GB2597531A - Cordless hybrid photovoltaic powered, wireless powered air-purifying respirator self-ventilating helmet - Google Patents

Abstract

An air-purifying respirator helmet, hood or headgear comprising cordless air inlet 3 and outlet 4 that are preferably removably attached to the helmet. Each inlet and outlet house one or more low-noise static pressure fans. Power is provided to an electronic power management system 7 by means of photovoltaic cells 6 and a rechargeable battery 7. The battery can be charged, and the fans powered, by means of a wireless receiver and a wireless transmitter that convert an electromagnetic field from an external source.

Description

Cordless Hybrid Photovoltaic Powered, Wireless Powered Air-Purifying Respirator Self-Ventilating Helmet

Field of the Invention

The invention relates to a system which comprises a hybrid photovoltaic powered and/or wireless battery powered air-purifying respirator unit attached cordlessly to form a self-ventilating helmet. In more particular, the invention relates to the use of low-noise static pressure fan units, to draw in air through a filter and expel stale air, both through and via the cordless self-ventilating units.

Background and review of Art known to the Applicant Conventional battery powered air-purifying respirators (PAPR) are usually worn by human operators in environment or atmospheric surroundings where elements in the atmospheric environment are hazardous which cause detrimental health effects to the human operators. Environmental elements such as air-borne viral droplets, aerosols, particles, dusts, gases and fumes are examples of hazardous elements that are detrimental to the health being of human operators.

PAPR are usually configured with these main components; a face mask, an air-inlet umbilical cord and a battery pack. The air-inlet umbilical cord runs from the back of the face mask to a bulky battery pack unit that is tightened with a buckled strap at waist-level for the wearer. Within the battery pack, it consists of a blower fan that draws external air into the face mask, usually through a High Efficiency Filter (HE) filter that spans a large volumetric surface. As conventional PAPR are made up of multiple components, it results in the wearer having to wear and tighten several components to their body and face at any single time, such configuration easily become cumbersome for the wearer. The long air-cord that is connected between the battery pack and the face mask presents potential detrimental issues during operation. Being a lengthy umbilical air-tube, the air-cord risks running into the possibilities of being caught and tangled by external objects whenever the wearer manoeuvres around. As the long air-cord are loosely movable between the face mask and battery blower unit, the air-cord tends to be designed with grooves and crests to allow the air-cord limited degree of flexibility in movement. However, it is such manoeuvrability that causes the air-cord to suffer from twists and turns which results in an air-pressure drop into the face mask for the human operator.

Having multiple separate hardware components within the PAPR also poses issues for cleaning and/or disinfection processes. The cleaning process for multiple separate hardware components will take longer to complete as each hardware needs to be sanitised individually. Having grooves and crests along the long air-cord also presents the risks of harmful elements not being thoroughly cleaned and are left hidden within the grooves of the air-cord.

As PAPR operates at a minimum of 12 Vdc (Volts Direct Current), it essentially prohibits the electronic parts of the PAPR to be sanitised in clean room facility where Ethylene Oxide disinfection is used.

The recent worldwide shortages of Personal Protection Equipment (PPE) in the current pandemic, Covid-19, poses several issues for face masks and PAPR used by both medical health workers and general public. While most face masks in the likes of surgical mask, KN95 and N95 masks are used to help prevent the spread of airborne particles, however due to the multiple layers of filter on the masks and stringent tight fittings, it makes breathing difficult for wearers and required to be changed every four or so hours. Also, the adverse environmental impact of disposable masks has not been addressed; it is not sustainable in the long run.

Therefore, it is the aim of this invention to address the shortcomings of current PAPR and face masks and to present a novel reusable cordless self-ventilating helmet.

Summary of the Invention

In a first broad independent aspect, the invention provides a cordless hybrid photovoltaic powered and wirelessly powered air purifying respirator, wherein the respirator comprises a cordless air-inlet and air-outlet; wherein the cordless air-inlet and air-outlet comprises at least 1 to N stages low-noise static pressure fans, and an electronic management system to form a self-ventilating helmet, comprises at least one or any combination of the following configurations: thin-film photovoltaic cells convert solar energy to electrical energy to power and charge the electronic management system; an electronic management system comprises a power sharing electronic management circuit and a rechargeable battery for powering the fan units; the electronic management circuit comprises a power sharing management unit to split power to charge the battery and power the fan units; the power sharing electronic management circuit comprises a dedicated wireless transmitter and wireless receiver; the electronic management circuit comprises a dedicated wireless receiver that converts the received alternating electromagnetic field from an external source to charge the rechargeable battery; the electronic management circuit comprises a dedicated wireless transmitter that generates and transmits alternating electromagnetic field energy to provide power at ultra-short distance into the self-ventilating respirator helmet; the self-ventilating respirator helmet comprises a dedicated wireless receiver that converts received alternative electromagnetic field energy to direct current energy to power the fan units housed in the detachable cordless air-inlet and cordless air-out; the detachable cordless air-inlet and air-outlet comprises at least 1 to N stages of low-noise static pressure fans each; the cordless air-inlet draws fresh air into self-ventilating helmet and cordless air-outlet expels stale air out of self-ventilating helmet; the self-ventilating helmet comprises only a wirelessly powered electronic management system is configured for indoor applications; the self-ventilating helmet comprises a transparent wide-angle horizonal and downward vertical field of view; wherein the self-ventilating helmet comprises a loose cover to provide a full protection for /0 wearer; In a subsidiary aspect, N is greater or equal to 2.

In a second broad independent aspect, the invention provides a cordless self-ventilating helmet system comprises at least one thin-film photovoltaic cell to draw and convert direct sunlight energy into direct current electrical energy to power and charge the power sharing electronic management system, of which the power sharing electronic management system comprises a power sharing electronic management circuit and a rechargeable battery.

In a third broad independent aspect, the invention provides a cordless self-ventilating helmet system where the power sharing electronic management circuit detects the presence of photovoltaic energy, wherein in the physical presence of photovoltaic cells the management circuit step-up or step-down the converted direct current electrical energy to power the fan units and charge the rechargeable battery concurrently.

In a fourth broad independent aspect, the invention provides a cordless self-ventilating helmet system where in the physical absence of the photovoltaic cells, the management circuit will operate only with the in-built rechargeable battery to power the fan units.

In a fifth broad independent aspect, the invention provides a cordless self-ventilating helmet system where the power sharing electronic management circuit comprises a dedicated wireless receiver and a dedicated wireless transmitter.

