150results about How to "Low breathing resistance" patented technology

The invention discloses electret master batch for melt-blown non-woven fabric for a low-resistance mask and a preparation method of the electret master batch. The electret master batch for the melt-blown non-woven fabric for the low-resistance mask is prepared from the following components in percentage by weight: 65-85% of polypropylene resin; 1-3% of electret powder; 5-15% of a dispersant; 3-10%of a nucleating agent; 3-10% of a softening agent; 0.05%-0.5% of a processing aid; wherein the softening agent is erucyl amide; the polypropylene resin is homo-polypropylene and / or co-polypropylene,and the melt index MFI of the polypropylene resin is 230 DEG C / 2.16 kg and is not lower than 1000 g / 10 min. According to the electret master batch, the softening agent, the nucleating agent and othercomponents are added, so that when the electret master batch and the ultra-high melt index polypropylene are mixed to be used for producing the melt-blown non-woven fabric for the mask, the obtained melt-blown non-woven fabric for the mask can have low respiratory resistance while having high filtering efficiency, and therefore the electret master batch is particularly suitable for being used as amask material. The formula does not greatly adjust the formula of the existing electret master batch, and is easy to implement.

The invention discloses a preparation method of an activated carbon composite melt-blown fabric. A melt-blown melt is sprayed by using a fluidized state high-temperature high-pressure gas containing activated carbon particles as traction gas, in the process, a gas-liquid-solid three-phase mixed flow field is sprayed forwards, and finally, the melt is cooled and formed and cured in the form of a fiber mesh structure; meanwhile, activated carbon evenly adheres to and is constrained in the fiber mesh structure, and finally the stable activated carbon composite melt-blown fabric is formed. The activated carbon composite melt-blown fabric is soaked in a traditional Chinese medicine extract, so that the melt-blown fabric has the effects of sterilizing, disinfecting, respiratory tract resistanceimprovement, odor freshening and the like. The invention also discloses the activated carbon composite melt-blown fabric obtained through the preparation method and a mask using the activated carbon composite melt-blown fabric. The filtering, sterilizing and protecting effects are good.

The invention relates to a gas mixing device (10) for an air-way management system. The device has an elongated chamber (C) with a first gas inlet port (1P) being arranged for intake of atmospheric air (AA) into the chamber, the first inlet port being positioned at an end section of the internal chamber. Further, a second gas inlet port (2P) is arranged for intake of a gas (G) into the chamber (C), the second gas inlet port having an injector (INJ) from which the gas can exit into the chamber with an injection direction (ID), the injection direction having a projection (ID_proj) being oppositely directed relative to an in-flow direction (F) of the first gas inlet port (1P) so as to provide mixing of the atmospheric air and the gas. Opposite the first gas inlet port (1P) there is a breathing port (3P) for allowing an individual to breathe through the gas mixing device. The device is beneficial in that the breathing resistance is relatively low while the device simultaneously provides a sufficient gas mixing of the gasses to be mixed. Additionally, the invention provides a relatively compact gas mixing device which facilitates easy integration into e.g. a respiration mask for measurements of respiratory parameter of an individual e.g. a patient.

The invention relates to an air purifier, which comprises a purifying main body, one side of the purifying main body is provided with an air inlet, a filter and a fan are arranged sequentially along an air flow path in the purifying main body, and the entire purifying main body is covered by the filter; the purifying main body is provided with an air passage at a position corresponding to the fan; the air passage is communicated with an air outlet formed in one side of the purifying main body; a flow guide plate for air flow is arranged at one side of the fan, the flow guide plate is divided by ribs, and the ribs are in contact with the filter. The air purifier is small in size and lightweight, and therefore is convenient to carry, the air supply and filtering power is high, active air supply is adopted, breathing resistance is low, and the air purifier is comfortable.

