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| Number | Title | Issue Date |
| 7399222 | Apparatus for operating auto-shutter in air-conditioner An apparatus for operating an auto-shutter in an air-conditioner having an external casing includes a louver frame having an air exit installed in the external casing, an auto-shutter movable between an opened position opening the exit and a closed position closing ... | 07/15/2008 |
| 7377952 | System and method for removing contaminates from the air in a mail-sorting room An air decontamination system including a sealed room to hold at least one person and the sealed room having an air inlet. The system further including a vacuum unit to create a negative pressure within the sealed room, by suctioning air through the air inlet into t... | 05/27/2008 |
| 7347773 | Silencer for fume extracting hoods The silencer for fume extracting hoods is comprised of a panel (1) consisting of a lower tray (4), an insulating intermediary sheet (5), and an upper or porous filling foamed material (6) acting as a sound absorbing and limiting or dampin... | 03/25/2008 |
| 7251953 | Environmental control unit for hospital room An air conditioner and filtering unit produces a positive or negative pressure to create an isolation space. A common air intake plenum has first and second inlets for admitting return air from the space or outside air which may be from a building main A/C system su... | 08/07/2007 |
| 7231967 | Ventilator system and method The ventilator system and method use a heat exchanger to selectively transfer heat between fresh outside air entering and exhaust air leaving an enclosed space whenever energy can be recovered from the exhaust air by doing so. The system uses a microprocessor-based ... | 06/19/2007 |
| 7228657 | Climate control for a greenhouse A greenhouse has an exterior curtain wall structure formed by spaced tubular posts carrying external transparent panels and bottom non-transparent wall panels below a sill with the panels spanning the posts. A plurality of elongate benches is located within the inte... | 06/12/2007 |
| 7204096 | Indoor apparatus for air conditioner An air discharge outlet comprises line air discharge outlets (35) and corner air discharge outlets (36). The line air discharge outlets (35) are so formed as to extend, respectively, along four sides of a casing bottom part having four side part... | 04/17/2007 |
| 7192553 | In situ sterilization and decontamination system using a non-thermal plasma discharge A sterilization and decontamination system in which a non-thermal plasma discharge device is disposed upstream of a suspension media (e.g., a filter, electrostatic precipitator, carbon bed). The plasma discharge device generates a plasma that is emitted through aper... | 03/20/2007 |
| 7191607 | Air conditioning system with moisture control Devices and methods for moisture removal from conditioned air. A speed control is provided that selectively operates the blower motor of an air conditioning system at a lower speed. The speed control may include a time delay circuit and single pole, double throw rel... | 03/20/2007 |
| 7105037 | Semiconductor manufacturing facility utilizing exhaust recirculation A semiconductor manufacturing process facility requiring use therein of air exhaust for its operation, such facility including clean room and gray room components, with the clean room having at least one semiconductor manufacturing tool therein, and wherein air exha... | 09/12/2006 |
| 7094142 | Portable device with interchangeable air cleaning modules for cleaning the air outside of an existing enclosed space and delivering the cleaned air into the existing enclosed space A portable device that is placed between the ambient air outside an existing enclosed space and the existing enclosed space that pulls the ambient air through an interchangeable array of air cleaning modules and delivers the cleaned air from the air cleaning modules... | 08/22/2006 |
| 7081049 | Ventilating system Ventilating system including a case mounted on a ceiling of a room, an inlet in a bottom surface of the case, and an outlet in a side surface of the case, a partition for dividing the case into an upper space, and a lower space, a fan in the upper space of the case,... | 07/25/2006 |
| 7044851 | Air handling system for specialized facility An air handling system for a specialized environment, such as an operating room in a hospital or other health care facility is presented. The air handling system includes an air recirculation system having a blower for drawing air from the specialized environment fo... | 05/16/2006 |
| 7011577 | Ventilating system Ventilating system including a case mounted on a ceiling of a room, an inlet in a bottom surface of the case, and an outlet in a side surface of the case, a partition for dividing the case into an upper space, and a lower space, a fan in the upper space of the case,... | 03/14/2006 |
| 6988671 | Programmable thermostat incorporating air quality protection The invention is directed to programmable temperature control in which a controller may be programmed to control a thermal output of said temperature-modifying device, and to operate an air circulating system independently of the temperature-modifying device. The ap... | 01/24/2006 |
| 6976911 | Method and apparatus for filtering airborne contaminants A method and apparatus for removing airborne contaminants in residential or commercial buildings injects filtered air into these enclosures. Prior to be injected in these enclosures, the air is filtered for chemical, biological or radioactive hazards. The filtering ... | 12/20/2005 |
| 6974380 | Laboratory air handling unit The invention is an air handling system that is shared between a laboratory and offices within the same building. The normally separate office and lab systems have been combined by way of an air return system that draws air from the offices and feeds into both the o... | 12/13/2005 |
| 6948553 | Modular heat recovery ventilation system A modular heat recovery ventilation system includes a modular heat exchanger and a modular apparatus spaced from the heat exchanger for delivering both fresh air and exhaust air to the heat exchanger. The apparatus includes separate blowers for generating two separa... | 09/27/2005 |
| 6945866 | Method and apparatus for delivering conditioned air using pulse modulation A method and apparatus for delivering conditioned air using short duty cycles during which a damper is fully open for a time and fully closed for the remaining time. Conditioned air is continuously supplied to a plenum at low pressure and is applied to the space whe... | 09/20/2005 |
| 6920874 | Intelligent ventilating safety range hood An improved ventilating range hood that drives a variable speed fan according to the state of four distinct air quality sensors: temperature, humidity, Carbon monoxide and smoke. A micro-controller is used to integrate the four signals and determine the appropriate ... | 07/26/2005 |