In a subsidiary aspect, the wireless receiver within the power sharing electronic management circuit further comprising the step to convert the received electromagnetic field energy from an external wireless charger configuration into direct current electrical energy, where the external charger can be an external wall adapter powered wireless charger, to charge the rechargeable battery.

In a further subsidiary aspect, the wireless transmitter within the power sharing electronic /0 management circuit further comprising the step to generate and transmit alternating electromagnetic field energy providing power wirelessly at ultra-short distance into the self-ventilating helmet.

In a sixth broad independent aspect, the invention provides a cordless self-ventilating helmet system further comprises a dedicated wireless receiver that is configured to receive alternating electromagnetic field energy and convert it to direct current electrical energy to feed into the cordless air-inlet and cordless air-outlet.

In a seventh broad independent aspect, the invention provides a cordless self-ventilating helmet system where the cordless air-inlet and cordless air-outlet are configured to be in a backward-facing position away from the self-ventilating helmet to eliminate any direct contact with forward face to face droplet and aerosol contact, wherein the cordless air-inlet and air-outlet further comprises the configuration of detachable and movable positions along the self-ventilating helmet.

In an eighth broad independent aspect, the invention provides a cordless self-ventilating helmet system where the cordless air-inlet and cordless air-outlet further comprises at least 1 to N stages low-noise static pressure fans.

In a subsidiary aspect, said minimum 1 to N stages low-noise static pressure fan units comprises compact size fans configured in series to enhance the fan static pressure performance against a particulate filter.

In a further subsidiary aspect, the low-noise static pressure fan performance is incremented sequentially with each additional fan configured in series of the preceding fans.

In a ninth broad independent aspect, the invention provides a cordless self-ventilating helmet system where the cordless air-inlet comprises at least 1 to N low-noise static pressure stage fan unit which draws in external air through a removable compact size particulate filter into the self-ventilating helmet, wherein the compact particulate filter prevents external health hazardous particle elements from entering the self-ventilating helmet.

In a tenth broad independent aspect, the invention provides a cordless self-ventilating helmet system comprises a compact particulate filter with a double walled compartment where the external wall is configured to allow the compact filter to be tightened or removed from the self-ventilating helmet, wherein the internal wall houses the particulate filter and serves as an extra layer of protection to external hazardous elements from entering the self-ventilating helmet.

In an eleventh broad independent aspect, the invention provides a cordless self-ventilating helmet system where the cordless air-outlet comprises at least 1 to N stages low-noise static pressure fans that expel the stale air and carbon dioxide generated by the wearer, out of the self-ventilating helmet.

In a twelfth broad independent aspect, the invention provides a cordless self-ventilating helmet system, where the cordless air-inlet and cordless air-outlet further comprising the concurrent drawing of fresh air into and expelling of stale-air out of the self-ventilating helmet, wherein the concurrent method ensures a continuous circulation of fresh air within the self-ventilating helmet.

In a thirteenth broad independent aspect, the invention provides a cordless self-ventilating helmet system, comprises a transparent visor to protect against face to face direct droplets and aerosol for the wearer.

In a subsidiary aspect, the cordless self-ventilating helmet further comprises a wide-angle horizontal and a full vertical downward view for the wearer.

In a further subsidiary aspect, the cordless self-ventilating helmet comprises a detachable light-weight loose cover, where the light-weight loose cover is configured to allow a full protection for the wearer by a full enclosure of the head and facial area.

In a fourteenth broad independent aspect, the invention provides a power sharing electronic management system, comprising the following configuration methods: fully sealed and encapsulated low-voltage electronic management circuit and a rechargeable battery; detection of the presence of an external magnetic switch to enable or disable the electronic management circuit; determining the presence of external power source being from thin-film photovoltaic cells or from an external wireless transmitter connected via a wall adapter; determining the temperature of battery during charging to ensure battery does not overcharge; LED power indicator to exhibit the level of battery power left within the circuit; emergency LED torch control in the event of an indoor power failure; magnetic shielding from electromagnetic field energy.

In a subsidiary aspect, said electronic management system incorporates a fully sealed and encapsulated electronic management circuit unit and rechargeable battery unit to allow the ease of cleaning and/or disinfection process, wherein the electronic management circuit operates at low voltage configuration; In a further subsidiary aspect, said method to detect the presence of a magnetic switch to enable the electronic management circuit, where the presence of a magnetic switch will short circuit the embedded Reed switch within the electronic management circuit so as to enable and power the electronic management circuit, wherein the removal of the magnetic switch will open circuit the Reed switch and disable the electronic management circuit.

In a further subsidiary aspect, said method electronic management circuit which when enabled will determine the presence of thin-film photovoltaic cell or externally powered /0 wireless transmitter, where the electronic management circuit will power split the incoming electrical energy source to charge the battery and/or power up the fan units.

In a further subsidiary aspect, said method electronic management circuit monitors the temperature of the battery during charging to ensure that the battery does not overcharge or overheat, wherein the electronic management circuit further comprising the functionality of shutting down the whole system when internal system overheating is detected and resumed operation only when temperature falls below a pre-determined value.

In a further subsidiary aspect, said method electronic management circuit incorporates a LED power indicator to show the battery power remaining, wherein there are different colour indicators to exhibit power, wherein the electronic management circuit comprises the measurement of voltage potential drop and current sense across the battery which is then relayed to the LED power indicator.

In a further subsidiary aspect, said method of an emergency frontal LED torch is configured to illuminate the frontal vision for the wearer, in the event of an indoor lighting power failure.

In a further subsidiary aspect, said method electronic management circuit incorporates a magnetic shielding to eliminate spurious effects of electromagnetic field energy, wherein the electromagnetic field energy operates at ultra-short distance.

In a fifteenth broad independent aspect, the invention provides a cordless air-inlet and cordless air-outlet, comprising the following configurations: detachable from the self-ventilating helmet; position of the cordless air-inlet and cordless air-outlet can be interchangeable; position of the cordless air-inlet and cordless air-outlet can be relocated along the self-ventilating helmet; built in sound damping and vibration proofing configuration.

built in sound damping and vibration proofing configuration.

In a subsidiary aspect, said method cordless air-inlet and cordless air-outlet are detachable from the self-ventilating helmet, wherein said air-inlet and air-outlet allow the maintenance and changing of the fan units.

In a further subsidiary aspect, said method where the detachable cordless air-inlet unit and cordless air-outlet unit can be configured to change their default position, wherein the cordless air-inlet unit may swap position from left to right, with the cordless air-outlet unit or vice versa, wherein there must be a presence of a cordless air-inlet unit and opposite cordless air-outlet unit.

