| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 454238000 | Pressure regulation | 15 |
| 20080233860 | AIR HANDLING SYSTEM WITH SELF BALANCING AIR ENTRANCE DOOR - A self balancing air handling system for conditioning an interior space includes an air handling unit having an outlet for supplying conditioned air to the space, an entrance providing an access from an exterior space to the interior space, an air plenum surrounding said space, and an inlet for returning air from said plenum to said air handling unit wherein said air handling unit supplies said conditioned air under conditions providing a positive pressure differential at said entrance between the interior space and the exterior space thereby limiting infiltration air into the interior space. | 09-25-2008 |
| 20080287050 | Integrated Explosion Protection Apparatus For Supervision And Control Of Advanced Electrical Apparatuses - The invention refers to an explosion protection system for electrical apparatuses and machineries, such as manipulators or industrial robots, located in hazardous environments, i.e. environments containing explosive concentrations of inflammable gases, dusts or vapours, comprising an air supply that applies internal pressurized air into an explosion proof enclosure. The invention is achieved by a flow- and pressure sensor arranged as an integrated unit and designed to stand high dynamic forces by having low inertia, balanced arrangement of moving parts and a movement guide, e.g. an axle with a support guide, with low friction. | 11-20-2008 |
| 20090047894 | PRESSURE CONTROL WITH COARSE AND FINE ADJUSTMENT - A pressurization control system configured to regulate air pressure within a space includes a first damper fluidly coupled to an air supply, the first damper configured to control delivery of an air flow, and a second damper having an operating range, the second damper fluidly coupled to the air supply and the first damper, the second damper configured to supplement delivery of the air flow. The pressurization control system further includes a room controller configured to provide a control signal to the first and second dampers, wherein the control signal drives the first damper to direct the air flow towards the operating range, and wherein the control signal drives the second damper to direct the air flow towards a set point. | 02-19-2009 |
| 20110065372 | Recreation Room and Method of Adjusting the Room Atmosphere - The invention concerns a method of adjusting a room air in a first room wherein the room air is supplemented continuously or at recurring intervals of time by nitrogen or a nitrogen-bearing, carbon dioxide-poor gas mixture in such a way that the proportion of oxygen in the room air is less than 20.9% by volume and the proportion of carbon dioxide in the room air is less than 1% by volume, wherein at the same time at least a slight overpressure in relation to an outside atmosphere surrounding the room is set in the room. | 03-17-2011 |
| 20110111688 | SELF CONTAINED HEATING/COOLING ROOF TOP UNIT WITH TWO STAGE RELIEF HOOD - A self-contained air unit for installation on a roof top of a building has a pressure relief opening that is independent of the air circulation system of the unit. The air circulation system has a first blower and the pressure relief opening has a damper system that connects the pressure relief opening to ambient air through two passages. One of the passages contains a second blower to exhaust air from the air circulation system and from the independent pressure relief opening simultaneously. A two-stage pressure relief hood is provided for use with a self-contained air unit. | 05-12-2011 |
| 20120058717 | Overpressure-based System to protect vertical evacuation routes against smoke infiltration - The present Invention relates to an overpressure-based system applied to protect vertical evacuation routes against smoke infiltration, that can be used in the objects such as hospitals or laboratories, where it is necessary to accurately maintain the pressure difference between two zones on a preset level, characterised in that the system's controlling & working unit | 03-08-2012 |
| 20120071079 | Positive Air Pressure Isolation System - An air-pressure-control system, the system comprising a system inlet, a system outlet, and a variable-speed fan configured to operate at a speed. A motor controller in communication with the fan is configured to control the speed of the fan. A differential-pressure transducer configured to monitor an air pressure at the system inlet and an air pressure at the system outlet. A closed-loop pressure controller in communication with the motor controller and differential-pressure transducer, wherein the pressure controller is configured to vary the speed of the fan based on the pressure differential between the inlet and outlet of the system, thereby controlling a pressure within a space. An ultraviolet kill chamber may be disposed between the inlet and outlet to expose airborne particulate to UV radiation. The system may also have a filter located within an air-flow path between the system inlet and system outlet. | 03-22-2012 |
