The present invention relates to device and method to protect a user from inhaling hazardous atmospheres in particular to protect a user from infectious viruses and diseases such as COVID-19.
A respirator is a device designed to protect the wearer from inhaling hazardous atmospheres, including particulate matter such as dust and airborne microorganisms such as but not limited to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Coronavirus disease 2019 (COVID-19) is an infectious disease caused by SARS-CoV-2. The respirator device is also designed to protect the wearer from inhaling hazardous atmospheres including also hazardous fumes, vapors and gases.
There are two main categories: the air-purifying respirator in which respirable air is obtained by filtering a contaminated atmosphere, and the air-supplied respirator in which an alternate supply of breathable air is delivered. Within each category, different techniques are employed to reduce or eliminate noxious airborne contaminants.
Air-purifying respirators range from relatively inexpensive single-use, disposable face masks sometimes referred to as a dust mask to more robust reusable models with replaceable cartridges often called a gas mask.
All respirators have some type of facepiece held to the wearer's head with straps, a cloth harness, or some other method. The facepiece of the respirator covers either the entire face or the bottom half of the face including the nose and mouth. Half-face respirators can only be worn in environments where the contaminants are not toxic to the eyes or facial area. For example, someone who is painting an object with spray paint could wear a half-face respirator, but someone who works with chlorine gas would have to wear a full-face respirator. Facepieces come in many different styles and sizes, to accommodate all types of face shapes. The differences in respirator design impact the respirator assigned protection factors, i.e. the resulting degree of protection for each kind of hazard.
Most types of respirators depend upon forming a good seal between the respirator body and the face of the wearer. Fit testing procedures have been developed to ensure that the respirator is appropriate for the wearer and the wearer's donning technique is capable of creating an adequate seal.
In the United States, the National Institute for Occupational Safety and Health defines categories of particulate filters for example: N95 Filters at least 95% of airborne particles. European standard EN 143 defines the classes of particle filters that can be attached to a face mask for example P3 Filters at least 99.95% of airborne particles. European standard EN 149 defines the classes of “filtering half masks” or “filtering face pieces” (FFP), that is respirators that are entirely or substantially constructed of filtering material, for example FFP3 filters at least 99% of airborne particles.
Another technique to stop airborne viruses' transmittal, instead of filtration, is killing the airborne viruses. When it comes to airborne disinfection of viruses, one of the generic methods to kill the virus is by heat.
Another generic method to kill viruses, including Covid-19, is by exposing the virus to UV radiation.
Simultaneous application of heating and UV exposure provides synergistic effect.
It was proved that simultaneous application has strong synergistic effect in viruses inactivation rate: it is about 10 time more efficient than in separate application of both disinfection technologies.
Certain materials (for example copper, platinum nano-colloid material, and silver nano-colloid material) have been proved to kill viruses coming in physical contact with said materials.
One object of the present invention is to provide a respirator device and method that can be reusable and thus, when a worldwide pandemic disease occurs there could be less lack of single-use, disposable face masks.
Another object of the present invention is to provide a respirator device and method that is reusable and less robust.
Another object of the present invention is to provide a system and method that can be used to disinfect hazardous air using the air conditioning system in vehicles, ships, air purifier, personal air conditioner, shelter air conditioning system, filtering systems for biological laboratories and buildings.
Another object of the present invention is to provide a respirator device that uses a bi-directional disinfection process to disinfect hazardous air both coming into the user's breathing system and coming out from an infected user wearing the device.
The present invention relates to device and method to protect a wearer and its surroundings from a user inhaling and/or exhaling hazardous atmospheres in particular to protect a wearer and its surroundings from infectious diseases.
In accordance with an embodiment of the present invention there is provided a device to protect a user from inhaling hazardous atmospheres including an insulated chamber having inlet and outlet. The chamber includes air heating means and air UV radiating means. The combined operation of the air heating means and the UV radiating means is configured for disinfecting the hazardous atmospheres. A cooling means is used for cooling the disinfected hazardous atmospheres. Wherein, the cooled disinfected hazardous atmosphere is then delivered to the user's breathing system.