In a further subsidiary aspect, said method cordless air-inlet and cordless air-outlet unit are movable along the visor geometry of the self-ventilating helmet.

In a further subsidiary aspect, said method where sound damping and vibration proofing materials are configured for the cordless air-inlet and cordless air-outlet to minimise fan noise and vibration to the self-ventilating helmet.

In a sixteenth broad independent aspect, said method comprises an exposed ear curvature self-ventilating helmet that allows external equipment to be plugged into the human operator ear.

In a seventeenth broad independent aspect, the invention provides a cordless self-ventilating helmet configured to operate the method and/or system of any of the preceding aspects

Brief Description of the Figures

Figure 1 shows a perspective view of a cordless hybrid photovoltaic and wireless powered air-purifying respirator helmet worn by a wearer to an embodiment of the invention; Figure 2 shows a perspective view of a cordless wireless powered air-purifying respirator helmet worn by a wearer to an embodiment of the invention; Figure 3 shows a system level block diagram of the photovoltaic and/or wireless power management, with power level indicator. The electronic management system is connected wirelessly via induction charging and reception, to the helmet, which consists of at least 1 to N stages fans for both input and output coupled with an emergency torch light; Figure 4 shows a left-side view of the helmet showing the air-inlet to the cordless respirator; Figure 5 shows a right-side view of the helmet showing the air-outlet from the cordless respirator; Figure 6 shows a back view of the helmet, which consists of a back-pocket porch which contains a removable electronic management system that provides photovoltaic (solar cell) and/or wireless power management, with power level indicator; Figure 7 shows a front view of the helmet showing a hardened transparent visor that offers a wide-angle horizontal view and a downward vertical field of view; Figure 8 shows a cross-sectional top view of the cordless incoming air-inlet and outgoing air-outlet; Figure 9 shows a cross-sectional view of a double layer compact filter housing; Figure 10 shows an example of an existing corded air-tube PAPR technology; Figure 11 is a graph of airflow against static pressure of a typical blower fan; Figure 12 is a graph of airflow against static pressure of at least 1 to N stages static pressure fans; Figure 13 shows a perspective view of the movable positions of the air-inlet and air-outlet; Figure 14 shows a cross-sectional perspective view of the acoustic sound proofing material; Figure 15 shows a perspective view of the electronic management system and LED power level indicator; Figure 16 shows a perspective view of the physical electronic management system to an embodiment of the invention; Figure 17 shows perspective view of the magnetic shielding for the wireless induction reception; Figure 18 shows a perspective view of the wire guard housing; Figure 19 shows a perspective view of an exposed ear self-ventilating helmet

Detailed description of the figures

Figure 1 shows a hybrid photovoltaic powered and wireless powered air purifying respirator self-ventilating helmet 1A, the invention, that can be worn either indoor or outdoor. The hybrid respirator helmet is worn by a wearer 100. The self-ventilating helmet 2 has both a cordless air-inlet 3 and air-outlet 4 connected. Both the cordless air-inlet 3 and air-outlet 4, each houses at least 1 to N stages of low-noise static pressure fans. The cordless air-inlet 3 and air-outlet 4, are detachable from the self-ventilating helmet 2 and their positions are interchangeable.

The air-inlet 3 draws fresh air into the helmet 2 via a compact filter housings that contains a HE (High Efficiency) particulate filter or other suitable filters that can be used, while the air-outlet 4 expels stale air out of the helmet 2. Thereby both cordless air-inlet 3 and air-outlet 4 provide a continuous stream of air circulation for the wearer 100.

The photovoltaic (solar) cells 6 consists of light weight thin-film solar panels that are made with solar cells which have light-absorbing layers about 350 times smaller than that of a standard silicon panel. These light weight thin-film solar panels are moderately efficient but sufficient to be used as an electrical power source generator for the embodiment of the invention.

The hybrid powered wireless respirator device has an encapsulated and fully sealed electronic management system unit 7, which contains an electronic management circuit and a portable lithium-polymer (Li-Po) rechargeable battery for wirelessly powering up at least 1 to N stages low-noise static pressure fans. The electronic management system unit 7 has two dedicated wireless ports to power at least 1 to N stages low-noise static pressure fans and to wirelessly charge the portable battery separately. The encapsulated and fully sealed electronic management system unit 7 allows stringent disinfection process where Ethylene Oxide is employed as well as allowing other disinfection processes to be carried out with ease.

The encapsulated and fully sealed electronic management system unit 7 has a battery power level indicators that allows wearer 100 to monitor the battery usage and remaining power. The electronic management system unit 7 uses an external magnet 9 to activate the internal Reed switch encapsulated within the sealed electronic management system unit 7 to either switch on or off the at least of 1 to N stages low-noise static pressure fans. The electronic management system unit] slots in and out of a back pocket of helmet 2, it uses a retainer spring pin 10 to grip the sealed electronic management system unit 7 in place at the back pocket of helmet 2.

The self-ventilating helmet 2 has a transparent visor 11 that provides a horizontal wide-angle view and a full downward vertical field of view for wearer 100. The visor 11 allows wearer 100 a greater visual visibility compared to existing available technologies that only provide horizonal views.

The detachable air-inlet 3 and air-outlet 4 units have built-in sound-absorption and vibration-absorption material 12 to further reduce noise from the low-noise static pressure fans to a minimal acoustic level, and at the same time minimises vibration to the self-ventilating helmet 2.

The self-ventilating respirator helmet 2 has an emergency torch-light control 13 that is controlled and powered by the electronic management system unit 7. The emergency torch-light control 13 is illuminated by a bright lumens LED (Light-Emitting Diode) surface mount component that provides emergency lighting for wearer 100 in the event of a power failure when the wearer 100 uses the helmet 2 in an indoor environment.

There are cable guards 14 to house low-power electrical wires from the fans to the back of the self-ventilating respirator helmet 2, where a dedicated wireless receiver receives power for the fans, from a wireless transmitter within the encapsulated and fully sealed electronic management system unit 7.

The self-ventilating respirator helmet 2 has a detachable loose covering 15 that provides a full protection layer for wearer 100 from between the helmet 2 to back shoulder and/or to chest level. The detachable loose covering 15 is of lightweight materials and removable for easy cleaning and disinfection.

Figure 2 shows a wireless battery powered air purifying respirator self-ventilating helmet 1B, the invention, can be worn by wearer 100 in an indoor environment where there is no direct or sufficient sunlight. The functionality of the respirator unit in Figure 2 is exactly the same as the hybrid respirator unit detailed in Figure 1, except without the thin-film photovoltaic cells 6 of Figure 1. The self-ventilating respirator helmet 2 may be used in an environment which contains elements which without the respirator helmet 2, would be harmful or have a detrimental health effect for wearer 100, for example in an intensive care unit where direct contact with possible direct face-to-face air-borne elements or particles may be encountered by wearer 100.

