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| Number | Title | Issue Date |
| 7594539 | Heat exchange type ventilator A heat exchange type ventilator allows preventing its heat exchanger from being clogged with buildup of ice, and also alleviating cold-draft feeling. This ventilator has an exhaust-air coupling section and a supply-air coupling section, and a ventilating unit which ... | 09/29/2009 |
| 7438124 | Evaporative cooling system for a data-communications cabinet An electronics cabinet for storing a plurality of electronic devices therein is provided and includes a fan and an evaporative cooler. The fan draws a flow of air into the cabinet, circulates the flow of air through the evaporative cooler, and then across the electr... | 10/21/2008 |
| 7398821 | Integrated ventilation cooling 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 th... | 07/15/2008 |
| 7331854 | Common filtration unit for building makeup air and emergency exhaust A building protection system comprises a filtration unit, an air handling unit, an emergency exhaust subsystem, a first damper positioned between the filtration unit and the air handling unit, and a second damper positioned between the emergency exhaust subsystem an... | 02/19/2008 |
| 7284382 | Apparatus and method for controlling a fan, cooling unit and a fresh air damper of an air conditioner through use of a Capno-Switch 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... | 10/23/2007 |
| 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 |
| 7082352 | Temperature control apparatus for a heater using an encoder switch and method thereof Disclosed is a temperature control apparatus for a heater using an encoder switch and method thereof that controls an indoor temperature by driving a burner in accordance with a change of an indoor temperature and ventilating heated air indoors. The temperature cont... | 07/25/2006 |
| 7059400 | Dual-compartment ventilation and air-conditioning system having a shared heating coil An HVAC system has two variable-air-volume (VAV) systems, a first VAV system for moving fresh air and a second VAV system for moving recycled air. Both the fresh air and recycled air are cooled and dehumidified by a single heat-exchanging coil. The fresh and recycle... | 06/13/2006 |
| 7013969 | Low noise level HVAC system having displacement with induction A displacement ventilation, low noise level, mixed air, HVAC system for ventilating a commercial or educational facility. The system includes a central HVAC air handling unit containing first and second duct works for receiving and transmitting conditioned air to ro... | 03/21/2006 |
| 7013950 | Ventilation device The invention relates to a ventilation device for ventilation room by room and/or zone by zone and comprises: a) a device casing (12), which is provided in or adjacent an outer wall of a building or the like and which connects room air to outside air, b) a he... | 03/21/2006 |
| 7001265 | Air exhaust system An air exhaust system comprises a chamber. The chamber has side walls, a ceiling, an attic and a roof. The ceiling and roof have air flow apertures. Provided next is a duct with upper and lower ends. A turbine fan is provided. The fan is operatively coupled to the u... | 02/21/2006 |
| 6779735 | Air ventilation control system A system that allows fresh air to be brought into a furnace as part of the return air circuit. This not only helps to replace stale air within a home, it also provides adequate air supplies to establish enough positive pressure within the dwelling to prevent air inf... | 08/24/2004 |
| 6761038 | Modular air conditioner for a bus A module is provided for attachment to the roof of a bus and includes all of the necessary components for conditioning the return air from the passenger compartment and delivering conditioned air thereto. A plurality of modules can be mounted in various relationship... | 07/13/2004 |
| 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 |
| 6634422 | Method for controlling an economizer A method of controlling an economizer is provided. A heating, ventilating, and air conditioning unit is operated in one of a heating mode and a cooling mode to provide conditioned air to a plurality of zones. A first temperature representative of air retu... | 10/21/2003 |
| 6491094 | Control for a heating ventilating and air conditioning unit A control system for a heating, ventilating, and air conditioning unit having a heating stage, a cooling stage, and an economizer is provided. The system includes a memory configured to store a first predetermined temperature range and a second predetermi... | 12/10/2002 |
| 6488081 | Method for controlling a heating ventilating and air conditioning unit A method for controlling a heating, ventilating, and air conditioning unit is provided. A conditioning unit having a heating stage, a cooling stage, a fan, and an economizer is operated to provide supply air to one or more zones. The temperature of air in... | 12/03/2002 |
| 6398118 | Thermostat incorporating thin film carbon dioxide sensor and environmental control system A system for monitoring and modifying the quality and temperature of air within a conditioned space includes a blower unit, a damper unit for selectively admitting outside air into the conditioned space, a temperature moderating unit and a control unit. T... | 06/04/2002 |
| 6250382 | Method and system for controlling a heating, ventilating, and air conditioning unit A method and system for controlling a heating, ventilating, and air conditioning unit is provided. The system includes a conditioning unit having a heating stage, a cooling stage, and a fan. The conditioning unit operates in an active mode where one of th... | 06/26/2001 |
| 6176305 | Ventilator system and method The ventilator system and method use a isolating heat exchanger to selectively transfer heat between exhaust air leaving an enclosed space and outside air entering the enclosed space. The system operates in three basic modes, under the control of a microp... | 01/23/2001 |
| 6105666 | Vehicular air conditioning apparatus Described is an apparatus for air conditioning a passenger compartment of an automotive vehicle which achieves a quick warming-up of the passenger compartment. In the air conditioning apparatus, in addition to a coolant of a vehicular engine which is util... | 08/22/2000 |
