105 results about "Indoor air pollutants" patented technology

Methods and apparatus for determining indoor air contaminant levels independent of outdoor contaminant levels. In one embodiment, an infinite geometric series is used to compute a true indoor air contaminant level in a room.

The invention relates to a nanometer negative ion environmental-protection coating, which is characterized by being prepared from the following components in parts by weight: 10 to 30 parts of emulsion, 10 to 50 parts of deionized water, 1 to 5 parts of negative ion additive, 15 to 25 parts of titanium dioxide, 0.5 to 5 parts of accessory ingredient, and 1 to 15 parts of filler. When being coated in any indoor site, the nanometer negative ion environmental-protection coating not only achieves a decorative effect, but also can durably and effectively adsorb indoor air pollutants, releases a large number of negative oxygen ions at the same time for cleaning air, and builds a healthy environment of a natural air anion bar indoors completely for comprehensively caring life health of people. The nanometer negative ion environmental-protection coating provided by the invention is beneficial to durably improving the indoor environment, purifying indoor air, bacterium-resisting, disinfecting, purifying volatile organic cancerogens such as formaldehyde, methylbenzene, benzene, sulphur and ammonia indoors, and removing peculiar smells such as stinks, musty taste and smoke flavor; can durably release the negative oxygen ions for building the natural air anion bar indoors, and has a health-care effect for making people healthier; can effectively adsorb for a long time and settle particulate pollution of PM2.5 (Particulate Matter2.5) entering indoor from outdoor so as to enable people to escape from an outdoor haze air environment.

An air quality control for central air conditioning system consists of an air conditioning set, rooms, ventilating valves, fresh-air valves, an oxygen-producing unit, air-purifying unit, a transducer, and an oxygen detector. Air is treated to be suitable temperature and moisture, mixed with oxygen and then provided into rooms. The oxygen plants may be PSA, VSA, and VPSA pressure varied adsorbing plants and membrane separation style oxygen plants to produce 30 - 40% oxygen. The system can keep normal value of oxygen concentration in air of rooms, and reduce pollutants.

The invention relates to a method for applying a gold hydroxyapatite loaded catalyst to catalytic oxidation reaction of formaldehyde at room temperature, belonging to the technical field of indoor air purification. The method is characterized by comprising the following steps: by taking calcium nitrate and diammonium hydrogen phosphate as precursors, obtaining hydroxyapatite by a liquid deposition method; by taking chloroauric acid as a precursor and the hydroxyapatite as a carrier, preparing the gold hydroxyapatite loaded catalyst by an urea homogeneous precipitation method, wherein the percentage by weight of Au is 0.1%-10%; and carrying out the reaction of removing formaldehyde by catalytic oxidation in a reactor, and passing formaldehyde gas through a gold hydroxyapatite loaded catalyst bed layer, wherein the reaction temperature is ranged from -15 DEG C to 25 DEG C. The method provided by the invention has the beneficial effects that formaldehyde pollutants are oxidized to CO2 and H2O at room temperature without complex operations such as temperature rising and heating. The method satisfies the actual using demands on indoor air purification, and has a wide application prospect in the field of indoor air pollutant purification.

The invention discloses a purifying and regulating system for dual monitoring of indoor air and outdoor air. The system comprises a ventilating and purifying device, a window opener and a control module thereof, monitoring devices, a state display and control device and a central controller; when the indoor monitoring device monitors that one or more values of pollutant in indoor air exceed a preset threshold valve, the central controller starts a fan after receiving the information, so as to feed purified air into a room; when the outdoor monitoring device monitors that one or more values of pollutant in ambient air exceed a preset threshold valve, the central controller sends a command for closing a window to the control module of the window opener. The system purifies and ventilates air by simultaneously monitoring indoor air and outdoor air, ensures that the content of indoor pollutant is below a preset threshold valve, solves the problem that the traditional air purifying system cannot effectively isolate outdoor air pollution, and provides a reliable guarantee for cleaned indoor air.