For visual ease of detailing the invention, the detachable loose covering 15 detailed in Figure land Figure 2 will not be shown in subsequent figures and diagrams, but still form part of the invention.

Figure 3 shows the top system level of the hybrid photovoltaic powered and/or wireless powered air purifying respirator electronic management system for either self-ventilating helmet IA or 1B, of Figure land Figure 2 respectively. Generally, a single photovoltaic solar cell produces about 0.7 V (Volts). By stacking several cells together, the thin-film solar panel 6, of Figure 1, will be able to supply voltages and provide input power for the respirator system. However, due to inconsistencies in the amount of sunlight shining on a panel, there will be temperature variations and the high impedance of the cell stack. Photovoltaic solar panels require operation at a maximum point to output the greatest power with the highest efficiency. As opposed to most solar management systems that operate only in buck mode, that is stepping down voltage from a high input, for example 18V (Volts) to 5V (Volts) to power up the electronic respirator system. The power sharing management system unit 7, is able to step down or step up the input voltage to the battery. The electronic management system operates at an input voltage ranging from 3.5V to 24V, thereby is compatible with thin-film solar panels that have open circuit voltage of up to 24V. With the buck, boost and buck-boost capabilities, the electronic management circuit unit 7A can take a solar power input voltage that is lower or higher than what the low-noise static pressure fans and rechargeable battery require and step up or step down to charge the rechargeable battery 7B and the electronic management system constantly monitors the temperature of the rechargeable battery 78 via a built-in temperature sensor to ensure over-charging does not occur. The electronic management circuit unit 7A will at the same time, ensure the low-noise static pressure fans are powered up in full operation.

The electronic management system unit 7 in Figure 3 has an induction wireless charger 7C that uses electromagnetic induction to provide electrical energy that transmit power wirelessly to a magnetic shielded power induction wireless receiver 16. Energy is transferred through inductive coupling. An AC (Alternating Current) runs through an induction coil in the transmission coil. Any moving electric charge creates a magnetic field, as stated by Oersted's law. The magnetic field fluctuates in strength as the AC current is continually changing amplitude. A changing magnetic field generates an electromotive force otherwise known as Faraday's law of induction. Both the transmitter and receiver induction coils are tuned to oscillate or resonate at the coils frequency to maximise the alternating electromagnetic field energy transfer between the transmitter and receiver.

The wireless transmitted energy or alternating electromagnetic field, picked up by the wireless receiver 16, is converted back to electrical voltage and then used to power up the low-noise static pressure fans housed within air-inlet 3 and air-outlet 4, that draws in filtered fresh air through the HE filter 5 and concurrently expels the stale air through air-outlet 4 respectively.

When an external magnet 9 is connected to the electronic management system unit 7, it will activate and short-circuit the internal Reed switch 7E within the electronic management circuit unit 7A. The electronic management circuit unit 7A will switch on and determine if there is sufficient direct sunlight energy coming into the photovoltaic thin-film solar cells 6. If the sunlight energy is sufficient to power up both system unit 7 and the air-inlet 3 and air-outlet 4, the remaining harvested sunlight energy will be power-shared and used to charge up the Li-Po rechargeable battery 7B. If sunlight energy is computed to be insufficient, the electronic management circuit unit 7A will automatically switch over to the portable battery powered management instead. In the physical absence of photovoltaic thin-film solar cells 6, the invention of configuration 1B in Figure 2 will only be used in indoor applications. The electronic management circuit unit 7A will operate automatically and solely on battery but at the same time detect if there is energy received by a dedicated induction wireless receiver 7D.

The electronic management system unit 7 in Figure 3 has an electronic circuitry that monitors the rechargeable battery capacity and allows the wearer 100 detailed in Figure 1 and Figure 2 to determine the amount of remaining battery power via a power LED indicator 8. The voltage potential across the rechargeable battery is measured on an interval snapshot basis, there is also a current sense measurement of the rechargeable battery. Both the measured voltage potential and current measurement provide an accurate indication for the electronic management circuit unit 7A to compute and light up the power LED indicator 8 accordingly.

Within the electronic management circuit unit 7A, there is an emergency torch LED control 13 that allows wearer 100 detailed in Figure land Figure 2 to turn on a frontal bright LED that illuminates the frontal vision. The emergency torch LED control 13 is an important part of the invention, in the event for example where the wearer 100 detailed in Figure 1 and Figure 2 is outdoor in darkness or when the wearer 100 detailed in Figure 1 and Figure 2 experiences a near or complete darkness while indoor where sudden indoor lighting failures occur.

There is a dedicated separate induction wireless receiver 7D within the electronic management circuit unit 7A. The wireless receiver 7D is used to receive alternating electromagnetic field energy from an external separate dedicated induction wireless charger 17, usually powered by an electrical wall power adapter. The alternating electromagnetic field energy received by 7D is converted into direct current electrical energy which are then used to charge the portable battery 7B.

Figure 4 shows the left-side view of a self-ventilating helmet 1A detailed in Figure 1, the cordless air-inlet 3 that is connected to helmet 2. This can be replicated in the opposite position, right hand side, and identically applicable for self-ventilating helmet 1B detailed in Figure 2. The helmet 2 has a detachable fan housing 3. The detachable fan housing 3 is able to house at least 1 to N stages low-noise static pressure fans. The low-noise static pressure fans are stacked in series depending on the requirement of the filter used in filter housing 5. Fans with high static pressure performance allow fresh air from external environment or atmosphere, to be drawn through filters, thereby preventing any particles of harmful elements entering the air passage way within helmet 2 that causes detrimental health issues for wearer 100.

Figure 5 shows the right-side view of a self-ventilating helmet 1A detailed in Figure 1, the cordless air-outlet 4 is connected to helmet 2. This can be replicated in the opposite position, left hand side, and identically applicable for self-ventilating helmet 1B detailed in Figure 2. The helmet 2 has a detachable fan housing 4 which contains at least of 1 to N stages low-noise static pressure fans to expel stale air trapped within helmet 2.

By having both the air-inlet 3, which contains at least 1 to N low-noise stages static pressure fans and air-outlet 4 with a single low-noise static pressure fan, or a minimum of 2 to N low-noise static pressure fans, operating at the same time, the invention thereby ensures and provides a continuous stream of fresh air for wearer 100.

