within the container 200 accommodates the electronic control unit 130 and a horizontal rectangular cavity for a removable filter. A snap lock on the back case secures the internal subassemblies. At least one valve connects the discharge tube 102. The front case outer side has a display unit, electrically connected to the control unit 130 and configured to display respirator status information. The back case outer side includes a socket for connecting to an external power supply and a switch, electrically connected to the electronic control unit 351, to turn the device on or off.
[40] FIG. 3 illustrates the airflow system 120, comprising an air supply unit 213, an air filter unit 214, and an air sterilizer unit. The air supply unit 301 includes an air inlet fan to draw in air and a micro cooling fan with at least 2.2 cubic feet per minute (CFM) airflow capacity, featuring 3-speed settings. The air inlet fan sucks in external air, which is purified by a built-in air filter unit 302 and then directed to the mask 101 through the discharge tube 102. The positive air pressure generated by the inlet fan ensures a continuous supply of filtered air, creating a protective barrier against airborne contaminants.
[41] The air filter unit 214, mounted within the airflow system housing, filters the inflow air using high-efficiency particulate air (HEPA) filters effective in capturing particulate matter, bacteria, and viruses. The filtration material may also include crystalline porous materials with pore sizes complementary to HEPA filters, paired with activated carbon for trapping contaminant gas molecules.
[42] The air sterilizer unit 215 incorporates a first sterilizing means to irradiate ultraviolet light onto the air moving into the breathing space through the discharge unit. This ensures that bacteria and viruses are eradicated, preventing their propagation through the discharged air.
[43] The electronic control unit 130, electrically connected to the airflow system 120, power supply unit 140, display, and is configured to control various functions, including switching the airflow system on/off, adjusting airflow speed, detecting pressure and battery power, and controlling the connectivity and display modules. It also monitors the respirator's operation. The electronic control unit 130 detects battery power, and a display unit displays status information like remaining battery power, fan speed, and real-time air quality. The connectivity module, coupled with Internet of Things (IoT) capabilities, enables personalized experiences and remote monitoring via a dedicated mobile application or central monitoring system.
[44] The power supply unit 140 consists of a rechargeable/replaceable battery, potentially made of lithium-ion or lithium polymer, with a capacity of 3200mAh, supporting at least 4 hours of operation when fully charged. The device can recharge the battery and incorporates intelligent battery management.
[45] The air quality monitoring sensor unit 150, connected to the electronic unit, measures and tracks pollutant levels in the air. It detects substances like PM2.5, PM10, CO, O3, NO2, SO2, VOCs, and other gases. The sensor continuously transmits real-time data to a display, computer, or cloud-based platform for analysis and visualization. It includes various sensing elements like electrochemical, optical, and semiconductor sensors for detecting specific pollutants.

DETAILED DESCRIPTION OF THE INVENTION
[46] In operation, when the device is switched on, the battery establishes an electrical connection with the airflow system, powering the device. The micro fan generates airflow, drawing ambient air through an air inlet composed of multiple openings at one end of the housing. The airflow then passes through the filtering unit, utilizing at least one filter to remove harmful substances, resulting in purified air. This purified air enters the breathing mask via the discharge tube, ensuring the air entering the mask is free of contaminants.
[47] The airflow speed can be adjusted automatically or manually, controlling the fan's rotational speed and consequently the air drawing and supplying velocity. This allows for effective delivery of purified air to the breathing mask with appropriate air pressure.
[48] The housing may include a socket coupled with the recharagble battery, also enabling power supply via a USB power source or wall power socket through a power cable. Alternatively, an external power source like an external battery unit or solar receiver can be used for indoor charging or powering the device.
[49] Air quality sensors integrated into the electronic unit assess the quality of air entering the device. These sensors react with pollutants, generating an electrical signal proportional to the pollutant concentration, which is processed by the microcontroller and transmitted to the display unit.
, Claims:CLAIMS
We claim,

1. A wearable personal air purifier device comprising of;
A wearable breathing mask unit (110);
An air flow system (120) designed to deliver air to the breathing mask; filter out harmful substances present in the supplied air; Sterilize bacteria and pathogens, the said air flow system is positioned inside a container (20);
An electronic control unit (130) to operate the airflow system;
A power supply unit (140) to provide electrical current.
A sensor unit (150) for Real-time monitoring of Air quality levels
2. The device as claimed in claim 1, wherein the breathing mask unit comprises of a face mask and air discharge tube (102) which has passage for air to pass through; the face mask is connected to the discharge tube via exhalation port.
3. The device as claimed in claim 1, wherein the air flow system further comprises of air supply unit (213) to draw in air from outside; air filter unit (214) to filter incoming air; and a discharge air sterilizer unit (215) configured to sterilize the air released through mechanical filters by exposing incoming air to ultraviolet radiation before it moves into the breathing zone.
4. The device as claimed in claim 3, Wherein the air supply unit comprises, a micro cooling fan (313) positioned in front side of the container to draw in air from the environment;
5. The device as claimed in claim 3, wherein air filter unit comprises, a replaceable mechanical filter (413) to filter out harmful pathogens; the mechanical filter may be HEPA filter, activated carbon filter or in combination thereof.
6. The device as claimed in claim 1, wherein the electronic control unit consists of a micro controller (513) regulating the operation of the air flow system and sensor unit.
7. The device as claimed in claim 1, wherein the electronic control unit further comprises of communication Interface (514) such as Wi-Fi, Bluetooth, and cellular networks to allow the sensor to transmit data to a display, computer, mobile app or cloud-based platform.
8. The device as claimed in claim 1, wherein the Power supply unit consists of a Power source which may be a recharagble battery, solar panel, or an electrical grid.
9. The device as claimed in claim 1, wherein the sensor unit consists of a sensing elements to detect gases like carbon monoxide, nitrogen dioxide, volatile organic compounds (VOCs) and sulphur dioxide; and to measure particulate matter or gases like ozone.