The invention provides a fresh air and indoor air purification integrated device. The device comprises an outdoor air purification chamber and an indoor circulating air purification chamber which are arranged in parallel; a fan is arranged on one sides, away from an air inlet, of the outdoor air purification chamber and the indoor circulating air purification chamber; a high-voltage electrostatic dust collector, an ozone catalyst layer and a heat exchanger are arranged in an air inlet of the outdoor air purification chamber in sequence; a high-voltage electrostatic dust collector, a high-powered ultraviolet lamp and a photocatalysis layer are arranged in an air inlet of the indoor circulating air purification chamber in sequence. Aiming at the differences of characteristics such as the kind and the concentration of outdoor and indoor air pollutants, the problems that traditional air purification functions are simple and not thorough in degradation, and secondary pollution exists are solved by flexibly adopting purification methods, and the function that a catalytic material catalyzes the typical pollutant formaldehyde in an oxidizing chamber at the normal temperature is sufficiently utilized; and in addition, the efficient mineralization effect of catalytic ozonation can be utilized, ozone resource wasting is avoided, indoor oxygen aeration is achieved, and the fresh air and indoor air purification integrated device can be widely applied to the indoor air purification field.

The invention provides a catalyst for purifying indoor air and a preparation method thereof. The compositions of the catalyst comprise: Pt is loaded on Al2O3 or a composite carrier of TiO2 and Al2O3; metal oxide such as MnO2 is taken as an auxiliary agent; and the catalyst is used for a novel indoor air purification device. The purification device comprises a shell, a control system, an induced draught system, an adsorption system and a catalytic combustion system. The purification device breaks through the prior mode of purifying the indoor air by replacing an adsorbent, organically combines the adsorption system and the catalytic combustion system, converts harmful substances into harmless CO2 and H2O, and forms an effective air purification system. The catalyst has high catalytic efficiency; the preparation method is simple; and after the device is operated in a 50m<3> room with the formaldehyde concentration of 1.4 mg / m<3> for 24 hours, the formaldehyde concentration of the room is 0.06 mg / m<3> when detected by a phenol reagent method and is lower than the national indoor air pollutant standard, namely 0.10 mg / m<3>.

The invention provides a combined device for gas cleaning with filled ball carrying nanometer titanium oxide. Sais device comprises shell, the side face of shell is equipped with air inlet, the middle part is provided with ultraviolet lamp, bottom is equipped with clean air outlet, and the place between shell and ultraviolet lamp is filled with glass bead coated with nanometer titanium oxide. The invention combines photocatalytic oxidation with absorption and filtering to clean room air, the device can be used in room air cleaner to increase clearance of pollutant in air. The device is mainly used for room air cleaning, especially clearing organic chemical matter caused by room finishing.

The invention relates to a multifunctional high-efficiency integrated air pollution processing material and a preparation technology thereof, which belong to the technical field of normal temperature adsorption catalysis and air cleaning. The multifunctional high-efficiency integrated air pollution processing material is composed of an active carbon carrier with high specific surface area, a titania nano-tubes catalysis component, a nano non-precious metals catalysis component, a nano precious metals catalysis component and a high efficiency antibiosis component. The material has rapid removing and killing efficacy for common air pollutant such as benzene, toluene, VOCs, formaldehyde, CO, SO2, NO2 and bacteria, and can satisfy the requirement of removal of various indoor air pollutants with high efficiency under real environment.

The invention discloses a room temperature formaldehyde catalytic material and a preparation method thereof. The preparation method includes: subjecting formaldehyde removal functional powder, a molecular sieve, a structural bonding assistant, a structural lubricating assistant and deionized water to material mixing, kneading, extrusion forming, drying and roasting, thus obtaining the cylindrical particle room temperature formaldehyde catalytic material. The room temperature formaldehyde catalytic material provided by the invention converts indoor air pollutant formaldehyde into harmless water and carbon dioxide under the catalytic oxidation effect of a purification material, and does not produce secondary pollution. Under room temperature conditions, the formaldehyde catalytic material has a good purification effect on high concentration and low concentration formaldehyde, and a 1h formaldehyde purifying rate can reach more than 98%. In addition, the room temperature formaldehyde catalytic material also has good efficacy of purifying ammonia and hydrogen sulfide and removing peculiar smell, is convenient to use, and the preparation process is simple and is easy to operate, and the needed raw materials have stable properties and are environment-friendly, and do not cause environmental pollution.