Figure 6 shows the back-view of the self-ventilating helmet 1A detailed in Figure 1, the encapsulated and fully sealed electronic management system unit 7 is inserted into a fixed hardened back pocket of helmet 2 and is held and tightened in position by a pin retainer 10. The on-off operation of the electronic management system unit 7 is controlled by an external magnet 9. By inserting or removing the external magnet 9 into the electronic management system unit 7, the electronic management system unit 7 will then operate as detailed in Figure 3. The power LED indicator 8, as detailed in Figure 3 lights up according to the battery power remaining in the system, from double green LED (100% -50%) to amble colour (50% -15%) then finally in red colour (15% -5%) of battery power remaining in the electronic management system unit 7. This configuration can be replicated in the same back position, identically applicable for self-ventilating helmet 1B detailed in Figure 2.

Figure 7 shows the front-side view of the self-ventilating helmet 1A detailed in Figure 1. Unlike current visor technology that only offers horizontal view for the wearer, the transparent visor within this invention not only provides a wide-angle horizontal view of 170 degrees or more for wearer 100, but also provides a full downward vertical field of view for wearer 100. This configuration can be replicated in the same front position, identically applicable for self-ventilating helmet 1B detailed in Figure 2.

Figure 8 shows a top side cross-sectional view of the cordless self-ventilating helmet 1A detailed in Figure 1, which can be identically applicable for the cordless self-ventilating helmet 1B detailed in Figure 2. The detachable air-inlet unit 3 is connected directly to the helmet, thereby eliminates the need of any external umbilical air-cord. The air-inlet 3 houses at least 1 to N stages low-noise static pressure fans 3A, the fans spin synchronously and draw fresh air from external environment into and via the removable compact filter cover 5 that contains a particulate filter 5A which blocks off external harmful environmental elements or particles to the wearer. Fresh air that is constantly drawn in by air-inlet 3 passes through an air funnel 3B which delivers the fresh air directly to wearer within the helmet. An inventive feature of this invention, that is not available in current PAPR technology, is the ability to expel stale air out of the helmet. Stale air is generated when the wearer 100 inhales fresh air and exhales back into the helmet. An air-outlet 4 houses at least 1 to N stages low-noise static pressure fans 4A that expels the stale air within the helmet via a cordless air funnel 4B, out of the helmet detailed in Figure 1 and Figure 2.

By having both air-inlet unit 3 and air-outlet unit 4 operating synchronously, the invention ensures a continuously stream of fresh air circulation for the wearer.

Figure 9 shows the cross-sectional view of the removable compact particulate filter cover unit 5, which has been scaled to a ratio of 3:1 to describe its functionality. The removable compact filter cover unit 5 houses a particulate filter 5A that serves as a barrier to trap hazardous external environmental or atmospheric elements that would otherwise be harmful to the wearer if inhaled directly. External fresh air is drawn via a honey-combe mesh 5B and through the particulate filter 5A.

The removable compact filter cover unit 5 has a double walled structure that serves two purposes; the screw threads within the internal wall of SC is used to attach cover unit 5 to the air-inlet 3, detailed in Figure land Figure 2, while the internal structure wall SD serves as another layer of insulation or protection to prevent external environmental elements from entering the helmet and at the same time houses the particulate filter of SA.

There are significant disruptive differences and improvements when performing a comparison of this invention, hybrid photovoltaic powered and wireless powered air purifying respirator self-ventilating helmet detailed in Figure 1, Figure 2 and Figure 3 against a typical PAPR technology available commercially, shown in Figure 10.

Conventionally available PAPR comes in the configuration of Figure 10, with main components; a face mask, an air-inlet umbilical cord 18 that runs from the back of the face mask to waist-level battery pack unit 19 and the battery pack unit 19 is tightened with a strap 19A at waist-level for the wearer. Within the battery pack, it consists of a blower fan that draws external air into the face mask, usually through a HE filter that spans a large /5 volumetric surface.

Conventional PAPR, made up of multiple components results in the wearer having to wear and tighten several components to their body and face at any single time. The multi-components configuration becomes cumbersome for the wearer. Whereas the invention detailed in Figure 1, Figure 2 and Figure 3 offers an all-in-one solution. The self-ventilating helmet is worn by wearer 100 without the need to have multiple components attached to different body parts of the wearer.

The long air-cord 18 that is connected between the battery pack and the face mask gives rise to several possible detrimental issues during operation. Being a long air-cord umbilical tube, the air-cord risk running into the possibility of being caught and tangled by external objects whenever the wearer manoeuvres around. For example, if a PAPR wearer works in a hazardous environment which is contagious. In an event of the air-cord being caught and raptured by external objects, the wearer would run into life threatening situation.

Depending on the manoeuvre positions of the wearer, the long air-cord between the battery pack and face mask is likely to encounter situations where it suffers from turns and twists. Due to the lengthy air-cord, the incoming air that is generated by the blower fan unit is likely to encounter resistance across and within the twisted air-cord umbilical tube, resulting in a drop of air pressure that is intended to be transported to the wearer. The novel cordless air-inlet invention detailed in Figure 1, Figure 2 and Figure 3 removes hazardous elements and constantly provides air stream that does not suffer from pressure drop as this invention no longer requires the need for an air-cord umbilical tube.

When using existing PAPR of 18 and 19 in a hazardous environment that would give rise to health and safety issues to the wearer, for example in a contagious enclosed environment, the PAPR of 18 and 19 would require tedious and proper disinfection process after each use. Currently the disinfection processes for PAPR of 18 and 19 are carried out manually or through a "clean-room" disinfection process.

In manual disinfection process, the multi-components that make up the face mask would need to be cleaned individually by warm water followed by disinfection liquid solutions through several stages of cleaning. This poses several issues; the long air-cord between the battery pack and face mask usually has grooves and crests along the tube, which makes disinfecting the air-cord difficult and also risks having contagious elements left unremoved and hidden within the grooves of the air-cord umbilical tube. Cleaning and disinfecting the PAPR 18 and 19 can be a time-consuming lengthy process due to the multiple components need to be disinfected individually.

In a "clean-room" disinfection process, used PAPR of 18 and 19 would have to go through Ethylene Oxide disinfection process, usually at 60 degC. Such disinfection process faces several restrictions. Although Ethylene Oxide is widely used as a disinfection process in United States of America, it is currently attracting legal scrutiny within the European Union community due to its toxic effects towards human beings, with on-going legal legislation discussions of whether such substance for disinfection can be used in future. The other issue with Ethylene Oxide disinfection is that it cannot disinfect equipment that operate at a voltage of more than 12V, this is where the current PAPR faces a cliff-edge pitfall. The blower fan used in PAPR of 18 and 19 requires a minimum of 12V to operate, therefore it treads on a grey area of being able to be disinfected by Ethylene Oxide process.