| 6089464 | Thermal dynamic balancer The present invention is directed toward a VAV (variable air volume) air conditioning system which is capable of varying the supply air volume to a space based upon discharge temperature while simultaneously maintaining constant ventilation. The thermal d... | 07/18/2000 |
| 5971067 | Air quality control system The present invention is a system for controlling the quality of air in a building. The system includes a sensor disposed for sensing the air quality in a building. Upon a sensing of an air quality problem, the system issues a command to draw in additiona... | 10/26/1999 |
| 5791408 | Air handling unit including control system that prevents outside air from entering the unit through an exhaust air damper A control system for controlling an air handling unit. The control system links the position of an exhaust air damper and a recirculation air damper so as the exhaust air damper is opened, the recirculation air damper is closed the same amount, and vice v... | 08/11/1998 |
| 5775406 | Ventilation message display system and method for a vehicle A ventilation display system determines when a ventilation system has remained in recirculation mode for a predefined time, and in response generates a stale air alert message inside the cab of a truck. The system can generate messages alerting the driver... | 07/07/1998 |
| 5725048 | Process for cooling drive components and heating the passenger compartment of a motor vehicle, especially an electrically driven vehicle, and arrangement for implementing the process In vehicles having drive systems with a highly variable degree of heat generation but in which the total quantity of heat generated is small, the heat given off is inadequate to warm the vehicle properly. The cooling system must nevertheless be designed f... | 03/10/1998 |
| 5720181 | Air conditioning installation, especially for a motor vehicle A motor vehicle air conditioning system includes an adjustable position air inlet valve for controlling the relative proportions of recirculated air and fresh air from outside entering the system. A first sensor and a second sensor give respective measure... | 02/24/1998 |
| 5706667 | Air conditioning apparatus According to the present invention, when the inside air circulation mode is determined, the blower for blowing air to the heat exchanger is operated with the regular blower voltage. When the outside air introduction mode is determined, the blower is opera... | 01/13/1998 |
| 5626288 | Process and apparatus for ventilating an enclosed space A method and apparatus for ventilating an enclosed air space, such as the crawl space under a building, and which includes a controller which is switchable between a cooling mode which activates a ventilating fan upon the temperature in the space reaching... | 05/06/1997 |
| 5485878 | Modular air conditioning system A heating, ventilation, and air conditioning (HVAC) system is disclosed which is capable of receiving interchangeable ventilation modules having varying degrees of air mixing abilities. A ventilation module fits inside the HVAC system and connects to a re... | 01/23/1996 |
| 5423187 | Rooftop air conditioning unit and method of modification with a rotary regenerative heat exchanger A rooftop air conditioning unit for conditioning air in a conditioned space is provided with a rotary regenerative exchanger where sensible and latent heat transfer occur between exhaust air and fresh air with the use of a rotary regenerative exchanger. T... | 06/13/1995 |
| 5346127 | Air conditioning system with enhanced dehumidification feature An air conditioning system is provided with indoor and outdoor air. Since the moisture content of the outdoor air is the major factor in determining the resulting humidity of the indoor space to which conditioned air is supplied, outdoor air is cooled to ... | 09/13/1994 |
| 5337574 | Heating and cooling system for a building A reversible vapour compression refrigeration plant serves as an air conditioner for cooling or as a heat pump for heating. A main stream of inlet air is divided into separate main and bypass streams of air and proportion of flow between the two streams i... | 08/16/1994 |
| 5333783 | Automated air mixing system An air handling system is provided which includes sections for the introduction of outside or ambient air relative to a structure to be mixed with a flow of inside or return air in a flow path in which the resulting mixture is impelled by a fan to be disc... | 08/02/1994 |
| 5279609 | Air quality-temperature controlled central conditioner and multi-zone conditioning An air quality and temperature responsive air conditioning system wherein modules are employed to precondition the air for humidity control, to heat and cool the air, and to bypass the supply air in excess of the demand of a multiplicity of comfort zones ... | 01/18/1994 |
| 5261596 | Air quality conditioning system An air quality conditioning system for adjusting an environmental air quality in an accommodation space comprises; a detection device for detecting the air quality; another detection device for detecting the temperature and humidity; a signal processor fo... | 11/16/1993 |
| 5259553 | Interior atmosphere control system An interior atmosphere control system contains a group of sensors to detect/measure indoor and outdoor air temperature, humidity, air pressure, oxygen content, carbon-dioxide content, static electric charge, indoor wall temperature, sound and light. These... | 11/09/1993 |
| 5257736 | Self-regulating air ventilation apparatus The present ventilating system is used for homes and buildings located in cold climate areas. The system includes a heat exchanger for extracting heat from the inside air discharged to the exterior and transferring said heat to the outside air admitted in... | 11/02/1993 |
| 5239834 | Auxiliary outside air refrigeration system The invention pertains to an auxiliary outside air refrigeration system for use in combination with a conventional refrigeration system to supply refrigeration to an enclosure whereby cold outside air is used as the cooling medium. A differential thermost... | 08/31/1993 |
| 5235866 | Rotary temperature control device A rotary temperature control device which includes a vent pulley, a control pulley having a bevel gear associated therewith, a flexible cable which extends from the control pulley to the vent pulley and a shaft having a pinion gear associated therewith fo... | 08/17/1993 |