The invention relates to a preparation method of a quartz crystal microbalance (QCM) formaldehyde sensor based on amino-functionalized SBA-15, belonging to the technical fields of sensitive materials and gas sensors. By first using functionalized SBA-15 as the sensitive material of the QCM mass type sensor to construct the formaldehyde sensor having favorable performance, the preparation method comprises the following steps: carrying out ultrasonic dispersion on self-prepared beta-carboxyl ethyl trimethoxysilane functionalized SBA-15 of which the pore diameter is 2-50 nm in a certain medium for 20-50 minutes to obtain a coating liquid, wherein the used medium is any one of water, acetone or ethanol; and uniformly spreading the coating liquid on the electrode surface of a cleaned quartz crystal microbalance, and drying at 80-120 DEG C for 3-8 hours to obtain the formaldehyde sensor. The mass type sensor has sensitive response to indoor air pollutant gaseous formaldehyde (the lower detection limit can reach the ppm level), and has the advantages of good selectivity, high stability, economy and environmental friendliness. Thus, the invention provides a favorable formaldehyde sensitive material for QCM and opens up a new application area for functionalized SBA-15.

The invention provides a method for monitoring indoor air pollution and controlling air exchange. The method is applicable to a ventilation system comprising at least two sensors, a signal processing module and an air exchange control module, and takes a time T as a detection period to circularly detect the ventilation system. The method comprises the following steps: acquiring sensing data in the first detection period, transmitting the acquired sensing data to the signal processing module to process the sensing data, obtaining a first air pollution scale value, judging the indoor air condition, obtaining a first air exchange amount to exchange air at the first air exchange volume; acquiring sensing data in the Nth detection period, transmitting the acquired sensing data to the signal processing module to process sensing data, obtaining the Nth air pollution scale value, judging whether the air pollutant concentration is reduced or not, obtaining Nth air exchange volume to exchange air at the Nth air exchange volume, and circularly executing the Nth+1 detection period. The method can monitor the indoor air pollution condition comprehensively, automatically adjust the air exchange volume in time, and reduce the air pollutant diffusion.

The invention discloses an indoor environment comfort level intelligent adjusting system based on edge computing. The indoor environment comfort level intelligent adjusting system comprises an environment data acquisition module, an edge equipment module, an environment adjustment execution module, a cloud platform management module and a mobile terminal module, and intelligent adjustment of the indoor environment comfort level can be achieved so that the optimal comfort level of a human body can be achieved. The indoor environment air quality is automatically improved, the indoor air pollutant concentration is reduced, the indoor environment comfort level is improved, the problems that in the prior art, the intelligent degree is low and the function is simplex in the indoor environment adjusting process are solved, and meanwhile energy consumption of the intelligent adjusting system is reduced. In addition, the computing task is processed through local edge computing, the delay of a computing system is reduced, the data transmission bandwidth is reduced, the pressure of a cloud computing center is relieved, and the data security and privacy of the system are improved.

The invention discloses a catalyzation method for simultaneously removing aldehydes and benzene-series pollutants at room temperature, and belongs to the technical field of indoor air purification. The method comprises the following steps: putting a catalyst which is prepared by loading a noble metal to a molecular sieve carrier into an environment with aldehydes and benzene series; completely oxidizing aldehyde pollutants into CO2 and H2O in a room temperature stage; meanwhile, storing the benzene series on the catalyst; after the catalyst reaches or closes to saturation, heating the catalyst which stores the benzene series, wherein the heating temperature range is not less than 100 DEG C, and the optimal range of the regeneration temperature is 150 to 200 DEG C, the stored benzene series are completely converted into the CO2 and the H2O, and the catalyst is regenerated in situ. The time of the heating stage is extremely short relative to the room temperature stage; the energy consumption of the overall process is very low. By adopting the method, the actual using requirement on indoor air purification is met; the method has a broad application prospect in the field of indoor air pollutant purification.

