2064 results about "Indoor air quality" patented technology

The present invention provides an improved method and system for controlling an HVAC system for managing multiple indoor air quality (IAQ) parameters. An acceptable range is defined for each of the IAQ parameter. The parameters are then monitored by sensors within a controlled space. The parameters may comprise temperature, humidity, smoke, radon, VOCs, carbon dioxide, carbon monoxide, particulates, hydrocarbons, oxygen, ozone, and odors. The invention maintains the IAQ parameters within their respective acceptable ranges by automatically manipulating certain HVAC system functions including heating, cooling, humidification, dehumidification, ventilation, addition or removal of materials or compounds which affect IAQ parameters, airflow volume and air recirculation. In one embodiment of the invention, a non-HVAC-specific venting system is used to augment HVAC adjustment of airflow volume and air recirculation. This may include bathroom, kitchen and attic venting systems as well as whole-home vacuum systems.

A ceiling paddle fan fixture for improving the quality of the air in the room and various methods of enhancing room air quality, with particular application in public spaces such as hospitals, health care institutions, dormitories, schools and offices. A UV-C source and an air mover are combined in a single fixture which uses a low intensity UV-C source and a paddle ceiling fan to significantly increase the mixing of the treated with the untreated room air. Sterilization of room air is achieved by the passage of a high volume of air at a relatively slow speed through a relatively low intensity UV-C field.

An apparatus for accurately sensing room conditions and positioned in the air stream to the return air plenum. The apparatus is a combination of a temperature and volatile organic compound (VOC) sensor. The sensor module is built into a ceiling grid system with the body of the sensor module extending into the return air plenum. The ceiling grid has a slot fabricated into its face which allows the air stream from the room to flow by the sensors on its way to the plenum. This enables both the temperature and the composition of the air to be monitored at the optimal location. A portable pollution sensor device that measures and monitors leading indicators of indoor air quality and the extent of pollution is used in conjunction with the ceiling grid mounted sensor modules. The portable device documents and benchmarks air quality both in buildings under construction and in existing buildings. The portable device is network-enabled so as to simultaneously transmit the data to various control devices. In addition to its use to monitor areas not otherwise covered by the ceiling grid mounted sensors, the hand-held sensor can be used during building construction to determine the best locations in the ceiling grid system for mounting of the fixed pollution sensors.

The invention discloses a method for automatic reminding of the cleanness of an air conditioner, which is realized through the following steps: firstly, detecting the running current when an indoor blower of the air conditioner runs; and secondly, comparing the running current with a preset reminding current, if the running current is smaller than or equal to the preset reminding current, a filter screen of the air conditioner can be judged to be dirty or blocked, and an user is reminded. The invention further provides a relevant device for automatic reminding of the cleanness of the air conditioner. The method and the device provided by the utility model for automatic reminding of the cleanness of the air conditioner can exactly reflect the dirty and blocked conditions of the filter screen of the air conditioner and remind the user to clean the filter screen timely, so that the air conditioner can keep sanitary and clean, the indoor air quality can be ensured and the cost is lowered.

A system and method for cooling and heating of buildings consisting of an integrated assembly of devices, including a variable speed air handler, hot water heating coil, outside air damper, controller, and optional compressor-based air conditioner. During summer the system utilizes nighttime outside air for cooling and uses air temperature predictions to provide information about optimal control settings and to maintain comfort. During winter the system varies airflow with heating demand and ventilates with outside air to maintain indoor air quality.

A photocatalytic / thermocatalytic coating includes an inner layer of metal / titanium dioxide or metal oxide / titanium dioxide that is applied on a honeycomb and an outer layer of titanium dioxide or metal oxide doped titanium dioxide applied on the inner layer. The inner layer of can be gold / titanium dioxide, platinum / titanium dioxide, or manganese oxide / titanium dioxide. The outer layer of titanium dioxide or metal oxide doped titanium dioxide oxides volatile organic compounds to carbon dioxide, water, and other substances. As the outer layer is thin and porous, the contaminants in the air can diffuse through the outer layer and adsorb onto the inner layer. When photons of the ultraviolet light are absorbed by the coating, reactive hydroxyl radicals are formed that oxidize the contaminant to produce water, carbon dioxide, and other substances.