The invention belongs to the technical field of ultrafiltration materials and sanitary protection, and particularly relates to a novel dustproof, antibacterial and antiviral nano-fiber mask. The maskcomprises a mask main body, and is characterized in that the mask main body sequentially comprises a non-woven fabric layer, a multi-layer drug-carrying composite fiber membrane layer and a non-wovenfabric layer from inside to outside, wherein the multi-layer drug-carrying composite fiber membrane layer comprises at least three layers, the inner layer and the outer layer are melt blown layers orelectrostatic spun fiber membrane layers, and the middle layer is a loaded drug-carrying nano microsphere fiber membrane layer. The multi-layer drug-carrying composite fiber membrane layer used in themask can enhance the slow-release performance and the anti-virus and antibacterial properties of a drug through multiple mesoporous structures formed by drug-carrying nano microspheres and differentmaterials, the function of filtering particles and smell in air is enhanced, and the mask has relatively strong killing and inhibiting effects on public health safety, respiratory systems and infectious viruses.

The invention provides an active intake mask. The active intake mask comprises a mask body, and a filter and active intake assembly arranged on the mask body, wherein the mask body includes an elastic surface layer, a one-way exhaust layer and a replaceable liner arranged in the thickness direction in sequence from outside to inside; sealing rings are respectively arranged on the upper and lower two sides of the mask body, and are fixed in strip-shaped grooves formed between the one-way exhaust layer and the liner; and the filter and active intake assembly includes an outer shell, a base, and an activated carbon filter screen, a Haipa filter screen, a fan and an energy module arranged in the mask thickness direction in sequence from outside to inside. The mask realizes active intake of purified clean air through the filter and active intake assembly, realizes smooth exhaust of exhaled air through the one-way exhaust layer, and improves the user experience of wearers.

The invention relates to an isolation type chemical oxygen self rescuer comprising a seal housing, a respiratory system, an oxygen candle, a drug tank and an airbag. The respiratory system and the oxygen candle are communicated with the top of the drug tank, the airbag is communicated with the bottom of the drug tank, and the respiratory system, the oxygen candle, the drug tank and the airbag are placed in an accommodating space of the seal housing. The self rescuer is a 45 min one, the drug capacity, the entire size and the size of the drug tank are researched comprehensively, so that the device is capable of meeting the requirements of 45 min respiratory capacity and time through the minimum size; aiming to improve the tightness performance of the device, the upper and lower cover sealing manner, airbag manufacturing process and connection process of various ventilation components are optimized, so that the tightness performance of the device is improved, and the safety is higher.

The invention provides an efficient oxygen-generation and air stagnation prevention chemical oxygen fire-fighting self-rescue respirator with a cooling layer. The chemical oxygen fire-fighting self-rescue respirator comprises a mask (1), a breathing cover (2), an oxygen-generation tank (3) and an airbag (6), and is characterized in that the breathing cover is arranged on the mask and is connected with an opening of the airbag; an expiration one-way valve and an inspiration one-way valve are arranged at the connecting position of the breathing cover and the airbag; the oxygen-generation tank is arranged in the airbag, and an air inlet in the top of the oxygen-generation tank is connected with the breathing cover through the expiration one-way valve; meanwhile an air guide tube is connected with an air outlet in the bottom of the oxygen-generation tank. According to the self-rescue respirator, the oxygen-generation tank is arranged in the airbag, the airbag is effectively prevented from being wrinkled or adhered, and the air stagnation phenomenon is completely eradicated; a flow channel subdivision staggered fin type cooling structure is adopted in the oxygen-generation tank, the problem that the reaction in a medicament layer is uneven and the cooling problem are effectively solved, and meanwhile the temperature of generated oxygen is effectively lowered through the arrangement of a supporting heat conduction separation plate, a heat isolation layer and the air guide tube.

The invention provides long-acting electret PP non-woven fabric. The long-acting electret PP non-woven fabric is mainly prepared from the following components in parts by weight: 30 to 35 parts of electret master batch, 36 to 44 parts of melt-blown polypropylene, 8 to 17 parts of surface-treated silicon dioxide, 3 to 5 parts of polyvinylidene fluoride, 5 to 7 parts of polytetrafluoroethylene and 3to 5 parts of PFA. According to the long-acting electret PP non-woven fabric and the preparation method thereof provided by the invention, after the non-woven fabric is treated by an electret process, the filtering performance and charge storage performance of fibers are greatly improved, the high temperature resistance and high humidity resistance of the non-woven fabric are effectively improved, meanwhile, the hydrophobic and oleophobic properties of the fibers are also improved, and the service life is prolonged. In addition, the long-acting electret non-woven fabric also has the functionsof antibiosis, disinfection, deodorization and the like.