The invention discloses a mineral composite air finishing agent and belongs to the field of indoor environmental protection. The mineral composite air finishing agent consists of modified sodium bentonite and modified active carbon, wherein the modified sodium bentonite accounts for 30 to 60 percentage by weight of the composite air finishing agent, and the balance is the modified active carbon; and the modified sodium bentonite consists of sodium bentonite, ferric sulfate, aluminum sulfate and magnesium sulfate. The invention also discloses a preparation method of the mineral composite air finishing agent. Experiments show that a function of removing air pollutant is obvious, and the removal rate of formaldehyde, benzene, ammonia, TVOC (total volatile organic composite), heavy metal, respirable particulate matters and the like is greatly improved. The mineral composite air finishing agent and the preparation method thereof are mainly used for treating indoor air pollutants.

A clean central air conditioning system consists of a primary filter, a blower, an air conditioning set, a secondary filter, rooms, an adsorbing purifier, and a moisture supplier. A part of circulated air is exhausted out while some fresh air is mixed with remained air to be fed into the primary filter. The filtered air is blown into air conditioning set for regulating temperature, then filtered, purified, moisture regulated, and provided into rooms. The system can effectively reduce pollutants in air, prevent from diseases concerned, and provide a pleasant indoor environment.

The invention discloses a method for preparing a Fe2O3 / Ti-MCM-41 mesoporous composite material. In the method, ordered MCM-41 is used as a carrier, TiO2 is used as a catalyst and is modified by being doped with iron, the iron source is ferric sulfate, the ordered MCM-41 is synthesized by a hydrothermal process, metal titanium atoms are introduced in a framework forming process, and the molar ratio of elements, namely TiO2, SiO2 and cetyltrimethyl ammonium bromide (CTAB), in precursor solution is 0.02:1:0.2. The preparation method comprises the following preparation steps: adding 100 to 200-mesh silica gel into 1.5 mol / l solution of sodium hydroxide, and violently stirring at a constant speed; adding CTAB solution at a mass percentage concentration of 10 percent into the solution of sodiumhydroxide, and violently stirring at a constant speed; adding tetrabutyl titanate into the mixed solution and violently stirring at a constant speed; adding ferric sulfate into the mixed solution andviolently stirring at a constant speed; regulating the pH value to 11.5 with 2mol / l HCl regulating solution, and performing a crystallization reaction at 100 DEG C; washing a sample till the sample is neutral and drying in an oven at 100 DEG C; and taking the product out and baking in a muffle furnace at 300 DEG C. The obtained Fe2O3 / Ti-MCM-41 mesoporous composite material has high absorption andphotocatalytic performance, high response to sun light and stable performance and can effectively treat a formaldehyde indoor air pollutant.

The invention relates to an electric switch, particularly to a cycle-timing switch with adjustable speed for controlling power source on and off according to quality of indoor air. The invention can be applied to controlling indoor ventilation device, so as to guarantee that indoor fresh wind quantity meets the lowest standard for indoor staff, and that concentration of indoor air pollutant maintains at lower level below qualified concentration, and energy can be saved in maximum based on these two conditions. The invention also can meet speed regulation control of change speed and stepless speed regulating ventilation device.

The invention discloses a method for removing indoor air contaminations based on the synergistic action of a negative ion generator and mixed medium, which is realized by the joint action of a negative ion generator module and a cellular mixed medium module. According to the method, the negative ion generator module generates negative ions and ozone, and the cellular mixed medium module is filled with the mixture of modified active carbon and a catalyst; the modified active carbon is modified by using alkali, acid, or a metal and a metal oxide according to different contaminations; the catalyst is an oxide of a noble metal or a transition element metal; when contaminated gas passes through, gaseous contaminations are degraded under the chemical action of ozone, the modified active carbon and the catalyst, ozone is catalyzed to be degraded, and air reaching an outlet contains negative ions, so that the content of ozone is greatly reduced, and air is fresh and pollution-free, and is safe in use. The method disclosed by the invention is applied to air purification of an indoor air purifier or an air-conditioning system.