| 6811587 | Biological hazard mitigation apparatus for mail/package handling personnel safety and operating methods therefor A biological hazard mitigation apparatus permitting a material handling operation in the vicinity of a work area includes a plenum pneumatically coupled and proximate to one side of the work area, a filter sized to trap biological hazards and including an exhaust po... | 11/02/2004 |
| 6796896 | Environmental control unit, and air handling systems and methods using same An environmental control unit, and air handling systems using it, that combines, as a unitary packaged unit, equipment and associated functionality for air handling and affording protection to occupants and/or equipment in an enclosure against airborne release of ch... | 09/28/2004 |
| 6790136 | Methods and apparatus for recirculating air in a controlled ventilated environment Methods and apparatus for recirculating air in a controlled ventilated environment. In one example, recirculation of air from one or more rooms in a multiple room ventilated environment having a common source of supply air is controlled such that minimum ventilation... | 09/14/2004 |
| 6749125 | Central air conditioning, cooling and whole-house ventilation system A central air conditioning and ventilating system has an exterior air intake duct and a plurality of dampers for opening and closing air ducts. One damper is positioned in the exterior air intake duct and a second damper is positioned in the interior of a return air... | 06/15/2004 |
| 6709475 | Installation for processing wafers An installation for processing wafers that includes fabrication units, which are located in a clean room, and includes a supply system for supplying and discharging operating substances for the fabrication units. The supply system has first supply lines and first di... | 03/23/2004 |
| 6698219 | Energy-efficient variable-air-volume (VAV) system with zonal ventilation control A ventilation and air-conditioning system uses a first variable-air-volume system to cool and dehumidify fresh outside air and deliver it through a first duct to a mixing box located downstream. The system also uses a second variable-air-volume system to ... | 03/02/2004 |
| 6629886 | Demand ventilation module A demand ventilation module for use with HVAC/R systems for ventilating inside space of a structure through an air pressure differential between return air and outside air. The demand ventilation module includes an integrated damper and an electronic cont... | 10/07/2003 |
| 6609967 | Methods and apparatus for recirculating air in a controlled ventilated environment Methods and apparatus for recirculating air in a controlled ventilated environment. In one example, recirculation of air from one or more rooms in a multiple room ventilated environment having a common source of supply air is controlled such that minimum ... | 08/26/2003 |
| 6569010 | Induced air distribution system The present invention provides an air handling system that receives air from a primary air source and distributes that air in a room defining an enclosed space. The system is mounted in the ceiling of the room and generally comprises first, second, third,... | 05/27/2003 |
| 6514138 | Demand ventilation module A demand ventilation module is provided for use with HVAC systems in order to ventilate inside space of a structure through an air pressure differential between return air and outside air. The demand ventilation module includes an integrated damper. The d... | 02/04/2003 |
| 6431979 | Wall curb for HVAC system A wall curb 10 for attachment to the exterior wall 32 of a building to removably secure a wall mounted HVAC unit 38 to the exterior surface 44 of the wall 32. The wall curb 10 serves to attach the supply air duct 34 from within the building to the supply ... | 08/13/2002 |
| 6378317 | Air-conditioning method and device The invention concerns a method and a device for variable flow heating for controlling ventilating fresh air room by room in a building. The invention is characterised in that said method provides sequential control of the air using a central management u... | 04/30/2002 |
| 6358139 | Super-clean air device for the pharmaceutical, foodstuff, and biotechnology sector A super-clean air device for the pharmaceutical sector, foodstuff sector, and biotechnology sector has at least one fan for conveying fresh air in a conveying direction into the clean room and for removing return air from the clean room. At least one filt... | 03/19/2002 |
| 6353303 | Control algorithm for induction motor/blower system An apparatus and method for controlling an induction motor having a variable frequency drive in a blower system so that the blower system provides a specific fluid flow. A start-up program causes the motor to ramp up to approximately a predetermined stead... | 03/05/2002 |
| 6353302 | Speed computation function for induction motor/blower systems control algorithm An apparatus and method for controlling an induction motor having a variable frequency drive in a blower system so that the blower system provides a specific fluid flow. A start-up program causes the motor to ramp up to approximately a predetermined stead... | 03/05/2002 |
| 6346041 | Economizer The present invention is an economizer that is capable of mixing outside air and inside air while incurring a significantly low pressure drop across the return air damper. In one embodiment, the economizer comprises a mixing chamber, a return air vent, an... | 02/12/2002 |
| 6302783 | Air-conditioning device Air-conditioning device includes a holder which is to be arranged against the wall of the room and is provided with a top wall, front wall, side walls, base and rear wall. An opening for the supply of fresh air form the environment is arranged in the rear... | 10/16/2001 |
| 6267667 | Air duct evacuation system A fan motor or blower unit attached and manufactured as part of the heating and cooling systems for homes and buildings or attached later to the furnace or air handler, which will vent out the HVAC ducts by removing the residing air. This air duct evacuat... | 07/31/2001 |
| 6241154 | Air conditioning device An air conditioning device has a controller, a fan motor, a by-path strangler, and a heat exchange pipe. The fan motor is disposed in front of the heat exchange pipe. The by-path strangler is disposed between the fan motor and the heat exchange pipe. The ... | 06/05/2001 |
| 6227961 | HVAC custom control system A fan control system suitable for use in air moving applications has a pressure sensor responsive to an air pressure in an air duct for supplying a static pressure signal representative of the air pressure. A supply air flow sensor is responsive to an air... | 05/08/2001 |