The invention discloses a bubble bag type positive pressure medical protective clothing. The bubble bag type positive pressure medical protective clothing is an integral body formed by connecting a window sealing hood, an upper outer garment and trousers, cuffs and trouser legs are tightened and sealed, an access is longitudinally formed in the middle of the front part of the protective clothing,zippers are arranged inside and Velcro strips are arranged outside for opening and sealing, a back (waist) hanging portable air purification fan system is matched, the protective clothing is formed bysequentially compounding a protective layer, an air bag layer and a lining layer from outside to inside, a complete protective clothing air supply and exhaust system is formed by a carry-on fan air inlet and outlet pipe, longitudinal and transverse air channels formed by air bubbles in the air bag layer at intervals, and micro air inlet holes in the lining layer and a protective clothing one-wayexhaust valve, so purified air is effectively conveyed into the protective clothing, and carbon dioxide, sweat steam, heat and hood window water mist generated by medical personnel are discharged outof a body, the problems of poor heat dissipation, mask tightening pain, window fogging, chest distress and oxygen deficit of the existing protective clothing are effectively solved, and the wearing feeling of the medical personnel is well improved.

The invention relates to the field of haze prevention and control, in particular to a portable dust removing device which comprises a shell body. An air inlet pipe is communicated with the lower portion of the shell body. The upper portion of the shell body is communicated with a face mask through a connecting pipe. Liquid is arranged in the shell body. A gaseous phase labyrinth is arranged in a shell body inner cavity. The gaseous phase labyrinth is provided with an adsorption layer at least on a windward face. The arranged gaseous phase labyrinth is matched with the adsorption layer, the gaseous phase labyrinth lengthens an air path, meanwhile, air is turned by multiple times, through centrifugal force generated by turning, dust in air is in contact with the adsorption layer and is adsorbed by the adsorption layer, and accordingly dust and small particles in air are reduced. The principles are different from a filtering principle and a spraying principle in the prior art, compared with the filtering principle, the portable dust removing device is small in respiratory resistance, normal respiration can hardly be affected, by replacing liquid in the shell body, sediment is discharged, continues using can be achieved, using cost is low, and environment pollution can be avoided. Compared with the spraying principle, a power supply and a pump are of no need, using cost is lowered, and noise is removed.

The invention provides a double-air-chamber one-way airflow filter bag type dustproof respirator composed of a main mask with double air chambers, a sealing gasket, inhalation valves, an exhalation valve, a filter bag, a jacket and a head band. The middle part of the main mask with double air chambers is provided with a partition plate for partitioning an inside space into an upper air chamber and a lower air chamber which are independent; the outer wall of the upper air chamber is provided with the exhalation valve; two sides of the outer wall of the lower air chamber are respectively provided with one of the inhalation valves; a one-way airflow is formed by means of the one-way characteristic of the inhalation valves and the exhalation valve. The sealing gasket is adopted at the part where the main mask with the double air chambers is in contact with the face of a person, and the filter bag is respectively connected with the inhalation valves. The main mask with the double air chambers is provided with the exhalation valve, the inhalation valves, the filter bag and the sealing gasket to form an assembly, and then, the assembly is arranged in the jacket matched with the head band to form the whole respirator. The double-air-chamber one-way airflow filter bag type dustproof respirator is small in respiration resistance, free of dead spaces, incapable of inhaling waste gas and peculiar smell, extremely low in leakage rate, low in use cost, small in size, attractive in appearance and suitable for wearing in daily life.