The invention relates to a preparation method of compound purifying agent used for removing formaldehyde from air, belonging to the technical field of metallurgy chemical industry preparation. The invention is suitable for purifying the formaldehyde, etc. various harmful gases in the present family decoration. The compound purifying agent takes waste active carbon containing 5 to 10 percent of zinc as material, and activates and recycles the waste active carbon through decomposing, adulterating, activating and modifying processes, changes the chemical combination state of the zinc in the waste active carbon, simultaneously and leads various functional units which can absorb and degrade the organic volatile matters to be formed on the surface of the active carbon. The invention can adapt to a long existence period and a long release period of indoor air pollutants, and the removal rate to formaldehyde, etc. harmful gases can reach more than 90 percent. .

The invention discloses an indoor air purification system based on a plant wall. The indoor air purification system based on the plant wall comprises a support wall body, a plant wall body, a fan system and an intelligent control system. The fan system is installed on the support wall body and connected with the intelligent control system. The plant wall body is arranged on the front portion of the support wall body in parallel, the peripheries of the plant wall body and the support wall body are sealed, and thus a sealed cavity is formed. The fan system sucks air into the sealed cavity, and the air is purified after passing through the plant wall body and then released in a room. According to the indoor air purification system based on the plant wall, the structure is reasonable, indoor air flow is accelerated, the contact time between the indoor air and plants is prolonged, indoor air pollutants are effectively decreased, the indoor air humidity is adjusted, the negative oxygen ion content is increased, and the indoor air quality is improved; and the fan system is started intelligently, the energy consumption is reduced, and the requirement for green buildings is met.

A display filter for a display device having a display module includes a base substrate disposed in front of the display module, at least one optical filter layer layered on the base substrate, and an indoor air purification layer layered on an outwardly exposed side of the display filter and removing indoor air pollutants.

The invention discloses a novel plant wall and belongs to the field of three-dimensional greening and indoor air pollutant treatment. The novel plant wall comprises a plant wall body, a water supply system, a light supplement system, a ventilating system and a waste water collecting system. The plant wall body comprises an arc module mounted on a three-dimensional support frame, a plurality of unit support plates for containing plants are arranged outside the arc module, rotators are arranged on the plates and provided with round plant troughs, and plants are planted on the plant troughs; the water supply system comprises a water pump, a water tank, a filter and a water supply pipe; the light supplement system is composed of light supplement lamps at the top of the three-dimensional support frame; the ventilating system is composed of fans which are vertically distributed on one side of the three-dimensional support frame; the waste water collecting system is composed of soil gravel and water collecting pipes. The novel plant wall can purify indoor air, adjust humidity and beautify wall surfaces and can be widely applied to buildings such as malls, theaters, exhibitions and residences.

The invention discloses an indoor air pollution source analysis system and a method thereof. The method includes the steps of establishing a site database, a pollution source database, an air quality database, and an air quality index database in advance; calculating the pollution source and pollutant comparison data of a specific indoor field, the concentration index value of the pollutant of each pollution source in the specific indoor field, and the hazard fraction value of the pollutant of each pollution source in the specific indoor field by the above databases in a progressive manner; then calculating the contribution proportion of each pollutant in the specific indoor field in a programming solution algorithm to achieve the effect of finding the contribution proportion of the indoor air pollutant accurately and proposing a corresponding improvement scheme.