A building's Heating Ventilating and Air Conditioning (HVAC) system is made more energy efficient and the indoor air quality (IAQ) of the building's circulating air is improved by incorporating a greenhouse as an integral part of the HVAC system and by utilizing a novel feed forward control strategy that maintains the proper levels of temperature, humidity and CO2 concentration in the building under varying conditions of day, time, use and occupancy.A portion or all of the exhaust air from the building is discharged into a greenhouse where the heat and humidity are recovered in the winter by heating the greenhouse and the air conditioning is recovered in the summer by cooling the greenhouse. Selected plants are used in the greenhouse to remove CO2 and pollutants from the building's exhaust air while enriching the air with oxygen and beneficial negatively charged ions. The oxygenated, improved quality air from the greenhouse is then used to supply all or a portion of the intake air to the building's HVAC system.

A system and method for cooling and heating of buildings comprising an integrated assembly of devices, including a variable speed air handler, hot water heating coil, outside air damper, controller, and optional compressor-based air conditioner. During the summer the system utilizes nighttime outside air for cooling and uses air temperature predictions to provide information about optimal control settings and to maintain comfort. During the winter the system varies airflow with heating demand and ventilates with outside air to maintain indoor air quality.

An air quality monitoring and management system adapted to be mounted between an existing thermostat and a wall in which the thermostat was previously mounted, or directly at the HVAC system. The air quality monitoring and management system contains various wires for connecting to both a thermostat and HVAC system, thereby effectively intercepting the signal between the thermostat and HVAC system. The air quality monitoring and management system includes air quality measuring sensors, a housing for mounting between the wall and thermostat, and a controller that supplies electrical signals to the HVAC system through use of the aforementioned wires to supplement the control of the HVAC fan in conjunction with the thermostat to help increase air flow in the affected area. The air quality monitoring and management system may include an air quality management controller mounted to an HVAC air handling unit, and wirelessly connected to sensors.

An air conditioning system to improve indoor air quality (“IAQ”) comprises an air conditioner to receive indoor air from an indoor space and to heat or cool the air, the air conditioner to then return conditioned air to the indoor space. An IAQ option board (“IOB”), electrically coupled to the air conditioner control board, is configured to accept electrical inputs from at least one IAQ sensor. A fresh air damper is electrically connected to the IOB, the IOB controlling the position of the fresh air damper valve. An air purifier is situated such that air from the indoor space passes through the purifier. The operation of state of operation of the purifier is based at least in part on the input from at least one IAQ sensor to improve the IAQ of the indoor space.

A tungsten oxide / titanium dioxide photocatalyst coating oxidizes contaminants in the air that adsorb onto the coating into water, carbon dioxide, and other substances. The tungsten oxide forms a monolayer on the titanium dioxide. When photons of the ultraviolet light are absorbed by the tungsten oxide / titanium dioxide photocatalyst coating, an electron is promoted from the valence band to the conduction band, producing a hole in the valence band. The holes in the valence band react with water applied on the tungsten oxide / titanium dioxide photocatalyst coating, forming reactive hydroxyl radicals. When a contaminant in the air is adsorbed onto the tungsten oxide / titanium dioxide photocatalyst, the hydroxyl radical attacks the contaminant, abstracting a hydrogen atom from the contaminant. The hydroxyl radical oxidizes the contaminant, producing water, carbon dioxide, and other substances. The tungsten oxide / titanium dioxide photocatalytic coating has low sensitivity to humidity variations.