The cordless hybrid photovoltaic powered, wireless powered air-purifying respirator helmet invention detailed in Figure 1, Figure 2 and Figure 3 eliminates the disinfection issues encountered by the current PAPR of 18 and 19. Being an all-in-one solution, there is no multiple components to clean which would leave the human cleaner more time to concentrate solely in cleaning one part with reduced cleaning time. The cordless connection in this invention ensures that there is no external air-cord umbilical tube that would be accidentally tangled or even raptured by external objects due to wearer moving around nor would it suffer from any air-pressure drop as there will not be any situation of turning or twisting.

During a manual disinfecting process, there are no grooves nor crests to disinfect, therefore provides a safer and more thorough and effective disinfection process as compared to the PAPR of 18 and 19. Disinfection time for the invention of Figure 1, Figure 2 and Figure 3 is significantly reduced since there is only a single unit to clean and disinfect.

The fully sealed and encapsulated electronic management system unit 7 in this invention detailed in Figure 1, Figure 2 and Figure 3 uses a 5V low power to manage both the electronic devices and at least 1 to N stages low-noise static pressure fans, therefore it could undergo Ethylene Oxide disinfection process, if needed, with ease as compared to the PAPR of 18 and 19 that operates at a minimum of 12V.

The blower fan of PAPR of 18 and 19 operates at minimum of 60 dBA (A-weighted decibels, a measurement of the fan noise in air). In layman term, the noise generated by the blower fan is equivalent to noisy conversations in a restaurant.

The minimum of 1 to N stages low-noise static pressure fans within this invention detailed in Figure 3, operates typically at 19 dBA for a configuration of three fans stacked and configured in series. In layman term, the noise generated by this invention is equivalent to noise generated by rustling leaves or whispering. The fan noise generated by the N stages low-noise static pressure fans within this invention detailed in Figure 3 is at least sixteen times quieter than the noise generated by the blower fan of PAPR of 18 and 19, therefore offers a quieter surrounding environment for the wearer.

The blower fan used in commercially available PAPR detailed in Figure 10 tends to have a high air-flow rate, however at the expense of; higher fan noise, higher power requirement for operation that restricts cleaning and disinfection processes, as discussed in previous section and a larger size housing that is required to encapsulate the blower fan. This is one of the reasons that the wearer having to tighten the additional component unit 19 via waist strap 19A; consisting of the blower fan and battery unit at waist-level due to its size and heavy weight.

Figure 11 shows the air-flow performance, measured in m3/h, versus static pressure, measured in mmH20, of a typical blower fan that is commonly found in the PAPR of Figure 10. Static pressure is a measurement of how much air-flow can be generated by a fan when there is an obstacle blocking the back of the fan where air can be drawn in, in the likes of a particulate filter. One of the reasons that blower fan requires a substantial area of particulate filter, is due to the low static pressure that blower fan can operate in. HE particulate filter has static pressure of around 1.3 mmH20 which at the expanse of a larger filter area, the blower fan will still be able to draw in air. However, if faced with a situation need to use alternative filters, in the likes of the woven layer of surgical face mask, which has a static pressure of 18 mmH20 and N95 filter with a static pressure of 3.0 mmH20, the blower fan of conventional PAPR detailed in Figure 10 will not be able to draw in any air as the static pressure is far higher than the blower fan static pressure capability of 1.75mm H20, therefore no air can be drawn into the face mask of Figure 10.

The low-noise static pressure fans in this invention detailed in Figure 1, Figure 2 and Figure 3 is at least 5 times smaller in physical size individually when compared to a blower fan and has better static pressure performance. When fans are stacked in parallel to each other, the air-flow in m3/h will be incremented per fold by each additional fan. For example, if 3 fans are placed in parallel, the air-flow will be three times higher than a single fan. When operating with obstructing filters behind the fans, placing fans in parallel will not generate any benefits. However, when the fans are stacked in series, the static pressure performance of the fans will be incremented per fold by each additional fan. The minimum of 1 to N stages low-noise static pressure fans detailed Figure 1, Figure 2 and Figure 3 work on the fundamental basis that at least 1 to N stages fans can and will be stacked in series so that the static pressure performance can be improved. Figure 12 shows the air-flow performance, measured in m3/h, versus static pressure, measured in mmH20, of at least 1 to N stages low-noise static pressure fans that form part of this invention. The low-noise static pressure fan has better performance over the blower fan detailed in Figure 10.

A normal male adult requires oxygen of around 25 L/min (1.5 m3/hr) while walking and 55 L/min (3.0m3/hr) while running. When using at least 1 to N stages fans, the amount of air-flow can be achieved to comfortably supply to a wearer wearing the invention. Taking again an example of 3 fans stacked in series, the air-flow achieved by 3 fans in series is around 133 L/min (8.0m3/hr) when using a particulate filter. If in the situation where surgical face mask with 1.8 mmH20 is needed to be used as a filter, the air-flow achieved by 3 fans stacked in series is 125 L/min (7.5m3/hr). The air-flow achieved for N95 filter is 83 L/min /5 (5.0m3/hr) when an example of 3 fans are stacked in series. Therefore, it can be observed that the performance of the minimum of 1 to N stages low-noise static pressure fan in this invention offers superior performances over the blower fan.

Figure 13 shows the perspective view of the movable positions of air-inlet 3 and air-outlet 4 that can be moved and changed along the face visor at positions 20 and 21, with reference to self-ventilating helmet 1B of Figure 2. Depending on the preference of the wearer 100, the air-inlet 3 and air-outlet 4 can be positioned at either in Figure 2 or in Figure 13. This movable position configuration can be replicated and identically applicable for self-ventilating helmet 1A detailed in Figure 1.

To reduce system vibration and acoustic noise in Figure land Figure 2, there are sound and vibration absorption materials built into the detachable air-inlet 3 and air-outlet 4. Figure 14 shows the locations 22A to 22E of the sound and vibration absorption materials that are built-into the detachable air-outlet 4. The locations of the sound and vibration absorption material are replicated and identically applicable in the opposite position for the air-inlet 3. The built-in sound and vibration absorption material in both air-inlet 3 and air-outlet 4 are configured for self-ventilating helmet 1A detailed in Figure land self-ventilating helmet 1B detailed in Figure 2.