In accordance with an embodiment of the present invention there is provided a device to stop a user from exhaling hazardous atmospheres including an insulated chamber having inlet and outlet. The insulated chamber includes air heating means and air UV radiating means. The device further includes the use of surface elements such as said heating means coated with materials such as copper, platinum nano-colloid material, or other virus killing materials. The combined simultaneous operation of the air heating means, the UV radiating means, and the virus killing materials is configured for disinfecting the hazardous atmospheres. A cooling means is used for cooling the disinfected hazardous atmospheres. Wherein, cooling means can be placed in one or more locations for example but not limited to inside the insulated chamber, or attached to an air outlet valve thereby enabling the device to cool disinfected hazardous atmosphere both coming in to the user's breathing system or coming out of the user's breathing system.
In accordance with an embodiment of the present invention there is provided a device configured to perform a reverse operation wherein the system can operate in reverse direction: to eliminate viruses in air exhaled by an infected person.
In another aspect of the present invention there is provided a method for protecting a user from inhaling hazardous atmosphere comprising the steps of providing insulated chamber having an inlet, outlet. The insulated chamber insulates the hazardous atmosphere from a user. In the next step, the hazardous atmosphere is heated. In the next/simultaneous step, the hazardous atmosphere is exposed to UV radiation. In the next/simultaneous step, the hazardous atmosphere is exposed to virus killing materials such as copper, platinum nano-colloid material, or other virus killing materials. The step of heating and exposing the hazardous atmosphere to UV radiation and virus killing materials causes the hazardous atmosphere to be disinfected by killing any viruses. In the next step the disinfected air is cooled to a temperature suitable for the user's breathing system for example to the user current environment temperature. The cooled disinfected atmosphere is then delivered to the user's breathing system.
Surface elements of the present invention, such as but not limited to the heat exchanger element, are exposed to the air flow and can be coated by virus killing materials (for example copper, platinum nano-colloid material and silver nano-colloid material) thus enhancing the disinfection process coming in contact with the air inside the insulated chamber.
In another aspect of the present invention there is provided a method for bi-directional disinfection process of hazardous atmosphere comprising the steps of providing a filter, an insulated chamber coated with virus killing materials such as copper, platinum nano-colloid material, silver nano-colloid material, having an inlet, outlet. The incoming air goes through a filter, to the insulated chamber that insulates the hazardous atmosphere from a user. In the next step, the hazardous atmosphere is heated and Simultaneously or separately exposed to UV radiation. The step of heating and exposing the hazardous atmosphere to UV radiation in combination with the use of copper, platinum nano-colloid material or other virus killing material coated on the surface elements such as the heating element causes the hazardous atmosphere to be disinfected by killing any viruses. In the next step the disinfected air is cooled to a temperature suitable for the user's breathing system for example to the user current environment temperature. The cooled disinfected atmosphere is then delivered to the user's breathing system. Exhaled air goes to the insulated chamber that insulates the hazardous atmosphere from a user. In the next step, the hazardous atmosphere is heated and Simultaneously or separately exposed to UV radiation and to copper or platinum nano-colloid materials or other virus killing material which are coated on the surface elements such as the heating element. The step of heating and exposing the hazardous atmosphere to UV radiation in combination with the use of copper or platinum nano-colloid material or other virus killing material coated on the surface elements such as the heat exchanging element causes the hazardous atmosphere to be disinfected by killing any viruses. In the next step the disinfected air can be cooled for example to the user current environment temperature. The disinfected atmosphere is then released to the user's surroundings.
In another aspect of the present invention there is provided a method for a desktop device facing a user, delivering disinfected air to the user's facial area without having a need for the user to wear a face mask. The desktop device is protecting a user while said user is sitting for example and without limitation in a workplace, dining room, restaurant and in the plane during flight. The device of the invention treats air, kills viruses and diffuses clean disinfected air to the direction of user's head such way that a user inhales air free of viruses. One of the advantages of this aspect of the invention is that a mask is not required, and protection is provided by generating a disinfected air curtain preventing penetration of infected air to a user breathing zone.
The invention may be understood upon reading of the following detailed description of non-limiting exemplary embodiments thereof, with reference to the following drawings, in which:
The following detailed description of the invention refers to the accompanying drawings referred to above. Dimensions of components and features shown in the figures are chosen for convenience or clarity of presentation and are not necessarily shown to scale. Wherever possible, the same reference numbers will be used throughout the drawings and the following description to refer to the same and like parts.