The invention relates to the field of heating ventilation air conditioners, in particular to an improved air treatment method and a fresh air conditioner device. The invention improves the problems of traditional fresh air treatment and air conditioners and particularly emphasizes that a plate-type air-air heat exchanger and indirect water evaporative cooling are used for recycling energy of sensible heat and latent heat in air exhaust in the fresh air treatment process of damp and hot regions in summer and condensed water is directly evaporated on an evaporator to improve the working condition of a compressor. Under the condition of quantificationally supplying outdoor fresh air, the energy efficiency ratio of the fresh air conditioner is increased, the thermal pollution, damp pollution and noise pollution of the fresh air conditioner to environments are reduced, the indoor air quality is improved, and meanwhile, the fresh air conditioner provides the manufacture, installation and using convenience for a local region all-air central air conditioner. The fresh air conditioner provided by the invention and a design and manufacture method of the fresh air conditioner are applicable throughout the year in various regions, particularly in the damp and hot regions; and the fresh air system provides controlled, comfortable and healthy air environments for indoor activity space of people and air conditioner environments for technology for processing, storage and the like.

The invention discloses an electronic nose for detecting indoor air quality. The electronic nose mainly comprises a nose frame, a shell, a suction fan, HEPA (High Efficiency Particulate Air) filter paper, a nasal cavity, a gas sensor array and a processing circuit integration module thereof, a DSP (digital signal processor), a human-computer interaction interface, a harmful gas absorption and purification device and the like. The electronic nose is characterized in that indoor air to be detected is sucked into the nasal cavity by the suction fan through the HEPA filter paper to perform a full reaction with the gas sensor array; the measurement and identification of harmful gases in the air are completed inside the nasal cavity; then the harmful gas absorption and purification device is used for absorbing and purifying harmful gases with high concentration. The electronic nose has the characteristics of small size, anti-interference, quickness, accuracy, secondary pollution prevention and the like, and is suitable for detecting the harmful gases in the indoor air.

The invention discloses an intelligent fresh air control device, which relates to a fresh air conditioning device of an air conditioning system. The intelligent fresh air control device mainly comprises a temperature humidity sensor, a carbon dioxide concentration sensor, a computer controller, an electrically operated valve and the like. The intelligent fresh air control device has the characteristics of intelligent control, convenient use, accurate control, energy-saving operation, small volume and low cost. And the intelligent fresh air control device also has the characteristics of improving the indoor air quality and meeting requirements of people for the indoor comfort and health. The intelligent fresh air control device can be widely applied to the air conditioning systems of various buildings such as residences, hotels, public buildings and the like and is the fresh air device which is controlled intelligently and saves energy.

The invention discloses a split air conditioner with a fresh air purification intelligent control device. The split air conditioner with the fresh air purification intelligent control device comprises an outdoor unit and an indoor unit, wherein a fresh air pipe, a fresh air valve, an air return valve, an air quality detection sensor, a purification and filtering system, an evaporator, an auxiliary heater, a double-air-inlet low-noise centrifugal air supply fan and an air supply outlet with manual adjustable swing blades are sequentially arranged in the indoor unit from bottom to top. The split air conditioner with the fresh air purification intelligent control device fully solves the problem of poor indoor air quality, and outdoor fresh air can be introduced inside at proper time and can be purified; temperature and humidity adjustment can be realized; indoor VOC harmful gas can be removed; the air conditioner is provided with an internal circulation working mode and an external circulation working mode, i.e., a fresh air mode and a mixed air mode; the one-step filtering efficiency of inhalable particulate matters PM2.5 at the indoor air outlet can reach more than 90 percent and the national good standard of less than 35mg can be reached; the split air conditioner with the fresh air purification intelligent control device is convenient to install, and the installation, debugging and maintenance are facilitated by adopting a split design; the cost performance of the entire air conditioner is high, and the air conditioner is low-carbon, energy-saving, healthy and comfortable.