Figure 15 shows the physical encapsulated and fully sealed electronic management hardware system unit 7 detailed in Figure 3. The LED power indicator 8 that is controlled by electronic management hardware system 7 indicates the level of battery power left within the system. When an external magnet 9 is inserted into slot 9A of the electronic management hardware system 7, the electronic management hardware system 7 will power up and switch off when external magnet 9 is removed from slot 9A. A retainer pin 10 is used to spring click and tighten the electronic management hardware system 7 to the self-ventilating helmet of Figure 1 or Figure 2.

Within the encapsulated electronic management hardware system 7 in Figure 15, there is a physical induction wireless charger at location 7C, as detailed in Figure 3, where it is used to transmit alternating electromagnetic field power wirelessly into the self-ventilating helmet 1A or 1B, to power up the low-noise static pressure fan units in both air-inlet 3 and air-outlet 4, detailed in Figure 1 or Figure 2 respectively. The location 7D, with a "WTI" signage, has an encapsulated physical induction wireless receiver, as detailed in Figure 3, which receive wireless alternating electromagnetic power from an external wireless charger to charge the portable battery 7B detailed in Figure 3.

The external wireless charger 17 detailed in Figure 3, is shown in its physical hardware format of Figure 16. The external wireless charger consists of a slot opening 17A for inserting the electronic management hardware system 7 to charge up the portable battery 78 as detailed in Figure 3. Within the wireless charger location 178, there is a physical induction wireless charger that is used to wirelessly transmit alternating electromagnetic energy into electronic management hardware system 7 where the induction wireless receiver 7D, detailed in Figure 3 and Figure 15, converts the alternating electromagnetic field energy into DC (Direct Current) voltage and current to charge up the encapsulated portable battery within the electronic hardware system 7. The base of the external wireless charger 17 consists of a micro-USB circuit and a connector 17C that is used to connect the external wireless charger 17D to a separate external wall adapter to provide power so that the external wireless charger 17 can act as an external wireless alternating electromagnetic field charger for the electronic hardware system 7.

In order to eliminate electromagnetic field generated by induction wireless transmission and reception, a magnetic shield is used to shield off magnetic interferences. Figure 17 shows a cross-sectional perspective view of the self-ventilating helmet 1B of Figure 2, which can be identically applicable for self-ventilating helmet 1A of Figure 1. The induction coil 16A is used as the wireless receiver for the wireless electromagnetic power transmitted by 7C of Figure 3 and Figure 15. A magnetic shield 16B is used to cover up the electronic circuitry for the wireless receiver 16A. The wireless receiver electronic circuitry 16A is housed in 23k The magnetic shield 16B provides magnetic shielding against electromagnetic field that is received from the wireless electromagnetic power 7C of Figure 3 and Figure 15. 16A and 16B in Figure 17 jointly form the magnetic shielded wireless receiver 16 detailed in Figure 3. The small housing incision 23B in Figure 17 is used to lay low-power wires connected from the induction wireless receiver 16A to the fan units housed inside both air-inlet 3 and air-outlet 4 of Figure 1 or Figure 2.

The wires connecting the wireless receiver electronic circuitry 16A of Figure 17 are laid inside the wire guard 14 shown in Figure 18. Low power wires are laid along the small housing incision 23B of Figure 17 and into 14A of Figure 18. The wires are then split into two ways and go through 14B and 14C that feeds low power wires into the air-inlet 3 and air-outlet 4 of Figure 1 or Figure 2.

Figure 19 shows a scenario where the cordless self-ventilating helmet is shaped to have an exposed ear configuration 24. The exposed ear configuration 24 will find its application where wearer 100 may require access to adopt external equipment in the likes of statoscopes to be inserted into the ear. Therefore, having a curved structure helmet at the side will facilitate such application. This exposed ear design can be replicated and identically applicable for self-ventilating helmet 1B detailed in Figure 2.

Claims (1)