The device and method of the present invention can be configured as a wearer mask or can be configured to be integrated in a vehicle in helmets or in a building/home air conditioning system, or as a desktop device. Referring to
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In operation, the hazardous atmosphere 142 or air travels to the main insulated chamber inlet 140. The hazardous atmosphere is then preheated in the left side fins array 160 of the HPHE 152 then the hazardous atmosphere is heated to the temperature of about 60° C. the air pass through the heater's fins array 160 designating by arrow 162. Air is disinfected by utilizing simultaneous effects of heated air by heating means 148 and UV radiation the air by UV radiating means 146. It is proved that simultaneous application of heat and UV radiation has strong synergy effect and is significantly more efficient than separate application of the mentioned means. After passing preheated air designating by arrow 162 through heater's heat sink 172 with fins plated by copper or colloid the air is heated by heating means 148 and the hot air receives UV treatment designated by arrow 164, the air is precooled by a right section of HPHE 166. The use of HPHE allows the reduction of system power consumption because some of the power applied for air heating is returned to the system and is then used for preheating of the incoming air flow. Precooled air designated by arrow 168 receives additional cooling treatment with the AHE 154 by air passing through the fins array 173 of the AHE 154. Outcoming air flow of cooled clean air is designated by arrow 170 has temperature close to ambient air temperature. All fins of the system elements, Heat Pipe Based Heat Exchanger 166, Heater, Ambient Heat Exchanger 154 can be plated by Copper or Colloid Material providing additional disinfection protection. The UV means 146 and the heating means 148 can be powered by any suitable electrical or solar energy means. In this example heating and UV radiating means is powered by a battery or through a USB connector 180. In another embodiment of the present invention device 100 includes a controller 181 that electrically controls the activation and configures the desired power intensity of the heating means 148 and the UV means 148. The desired temperature of the ambient air 170 can be adjusted by controller 181. Yet in another embodiment of the present invention device 100 may include a fan 183 for more efficiently directing the incoming infected air designated by arrow 142 to left fins array 160 of the HPHE. Yet in another embodiment of the present invention, the device 100 additionally include a tracking system to automatically track the location of the user's 100 head and direct the disinfected air towards the user's breathing area. Yet in another embodiment of the present invention all the mentioned part of device 100 can be replaceable when needed.
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The TEM 190 of the invention has fins array 198 and 196 on the both cold and hot side respectively. Heat dissipated on the hot side 196 of TEM fins array 196 is used for heating of air flow to a temperature of 60 to 100 degrees Celsius. Cooling power from the cold side of TEM fins array 198 is used for precooling of disinfected hot air flow after simultaneous heat and UV radiation treatment by the UV radiating means 146. Ambient Heat Exchanger (AHE) 154 in association with the heat exchanger fins array 200 plated by copper or colloid is used for additional cooling and disinfecting of outcoming air flow to the temperature close to ambient air temperature. Arrow 202 designates the cooled cleaned air.
Incoming infected air designated by arrow 206 is drawn by fan 208 and preheated by AHE 154. Preheated air flow designated by arrow 210 passes through the hot side TEM fins array 196 and reaches to temperature, preferably, between 60 to 100 degrees Celsius, after that the hot air passes through UV radiation zone designated by arrow 212 where it is disinfected. The clean air is precooled by TEM cold side fins array 198. Precooled air designated by arrow 214 passes through AHE 154 and reach temperature close to ambient air temperature. Use of AHE 154 allows reducing of the device power consumption by utilizing heat energy of outcoming air for preheating of incoming air flow.
All the fins TEM cold and hot sides array fins 196, 198 and Ambient Heat Exchanger array fins 200 and 220 are plated either by Copper or Colloid Material providing additional disinfection efficiency.
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It should be understood that the above description is merely exemplary and that there are various embodiments of the present invention that may be devised, mutatis mutandis, and that the features described in the above-described embodiments, and those not described herein, may be used separately or in any suitable combination; and the invention can be devised in accordance with embodiments not necessarily described above.
Filing Document | Filing Date | Country | Kind |
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PCT/IL2021/050292 | 3/16/2021 | WO |
Number | Date | Country | |
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63019441 | May 2020 | US | |
62991653 | Mar 2020 | US |