First, a system for providing liquid refrigerant subcooling, subsequent to that subcooling accomplished by the primary condenser of an air conditioner or heat pump, by means of evaporative cooling utilizing the condensate water of said air conditioner or heat pump system and / or some other water supply to wet the surface of the subcool heat exchanger and then passing the cold, dry building exhaust air required for good indoor air quality across the wetted surface of the subcool heat exchanger. Said exhaust air could be used after first undergoing a sensible heat exchange with the incoming make up air. Said subcooling providing for an increased refrigeration capacity, and efficiency of the system. Secondly, a system for providing hot gas discharge refrigerant precooling before said hot gas passes into the primary condenser of an air conditioner or heat pump, by means of evaporative cooling utilizing the condensate water of said air conditioner or heat pump system and / or some other water supply to wet the surface of the precool heat exchanger and then passing the cold, dry building exhaust air required for good indoor air quality across the wetted surface of the precool heat exchanger. Said precooler providing lower power consumption of the compressor, lower head pressure, increased mass flow of the refrigerant and improved efficiency of the primary condenser of the air conditioning or heat pump system. Said exhaust air could be used after first undergoing a sensible heat exchange with the incoming make up air on either the subcooler or precooler. Finally, a combination subcooler and precooler system where the cold dry exhaust air is first used to evaporatively subcool the liquid refrigerant in the water wetted subcooler and then subsequently used to conductively cool the hot gas refrigerant passing through a dry surface precooler or alternately used to evaporatively cool the wetted surface of the precooler thereby evaporatively precooling the hot gas refrigerant passing through the precooler.

The invention provides a fresh air conditioner and a control method thereof. The fresh air conditioner comprises an air conditioner body and a fresh air device positioned at one end of the air conditioner body, wherein a primary evaporator is arranged in the air conditioner body for exchanging heat for indoor air; and an air outlet of the fresh air device is equipped with a secondary evaporator for exchanging heat of fed-in outdoor fresh air. The control method for the fresh air conditioner comprises the following steps of: starting the fresh air conditioner; obtaining an indoor air quality value; judging whether the air quality value is greater than an air quality threshold value or not; starting the fresh air device if the air quality value is greater than the air quality threshold value; obtaining outdoor environment temperature and indoor environment temperature; judging whether temperature difference between the outdoor environment temperature and the indoor environment temperature is greater than a temperature difference threshold value or not; starting the secondary evaporator for exchanging heat for outdoor fresh air if the temperature difference between the outdoor environment temperature and the indoor environment temperature is greater than the temperature difference threshold value; switching off the secondary evaporator until the temperature difference is smaller than the temperature difference threshold value; and switching off the fresh air conditioner. The technical scheme provided by the invention can be used for controlling indoor air quality while controlling the indoor temperature stably, so that good experience is given to a user.

The invention discloses an automobile indoor air quality monitoring system and method. the system comprises car body controller connected to power supply through ignition switch, air conditioning unit, anti-theft loudspeaker, trouble alarm lamp located at the input terminal of the car body controller and connected to at least two air sensing unit for observing and measuring air quality in and out the automobile, and output terminal connected to anion generator, ozonizer, and oxygen generator control valve. Car body controller observes and measures air quality in and out the automobile through the air sensing unit, performs contrast to judge whether unlocking anion generator, ozonizer, and indoor air extrinsic cycle or not, performing dust filtration to the outer air. The system has autocycle monitor supervision and gaseous exchange functions.

A device for improving the quality of indoor air comprising a casing (2) with an air inlet (3) and an air outlet (5), a member (7) arranged to cause air in a room, in which the casing is placed, to flow in through the inlet and inside the casing to the outlet and therefrom out into the room again, and leaf surfaces and water nozzles (9, 11) adapted to influence the quality of the air passing through the casing. The casing also contains leaf plants (9) and the member (7) is provided in order to cause the air to flow past the leaf surfaces of the plants in order to remove contaminations and particles from the air by absorption thereof by the leaves of the plants.

The invention discloses a multi-functional air purifier and an energy conservation using method thereof, belonging to the technical field of environmental protection devices. The multi-functional air purifier comprises a purifier body, a purification main air channel, a purification non-work area, a dust collecting air channel, a slideway, a detection and control device and other parts; the purifier body consisting of a stereometric frame structure comprises a front part, a middle part and a rear part; the purification main air channel is positioned in the middle of the purifier body; the purification non-work area and the dust collecting air channel are located at the front of the purifier body; the slideway positioned between the purification non-work area and the purification main air channel is installed in the purifier body; and the detection and control device is installed at the rear of the purifier body. The energy conservation using method of the multi-functional air purifiercan select different working modes to respectively carry out filter purification treatment, dust collecting treatment, toxic and harmful gas absorption and purification treatment and carbon dioxide absorption and purification treatment on indoor air according to the current indoor air quality condition, so as to ensure the air purifier to work at high efficiency with low energy consumption and achieve energy conservation effect.