The invention discloses a mask capable of automatically adjusting breathing. The mask comprises a mask body (1) and a head band (2), wherein an exhalation valve seat (11) is arranged on the upper part of the mask body (1), an exhalation valve sheet (3) is installed on the exhalation valve seat (11), and a magnet sheet (12) is arranged at the outer end of the exhalation valve sheet (3); a control circuit board (4) is installed on the upper part of the mask body (1); and an integrated Hall sensor composed of a Hall semiconductor component and an accessory circuit thereof is arranged on the upper part of the control circuit board (4), and the magnet sheet (12) moves with the expiration valve sheet (3) to be away from or close to the Hall semiconductor component. The mask capable of realizing automatic breathing and electric air supply, which is disclosed by the invention, has portability of a self-breathing filtering respirator, and comfort (effectively reducing inhalation resistance and exhalation resistance). After actual measurement, the exhalation resistance is 51Pa, the inhalation resistance is 95Pa, and the allowances are high compared with the inhalation resistance of not greater than 350Pa and the exhalation resistance of not greater than 250Pa, which are stipulated by the national standards.

The present invention relates to a forced respiration filtering method for gauze mask, and multiple functional mask using same method. In order to solve the problem that the existing gauze mask has big breathing resistance and weak filtering ability, the gauze mask includes filtering layer and chalaza, the filtering layer consists of lateral uniform filtering layer, medial uniform filtering layer and adjusting material between the two layers, the adjusting material is the transposable type three-dimensional net or transposable type stent to increase the efficient filtering acreage of the filtering layer; between the mount and the nostril periphery on the opening of the filtering layer, there is guiding cycle which is used to make the peripheral edge close the face or closed-end guiding cycle which is used to make the peripheral edge close the face and provide active spaces. Thus, this gauze mask possesses the advantage of simple structure, manufacture easily, use conveniently, large effect filtering area, strong filtering ability, small respiratory resistance, excellent anti-infect performance, wide application field, low cost, wide extension application prospect.

The invention relates to an electret master batch as well as a preparation method and application thereof. The electret master batch is prepared from the following raw materials in percentage by mass: 50%-80% of polypropylene resin, 3%-5% of an antibacterial agent, 5%-15% of an electret and 0.05%-36.5% of an auxiliary agent. The antibacterial agent is added into the electret master batch, and the antibacterial agent and the electret in a specific ratio have a synergistic effect, so that the electret master batch has an antibacterial effect while having relatively high filtering efficiency and relatively low respiratory resistance. Particularly, air mixed with viruses can be effectively filtered, and the viruses are prevented from passing through.

The invention relates to a protection-type gauze mask. The protection-type gauze mask comprises a gauze mask body, ear bands and a breather valve arranged on the gauze mask body, and the gauze mask body comprises a face layer, a bottom layer and a filter layer sandwiched between the face layer and the bottom layer. The protection-type gauze mask has the advantages that when a wearer uses the protection-type gauze mask, the breathing resistance is small, breathing is smoother, and the comfort degree of the wearer is improved.

The invention relates to the technical field of haze-proof articles and provides an external ventilation type haze-proof mask with a large ventilation section. The external ventilation type haze-proof mask comprises a breathing mask main body, a first air filtering module and a second air filtering module, wherein the breathing mask main body is provided with a breathing cavity; an air outlet of the first air filtering module is communicated with an air inlet of a left inhaling channel through a first hose; the air outlet of the second air filtering module is communicated with the air inlet of a right inhaling channel through a second hose; the air outlet of the left inhaling channel and the air outlet of the right inhaling channel are communicated with the breathing cavity through inhaling check valves respectively; and an exhaling channel is communicated with the breathing cavity through an exhaling check valve. The external ventilation type haze-proof mask with a large ventilation section is reasonable and compact in structure; the special modules are used for filtering air; the first air filtering module and the second air filtering module are fitted to cheek parts of a human body respectively; the external ventilation type haze-proof mask is comfort to wear, the ventilation section is greatly enlarged, the air filtering quantity is large and the breathing resistance is small; and the external ventilation type haze-proof mask is suitable for wearing outdoors for long time, and has the characteristics of safety, labor saving, simplicity and convenience and high efficiency.