1. Claims 1. A system comprising a cordless hybrid photovoltaic powered and wirelessly powered air purifying respirator, wherein the respirator comprises a cordless air-inlet and air-outlet; wherein the cordless air-inlet and air-outlet comprises at least Ito N stages low-noise static pressure fans, and an electronic management system to form a self-ventilating helmet, comprises at least one or any combination of the following configurations: thin-film photovoltaic cells convert solar energy to electrical energy to power and charge the electronic management system; fo an electronic management system comprises a power sharing electronic management circuit and a rechargeable battery for powering the fan units; the electronic management circuit comprises a power sharing management unit to split power to charge the battery and power the fan units; the power sharing electronic management circuit comprises a dedicated wireless transmitter and wireless receiver; the electronic management circuit comprises a dedicated wireless receiver that converts the received alternating electromagnetic field from an external source to charge the rechargeable battery; the electronic management circuit comprises a dedicated wireless transmitter that generates and transmits alternating electromagnetic field energy to provide power at ultra-short distance into the self-ventilating respirator helmet; the self-ventilating respirator helmet comprises a dedicated wireless receiver that converts received alternative electromagnetic field energy to direct current energy to power the fan units housed in the detachable cordless air-inlet and cordless air-out; the detachable cordless air-inlet and air-outlet comprises at least Ito N stages of low-noise static pressure fans each; the cordless air-inlet draws fresh air into self-ventilating helmet and cordless air-outlet expels stale air out of self-ventilating helmet; the self-ventilating helmet comprises only a wirelessly powered electronic management system for indoor applications; the self-ventilating helmet comprises a transparent wide-angle horizonal and downwardvertical field of view;wherein the self-ventilating helmet comprises a loose cover to provide a full protection for wearer; 2. A system according to claim 1, wherein N is greater or equal to 2.3. A system according to claim 1, comprises at least one thin-film photovoltaic cell to draw and convert direct sunlight energy into direct current electrical energy to power and charge the power sharing electronic management system, wherein the power sharing electronic management system comprises a power sharing electronic management circuit and a rechargeable battery.4. A system according to claim 3, wherein the power sharing electronic management circuit detects the presence of photovoltaic energy, wherein in the physical presence of photovoltaic cells the management circuit step-up or step-down the converted direct current electrical energy to power the fan units and charge the rechargeable battery concurrently.5. A system according to any of claim 1 to 3, wherein in the physical absence of the photovoltaic cells, the management circuit will operate only with the in-built rechargeable battery to power the fan units.6. A system according to either of the preceding claims, wherein the power sharing electronic management circuit comprises a dedicated wireless receiver and a dedicated wireless transmitter.7. A system according to claim 6, wherein the wireless receiver further comprising the step to convert the received electromagnetic field energy from an external wireless charger configuration into direct current electrical energy, wherein the external charger can be an external wall adapter powered wireless charger, to charge the rechargeable battery.8. A system according to claim 6, wherein the wireless transmitter further comprising the step to generate and transmit alternating electromagnetic field energy providing power wirelessly at ultra-short distance into the self-ventilating helmet.9. A system according to claim 8, wherein the self-ventilating helmet further comprises a dedicated wireless receiver that is configured to receive alternating electromagnetic field /0 energy and convert it to direct current electrical energy to feed into the cordless air-inlet and cordless air-outlet.10. A system according to claim 9, wherein the cordless air-inlet and cordless air-outlet are configured to be in a backward-facing position away from the self-ventilating helmet to eliminate any direct contact with forward face to face element contact, wherein the cordless air-inlet and air-outlet further comprises the configuration of detachable and movable positions along the self-ventilating helmet.11. A system according to any of claim 9 to 10, wherein the cordless air-inlet and cordless air-outlet further comprises at least 1 to N stages low-noise static pressure fans.12. A system according to claim 11, wherein the minimum 1 to N stages low-noise static pressure fan units comprises compact size fans configured in series to enhance the fan static pressure performance against a particulate filter.13. A system according to claim 12, wherein the low-noise static pressure fan performance is incremented sequentially with each additional fan configured in series of the preceding fans.14. A system of any of the preceding claims 9 to 13, wherein the cordless air-inlet comprises at least 1 to N low-noise static pressure stage fan unit which draws in external air through a removable compact size particulate filter into the self-ventilating helmet, wherein the compact particulate filter prevents external health hazardous particle elements from entering the self-ventilating helmet.15. A system according to claim 14, wherein the compact particulate filter comprises a double walled compartment where the external wall is configured to allow the compact filter to be tightened or removed from the self-ventilating helmet, wherein the internal wall houses the particulate filter and serves as an extra layer of protection to external hazardous elements from entering the self-ventilating helmet.16. A system according to any of claim 11 to 14, wherein the cordless air-outlet comprises at least 1 to N stages low-noise static pressure fans that expel the stale air and carbon Ia dioxide generated by the wearer, out of the self-ventilating helmet.17. A system according to any of claim 11 to 16, wherein the cordless air-inlet and cordless air-outlet further comprising the concurrent drawing of fresh air into and expelling of stale-air out of the self-ventilating helmet, wherein the concurrent method ensures a continuous circulation of fresh air within the self-ventilating helmet.18. A system according to the preceding claims, wherein the cordless self-ventilating helmet comprises a transparent visor to protect against face to face direct elements for the wearer, wherein the self-ventilating helmet further comprises a wide-angle horizontal and a full vertical downward view for the wearer.19. A system according to the preceding claims, wherein the cordless self-ventilating helmet comprises a detachable light-weight loose cover, wherein the light-weight loose cover is configured to allow a full protection for the wearer by a full enclosure of the head and facial area.20. A system of power sharing electronic management system, comprising the following configuration methods: fully sealed and encapsulated low-voltage electronic management circuit and a rechargeable battery; detection of the presence of an external magnetic switch to enable or disable the electronic management circuit; determining the presence of external power source being from thin-film photovoltaic cells or from an external wireless transmitter connected via a wall adapter; determining the temperature of battery during charging to ensure battery does not overcharge; LED power indicator to exhibit the level of battery power left within the circuit; emergency LED torch control in the event of an indoor power failure; magnetic shielding from electromagnetic field energy.21. A system according to claim 20, wherein the electronic management system incorporates a fully sealed and encapsulated electronic management circuit unit and rechargeable battery unit to allow the ease of cleaning and/or disinfection process, wherein the electronic management circuit operates at low voltage configuration; 22. A system according to claim 20, further comprises a method to detect the presence of a magnetic switch to enable the electronic management circuit, wherein the presence of a magnetic switch will short circuit the embedded Reed switch within the electronic management circuit so as to enable and power the electronic management circuit, wherein the removal of the magnetic switch will open circuit the Reed switch and disable the electronic management circuit.23. A system according to either of the preceding claims 20 and 22, wherein the electronic management circuit when enabled, will determine the presence of thin-film photovoltaic cell or externally powered wireless transmitter, wherein the electronic management circuit will power split the incoming electrical energy source to charge the battery and/or power up the fan units.24. A system according to claim 23, wherein the electronic management circuit monitors the temperature of the battery during charging to ensure that the battery does not overcharge or overheat, wherein the electronic management circuit further comprising the functionality of shutting down the whole system when internal system overheating is detected and resumes operation only when temperature falls below a pre-determined value.25. A system according to any of claim 20 to 23, wherein the electronic management circuit incorporates a LED power indicator to show the battery power remaining, wherein there are different colour indicators to exhibit power, wherein the electronic management circuit comprises the measurement of voltage potential drop and current sense across the battery which is then relayed to the LED power indicator.26. A system according to either of the preceding claims 20 to 25, wherein an emergency frontal LED torch is configured to illuminate the frontal vision for the wearer, in the event /0 of an indoor lighting power failure.27. A system according to any of claim 20 and 21, wherein the electronic management circuit incorporates a magnetic shielding to eliminate spurious effects of electromagnetic field energy, wherein the electromagnetic field energy operates at ultra-short distance.28. A system of the cordless air-inlet and cordless air-outlet, comprising the following configurations: detachable from the self-ventilating helmet; position of the cordless air-inlet and cordless air-outlet can be interchangeable; position of the cordless air-inlet and cordless air-outlet can be relocated along the self-ventilating helmet; built in sound damping and vibration proofing configuration.29. A system according to claim 28, wherein the cordless air-inlet and cordless air-outlet are detachable from the self-ventilating helmet, wherein said air-inlet and air-outlet allow the maintenance and changing of the fan units.30. A system according to any of claim 28 to 29, wherein the detachable cordless air-inlet unit and cordless air-outlet unit can be configured to change their default position, wherein the cordless air-inlet unit may swap position from left to right with the cordless air-outlet unit or vice versa, wherein there must be a presence of a cordless air-inlet unit and opposite cordless air-outlet unit.31. A system according to claim 30, wherein the cordless air-inlet and cordless air-outlet unit are movable along the visor geometry of the self-ventilating helmet.32. A system according to either preceding claims 28 to 31, wherein sound damping and vibration proofing materials are configured for the cordless air-inlet and cordless air-outlet to minimise fan noise and vibration to the self-ventilating helmet.33. A system to either preceding claims, comprises an exposed ear curvature self-ventilating helmet that allows external equipment to be plugged into the human operator ear.34. A respirator device configured to operate the method and/or system of any of the preceding claims.