A method for improving air quality in a human dwelling may include irradiating a portion of air flowing through an airflow conduit with ultraviolet light. The method may include turbulating, filtering, and / or adjusting a humidity of at least a portion of the air. The method may include creating an air pressure within the dwelling that exceeds an air pressure outside of the dwelling and / or monitoring air quality of at least a portion of the air. A system for improving air quality of air flowing through an airflow conduit may include an ultraviolet light source, a humidity control unit, a turbulator, and / or a filter. The system may include a blower and / or a ventilator. The system may include a sensor and / or a monitor for transmitting air quality characteristics to a remote site.

The invention relates to an interconnecting communication system and method for a smart phone and air purifiers. The system comprises the smart phone, a mobile network, a central sever and wireless routers, a user installs APP software on the smart phone, the smart phone is in communication with the central server through the wireless network, the central server has a fixed IP address, and the central server is connected with the wireless routers of the user through the Ethernet. WIFI communication modules are installed in the air purifiers, and are in communication with the corresponding wireless routes. Air quality data of every day are transmitted to the central server through all the air purifiers and stored, data of the server are analyzed periodically, the air quality conclusion is made, and a result is fed back to the smart phone of the user. Indoor air quality can be monitored in real time, and the air purifiers can be tuned on and controlled at any time to clean and filter indoor air.

The invention discloses a method for evaluating indoor air quality and a system for monitoring and analyzing indoor air quality. The method comprises the following steps of: monitoring environmental data in an enclosed room; computing mean square deviations between carbon dioxide concentration values measured in real time within a preset period of time and carbon dioxide concentration values at the same moments computed with a formula 1 under the condition of the value of a ventilation rate Q selected within a preset range; determining the value of a ventilation rate Q' which corresponds to a minimum mean square deviation in the computed mean square deviations as a ventilation rate Q in the enclosed room; computing the intensities F of polluting sources which produce polluting components based on the determined ventilation rate Q and the concentrations of the polluting components contained in monitored pollutants; and analyzing the indoor environment based on the monitored environmental data and the computed intensities of the polluting sources. By adopting the method and the system, the concentrations of a plurality of polluting sources in the indoor environment can be monitored in real time, and the air quality can be evaluated and analyzed according to monitoring data.

The present invention provides a ventilation system for improving air quality of an indoor space. The system includes sensors for measuring PM2.5 particle level P, CO2 level C, and TVOC level T in the indoor space. A control circuit is configured to receive P, C and T values and generate an output signal Vout according to a specific algorithm, which in turn controls speed-variable EC motors that drive ventilating fans. The invention exhibits numerous technical merits such as lower energy consumption, programmable operation, high efficiency, and lower noise, among others.

Disclosed is a kitchen exhaust hood and makeup unit control system comprising a control device for controlling the variable speed drive (VSD) for the associated fan, and measurement devices comprising Volatile Organic Compound (VOC) gas transmitter devices and temperature transmitters devices. The exhaust fan VSD speed is controlled to maintain the kitchen hood area at certain comfort level (indoor air quality and thermal comfort) by monitoring the VOC concentration and exhaust duct temperature. The air quality sensors measure the concentration of multiple gases and odorous substances in the air with constant output. These substances, for example, may be cooking smoke, kitchen vapors, human odors and unpleasant smells. The exhaust fan speed is controlled using the proportional-integral-derivative (PID) control loop. The kitchen exhaust and make-up unit supply airflow rate may be measured by an airflow measurement means such as Fan Airflow Station. The kitchen make-up unit fan speed is controlled to maintain the constant airflow difference between the exhaust air and make-up air to maintain the slightly negative pressure in the kitchen area.