The invention discloses a magnetic-electric air purifying mask which comprises a magnetic-electric air filtering unit which uses electromagnetic fields for filtering and a mask base frame. A breathing window is formed in the middle of the mask base frame. The magnetic-electric air filtering unit is mounted in the breathing window and comprises a conductive mesh, a conductive induction mesh, a magnetic induction coil and an induction mesh. A power supply is mounted in the mask base frame. An anode output end of the power supply is connected with the conductive mesh, a first end of the magnetic induction coil, and the induction mesh. A cathode output end of the power supply is connected with the conductive induction mesh and a section end of the magnetic induction coil. By the electromagnetic fields in the magnetic-electric air filtering unit, fine dust of the entering air is charged and coagulated, and the coagulated dust is filtered to purify the air. In addition, the magnetic-electric air purifying mask is low in breathing resistance, and widely applicable to masks, and smooth breathing of a wearer is guaranteed.

The invention provides an electric portable dust removing device, and relates to the field of haze prevention and control. The electric portable dust removing device comprises a shell, an air inlet pipe is communicated with the lower portion of the shell, the upper portion of the shell is provided with an exhaust opening used for being connected with a mask, liquid is arranged in the shell, a gas phase maze is arranged in an inner cavity of the shell, and the gas phase maze is provided with an absorbing layer at least on the windward face; an air inlet of the air inlet pipe is immersed into the liquid; the air inlet of the air inlet pipe or the air inlet pipe is provided with a one-way valve preventing the liquid from flowing back; a pressure sensor is arranged behind the one-way valve, an air supplement pump is further arranged, the inlet of the air supplement pump is communicated with the atmosphere, and the outlet of the air supplement pump is communicated with the inner cavity of the shell behind the one-way valve. Due to matching of the gas phase maze and the absorbing layer, dust and fine particles in the air are reduced; by means of the adoption of combination of the pressure sensor and the air supplement pump, pressure can be automatically increased according to breaths of a user, and accordingly breath resistance hardly exists.

The invention discloses a mask. The mask comprises a filter element and an outer cover. The filter element at least covers the mouth and the nose of a user to filter air breathed by the user, the outer cover covers the filter element to support and protect the filter element, the outer cover is a superfine-fiber hot-press-formed piece, and a plurality of through air holes are formed in the outer cover. According to the mask, as the outer cover is the superfine-fiber hot-press-formed piece, the mask can have good three-dimensional forming performance, good flexibility, good supporting performance and good memory performance; as the air holes are formed in the outer cover, a more effective air channel can be formed in the outer cover, breathing resistance is reduced, the air permeability of the mask is improved, and breathing of the user is smooth. In addition, as the filter element is arranged inside the outer cover of the mask, the double-layer protection structure is formed, and under the condition that the good air permeability of the mask is guaranteed by the outer cover, the good filterability of the mask can be guaranteed through the filter element.

The invention relates to an oxygen inhalation method and device which lead a person in a non-ill condition to inhale oxygen under special circumstances such as gas defense, highlands, oxygen deficiency self-rescuing and the like. The oxygen inhalation method comprises the following steps of: opening an oxygen switch when oxygen is needed to be inhaled so as to put oxygen stored in an oxygen inhalation pipe into an oral cavity, and simultaneously inhaling oxygen through the oral cavity; closing the oxygen switch when oxygen is not needed, and storing the oxygen in the oxygen inhalation pipe; and discharging exhaled gases from a body through the oral cavity. A preferential oxygen inhalation method is characterized in that the oxygen switch is formed by biting the oxygen inhalation pipe with upper teeth and lower teeth and is controlled by the upper teeth and the lower teeth. The device for realizing the method comprises an oxygen source device, an oxygen flow adjusting device and an oxygen inhalation device, wherein the oxygen inhalation device comprises the oxygen inhalation pipe and the air switch which is arranged to be close to the tail end of the oxygen inhalation pipe to the greatest extent. The oxygen inhalation method and device provided by the invention have the advantages that oxygen inhalation concentration is high, breathing resistance is small, few oxygen is wasted, and the person inhaling the oxygen feel comfortable and pleasant, and particularly meet the requirements for oxygen inhalation under the special circumstances and in the movement states.