This invention relates to in-house air purification and damping method base on catforming and its equipment. Air is sent into air purification column that filled with chemical modification adsorbent stationary bed by ventilating plant to make poisonous, harmful chemical substance, dust particle and bacteria microorganism to be adsorbed and removed by filtration. Chemical modification adsorbent not only has great adsorbing capability and good filtration, but also can turn adsorptive poisonous matter into nontoxic matter. so it can purify air in-house. Air after purification is delivered to under water level of a sir damping equipment. Then the air is purified further, and the air enters room again with moisture. The in-house air is purified and damped further. In the equipment, air can be heated according to in-house humidity to increase the moisture quantity carried by the air, or the air is not heated and it carry natural moisture after through water to house. Double goals of in-house air purifying and damping is reached by this multifunction setting, so people can enjoy fresh air in closed house.

The invention discloses a diatomite coating capable of adsorbing formaldehyde and a preparation method. The diatomite coating comprises, by weight, 25-50 parts of diatomite, 2-5 parts of glass fiber,0.5-2.0 parts of dispersant, 20-30 parts of adhesive, 5-35 parts of nanoscale titanium dioxide, 5-35 parts of nanoscale zinc oxide and 2-5 parts of plant fiber, weight percent of SiO2 contained in diatomite is greater than or equal to 90%, and grain size of diatomite is 60-150 meshes. The diatomite material has large specific surface area and high adsorbability, various nano materials which are mixed are combined, the glass fiber improves light reflection, and the plant fiber is added to enhance adsorption of humidity and formaldehyde, so that indoor air pollutants are reduced substantially, and indoor environment is improved actively; diatomite has through pore diameter, thereby having extremely high heat insulativity and sound absorptivity; diatomite has effects of eliminating static electricity in indoor air and killing parasites and microorganisms, can prevent molding and color-changing of wall surfaces and obviously reduce indoor peculiar smell.

The invention discloses an electric field-assisted indoor air purification device. The electric field-assisted indoor air purification device an adsorption rotation wheel, a circulation airflow channel and an exhaust airflow channel, wherein the circulation airflow channel and the exhaust airflow channel flow through the adsorption rotation wheel and are spaced by a rubber partition in the adsorption rotation wheel and are respectively used for adsorbing and purifying the airflow and desorbing pollutants on the adsorption rotation wheel; the air is continuously and circularly filtered and purified by continuous rotation of the adsorption rotation wheel. Through the electric field-assisted indoor air purification device, the active carbon is combined with a strong electric field for purifying the indoor air; the air adsorbed by the active carbon can meet comfortable living requirements of no color, no taste, no odor and no infectious bacteria; meanwhile, the pollutants adsorbed to the active carbon is desorbed under the action of the strong electric field and is discharged out of the room along with the exhaust airflow. The electric field-assisted indoor air purification device has the advantages of simple system and capability of continuously removing indoor air pollutants.

The invention provides an air purification control method and device and air purification equipment, and relates to the technical field of air purification. According to the scheme, the method comprises the steps that after an air purification unit is started to operate for preset duration, whether the currently operating air purification unit can meet a purification requirement or not is judged by utilizing a change rate of an indoor air pollutant concentration; if the currently operating air purification unit can meet the purification requirement, under the condition that the indoor air pollutant concentration is continuously reduced, operation of the air purification unit is controlled according to the pollutant concentration, an operation state of the air purification unit is adjusted,on the premise that a purification effect is guaranteed, and energy consumption can be reduced; and if the change rate of the indoor air pollutant concentration does not meet a requirement that the change rate is smaller than or equal to zero in a continuous preset number of periods, it is indicated that the currently operating air purification unit cannot meet the air purification requirement, at least one air purification unit is added for operating to improve the indoor air purification efficiency, and it is ensured that the indoor air purification requirement is met.

The invention provides an environment-friendly indoor air purification device. The environment-friendly indoor air purification device comprises a cavity shell, wherein an inhalable particle filter layer, a carbon monoxide filter layer, a nicotine filter layer, an organic pollutant filter layer, an ozone filter layer and one or more than one in a primary filter layer, a disinfection filter layer and a negative ion generation layer. The environment-friendly indoor air purification device can be used for effectively removing indoor air pollutants and has important significance fot the improvement of the indoor air quality as well as the prevention of various diseases caused by the air pollution.