The invention relates to an air quality test and display device of a purifier. The air quality test and display device of the purifier is characterized by including sensors, a central processing unit, and a display screen, wherein the sensors collect the indoor air quality parameters and the sensors include a temperature sensor, a humidity sensor, a light sensor, a dust sensor and / or a smoke sensor; the central processing unit is connected with the sensors, processes signals of the sensors and controls the processed signals; the display screen is connected with the central processing unit and is provided with a displaying function, and the air quality parameters processed by the central processing unit such as temperature, humidity, dust particles and / or smoke are displayed on the screen; the air quality test and display device of the purifier has functions of testing and adjusting the air quality automatically, displays the air-purifying degree and alarms through the display screen at the same time. The air quality test and display device of the purifier has the advantages of being reasonable in structure and convenient to use, capable of greatly improving the intelligentization of the air purifier, capable of saving energy and protecting environment, and capable of satisfying the humanized practical demands.

The invention discloses a multifunctional indoor air quality improving device which comprises a shell. An air inlet and an air outlet are arranged on the shell, an air duct connected the air inlet and the air outlet is arranged in the shell, a fan is arranged on the air duct, a sterilization cavity, an oxygen generating device, an ozone generator, an anion generator, a humidity adjustor and a detection control system are arranged in the shell. The multifunctional indoor air quality improving device can improve indoor air from multiple sides and has an automatic adjusting function, so that indoor air quality is constantly maintained optimal and a good indoor environment is provided for people.

The present invention relates to indoor air quality control equipment by utilizing ventilation system and its method. Its control equipment includes ventilation system and air purifier. Said ventilation system can be used for sucking outdoor air and discharging indoor air to implement indoor ventilation, and the air purifier can utilize filter system to raise indoor air quality. Its control method utilizes the devices of carbon dioxide sensor, dust sensor and gas sensor, etc. and adopts the measures of detecting carbon dioxide concentration and detecting indoor air pollution extent, etc. Besides, it also provides the concrete steps of said control method.

A fresh air controller interfaces directly with the electromechanical circuit of an air-conditioner to control its operating settings based upon detected Carbon Dioxide (CO2) level in Parts-Per-Million (PPM) using a “Capno-Switch” which is in essence a specially designed single-beam NDIR CO2 sensor enhanced with features and specifications to render it rugged, compact and very low-cost; unlike conventional single-beam NDIR CO2 sensors, the “Capno-Switch” is capable of providing long-term stability and accuracy in CO2 measurements. The operating settings it can control for the air-conditioner include 1) shutting off the fan, cooling unit and fresh air damper to save energy when the detected CO2 level in the cold air duct is less than 600 PPM; 2) turning on only the fan when the CO2 level is between 600-1,000 PPM; 3) turning on both the fan and the cooling unit when the CO2 level is between 1,000-2,000 PPM and 4) starting to open the fresh air damper to let fresh air in when the CO2 level is in excess of 2,000 PPM. With the incorporation of the “Capno-Switch” as a fresh air controller, air-conditioners can now provide good indoor air quality while at the same time save energy by effectively shutting itself down when nobody is detected to be present.

The invention discloses an energy-saving control method and an energy-saving control system for constant-temperature constant-humidity air conditioning unit based on variable parameter adjustment, and relates to the field of air-conditioning energy-saving control. The energy-saving control method comprises the following steps: detecting temperature and humidity of outdoor fresh air, and calculating a fresh air enthalpy value ho according to the detected temperature value To and the detected humidity value Ho of the fresh air; detecting a return air temperature Tr and the humidity value Hr in a return air duct, calculating a return air enthalpy value hr; comparing the fresh air enthalpy value h0 with the return air enthalpy value hr in the return air duct, and adjusting an output signal according to a size for controlling the opening degree of a fresh air electric valve and a return air electric valve; a step of adjusting an variable air rate; a step of controlling and adjusting a variable air supply temperature; and a step of controlling a variable air supply dew point temperature. By virtue of variable parameter adjustment, the system is matched with load of the tail end better, so that the temperature deviation of an air-conditioning area is reduced, and operation energy consumption required by the system is greatly reduced; and when the indoor air quality is guaranteed, the system operation is more stable and efficient.