The invention relates to a novel antibacterial far infrared mask which comprises an inner layer of anion fibers, a middle layer of N95 filter materials and an outer layer of antibacterial fibers, wherein the upper part of the middle layer of the N95 filter materials is provided with the outer layer of the antibacterial fibers, while the lower part of the middle layer of the N95 filter materials is provided with the inner layer of the anion fibers; and the inner layer of the anion fibers, the middle layer of the N95 filter materials and the outer layer of the antibacterial fibers are pressed and compounded. The mask at least has the following advantages of small breathing resistance, light weight, sanitary wearing and convenience for maintenance. In the invention, the middle layer is made of the N95 filter materials and can be used for efficiently filtering out various powders, bacteria and germs in the air; the inner layer is made of the negative oxygen ion fibers containing 4,400 negative oxygen ions / cubic centimeter and can be used for increasing the oxygen content, and after being used for a long term, the mask is not stifling and oppressed, and the oxygen content is high; and the outer layer is made of the antibacterial fibers and can be used for effectively stopping bacteria and germs from migrating and penetrating through fiber air gaps, meanwhile, the purpose of killing bacteria and germs can be achieved through breaking the metabolism of bacteria.

The invention relates to a simple wearable filtering positive-pressure ventilation device. The simple wearable filtering positive-pressure ventilation device is characterized in that the simple wearable filtering positive-pressure ventilation device mainly comprises a gas generating component, a filtering component, a positive pressure collecting component and a protective equipment interface component; the gas generating component comprises a shoe-shaped pedal type plastic air pump and a unidirectional air inlet / air outlet valve (hole); the filtering component comprises a 3M-level filtering fabric and an anti-deformation plastic negative pressure pipe; the positive pressure collecting component comprises a gas input valve (access hole), an elastic air bag, a filtering element, a positivepressure gas output element and a pressure sensitive element; the protective equipment interface component comprises a positive pressure output interface, and the positive pressure output interface can abut against a poison preventing mask, a protective head cover and a sealing protective garment; by means of the simple wearable filtering positive-pressure ventilation device, external air can be introduced into the air bag for storage through walking or stepping, and particulate matters and harmful gas in the air are blocked by the filtering element; three layers of dirt-preventing filtering fabrics are arranged in the air bag, the pressure of the air bag is kept by a pressure reducing valve, and the air bag is combined with protective equipment to supply breathing cleaning air.

The invention discloses a polylactic acid electrostatic spinning / acetate fiber needle-punched composite filter material and a preparation method thereof. Polylactic acid is used as a raw material andis prepared into polylactic acid nanofibers through electrostatic spinning and the polylactic acid nanofibers are deposited on the surface of an acetate fiber needle-punched non-woven material. The preparation method comprises the following steps: (1) accurately weighing polylactic acid particles and dissolving in a mixed solvent of acetone and N,N-dimethylformamide according to the volume ratio of 5 to 1; stirring for 2 to 4h to form an electrostatic spinning solution; fixing an acetate fiber needle-punched non-woven fabric on an electrostatic spinning receiving device; pouring the electrostatic spinning solution into an injector and keeping a spinning nozzle and the center of a receiving device on the same horizontal line; adjusting a flow speed, a receiving distance and spinning voltage; after spinning for 40 to 80min, forming a polylactic acid / acetate fiber composite filter material; and (3) drying the polylactic acid / acetate fiber composite filter material in a drying oven at thetemperature of 40 to 60 DEG C to obtain the polylactic acid electrostatic spinning / acetate fiber needle-punched composite filter material. The polylactic acid electrostatic spinning / acetate fiber needle-punched composite filter material has the advantages that the filtering efficiency of needle-punched materials can be remarkably improved, and relatively low respiratory resistance is ensured, so that an efficient and low-resistance air filtering material is prepared.

The invention relates to an industrial hemp fiber protective mask, belonging to the technical field of daily protective products. The industrial hemp fiber protective mask comprises a supporting layer, a hemp nanofiber layer, a hemp fiber antibacterial layer and a nanometer supporting layer, wherein the four layers are compounded through an ultrasonic bonding method. Besides a mask body, the industrial hemp fiber protective mask further comprises ear bands on the two sides of the mask body, wherein protective strips are arranged at the ends of the left side and the right side of the mask bodyrespectively, and when the mask is worn, the protective strips can be attached to the cheeks of a human body. The industrial hemp fiber protective mask has the advantages that bacteria and fine particles in air can be effectively and efficiently filtered, respiratory resistance is low, the hemp fiber antibacterial layer can effectively inhibit or kill bacteria, germs and the like in the air, bacterium breeding in the mask can be effectively inhibited, the peculiar smell of the mask is reduced, and skin cannot be irritated when the industrial hemp fiber protective mask is used.

The invention discloses a chemical oxygen self-rescuer which comprises a breathing component, an oxygen generation component and an air bag which are sequentially communicated. The oxygen generation component comprises an oxygen generation medicine tank, an air discharging valve and an oxygen candle, the air discharging valve is arranged on a component position above oxygen generation medicines inthe oxygen generation medicine tank and below a breathing end of the breathing component, opening and closing of the air discharging valve are controlled by air inflation volume of the air bag, a cooling component and the oxygen generation medicines are arranged in the oxygen generation medicine tank, the cooling component comprises a vent pipe and a cooling frame, the vent pipe is communicated with the breathing component and the oxygen generation medicine tank, the cooling frame is arranged in the oxygen generation medicine tank, the oxygen generation medicine tank is divided into a plurality of containing spaces for placing the oxygen generation medicine by the vent pipe and the cooling frame, the breathing resistance and the temperature of breathing gas are reduced, and the utilization rate of the oxygen generation medicines is increased.

The invention belongs to mine personal protection type portable instruments and equipment, and relates to a mining dust filtration and air supply type dustproof mask. The mask comprises a breathing mask, a head tying belt, a main machine and a filter, wherein a breathing mask covers the mouth and nose of a user, a breathing exchange space is formed between the breathing mask and the mouth and noseof the user, the head tying belt is connected to the breathing mask, the head tying belt assists the breathing mask in covering the mouth and nose of the user in the mode of being fixed to the head and the shoulder and neck of the user, a main body of the main machine is of a tubular structure, a micro fan is arranged in the main machine, the filter is connected to one end of the tubular structure of the main body of the main machine, the main machine and the filter form an assembly body with a tubular main body, the assembly body is connected with the breathing mask to enable the breathing exchange space to communicate with the interior of a main body pipe of the assembly body, the assembly body is lapped on the shoulder and neck of the user, and outside air is driven by the micro fan toenter the main machine through the filter. The dustproof mask actively supplies air and is portable and efficient. The invention also provides a testing method of the dustproof mask.

The invention discloses a stereo mask comprising a body and elastic ear bands on two sides of the body. The body is in the stereo structure formed by compressing a left portion and a right portion. An inner layer of the body and an outer layer of the body are both made of non-woven fabric. The body comprises an outer non-woven fabric layer, an efficient filtering layer, an anti-bacteria layer and an inner non-woven fabric layer which are integrated from outside to inside. According to the arrangement, the anti-bacteria layer is arranged on the inner layer to avoid stimulation and sensitization to human body; by the aid of fold-line creases arranged in the efficient filtering layer, airflow velocity is reduced, and accordingly filtering efficiency is increased; due to the stereo structure, the nose of the user doesn't directly contact the mask, thus avoiding stuffiness; bacteria, flu and PM 2.5 are isolated.

The invention discloses a producing method of a natural mineral absorbing and filtering oronasal respirator. The point of the technic proposal is that the producing method of the natural mineral absorbing and filtering oronasal respirator is that: choosing natural mineral absorbing and filtering agent as the raw material of the natural mineral absorbing and filtering oronasal respirator; moistening the agent and pressing into an oronasal respirator roughcast with an arc plate-shaped solid formation; then airing, baking and drilling the oronasal respirator and finally packing the oronasal respirator to a finished product. With good dust resisting effect, the natural mineral absorbing and filtering oronasal respirator can effectively absorb the soot smaller than 5 micron, the toxic gas and the harmful bug, which prevents the soot, the toxic gas and the harmful bug from being directly absorbed into the alveolus so as to guarantee the body health of the user. The natural mineral absorbing and filtering oronasal respirator is characterized by small respiration resistance, light weight and peculiar smell absorption, which can be used repeatedly after being disinfected and dried. The invention is suitable for producing the semi-ellipse bowl-shaped absorbing and filtering oronasal respirator.