| 20120282853 | MAKE-UP AIR SYSTEM AND METHOD - Embodiments of the invention provide a system capable of reducing negative pressure. The system includes a make-up air system that can be configured and arranged to be installed within a structure, such as a building. The system can also include a pressure switch that is configured and arranged to sense a pressure within an exhaust duct coupled to an exhaust device. The pressure switch can also be configured to communicate an activation signal and a deactivation signal to the make-up air system. In some embodiments, communication of the activation and deactivation signals can be at least partially dependent on the pressure within the exhaust duct. Moreover, the pressure switch can be configured and arranged to be retroactively coupled to at least one of the exhaust duct and the exhaust device. | 11-08-2012 |
| 20130005236 | AIR SUPPLY DAMPER FOR SEPARATELY SUPPLYING LEAKAGE AIR FLOW AND SUPPLEMENTARY AIR FLOW, METHOD FOR CONTROLLING THE SAME, AND SMOKE CONTROL SYSTEM UTILIZING THE SAME - Disclosed is a smoke control system provided in a high-rise building for separately supplying leakage air flow and supplementary air flow, including: a blowing means for supplying air into a building; a ventilating means having a leakage air flow supplying passage and a supplementary air flow supplying passage connected to the blowing means for introducing air; and an air supply damper connected to the leakage air flow supplying passage and the supplementary air flow supplying passage to supply air into each lobby of a building according to the leakage air flow and supplementary air flow. | 01-03-2013 |
| 20140080401 | CLIMATE CONTROL APPARATUS FOR A CLEANROOM LIVESTOCK BUILDING - A climate control apparatus for a cleanroom livestock building includes a supply air unit, comprising a supply air conveyor device, an exhaust air unit comprising an exhaust air conveyor device, a temperature sensor, an air pressure sensor, and a climate control unit. The climate control apparatus is adapted to reduce the volume of air conveyed by the exhaust air unit whenever the air pressure detected by the air pressure sensor falls below a predetermined lower air pressure limit value, increase the volume of air conveyed by the exhaust air unit whenever the air pressure detected by the air pressure sensor exceeds a predetermined upper air pressure limit value, and increase the volume of air conveyed with the supply air unit when the temperature detected by the temperature sensor exceeds a predetermined first upper temperature limit value. | 03-20-2014 |
| 20150362205 | AIRFLOW-CONFIRMING HVAC SYSTEMS AND METHODS WITH VARIABLE SPEED BLOWER - Systems and methods are disclosed that involve controlling a variable-speed blower in a heating, ventilating, and air conditioning (HVAC) system to ensure the setting of a blower-proving switch to confirm airflow in a building. In one instance, a method involves ramping up the variable-speed blower so that the associated static pressure reaches a making point pressure of the blower-proving switch and then reducing the power to a desired power level. The method may also include maintaining the power level above a breaking point pressure. Other systems and methods are presented. | 12-17-2015 |
| 20160018120 | ROOM PRESSURE CONTROLLING SYSTEM AND ROOM PRESSURE CONTROLLING METHOD - A room pressure controlling system includes: a room pressure correction controlling portion that controls a supply air valve or an exhaust valve, whichever is operated as a room pressure controlling valve, so that a between-room differential pressure between an applicable facility and a reference room that is set to a reference room pressure will match a room pressure set point; an offset flow rate set point switching portion that switches an offset flow rate set point when an instruction has been received from an outside to switch the applicable facility between positive and negative pressure; and a room pressure set point switching portion that switches the room pressure set point in coordination with switching of the offset flow rate set point. | 01-21-2016 |
| 20160018121 | AIR FLOW RATE CONTROLLING SYSTEM AND AIR FLOW RATE CONTROLLING METHOD - A flow rate controlling system includes: a flow rate balance determining portion that determines a supply flow rate, regulated by a supply air valve, and a common exhaust flow rate, regulated by a common exhaust air valve, so that a difference between the supply flow rate and an exhaust flow rate, regulated by the common exhaust air valve, matches a set point; a valve monitoring portion that monitors the supply air valve, the common exhaust air valve, and a local exhaust air valve; and a flow rate changing portion that issues a flow rate changing instruction to the flow rate balance determining portion. When there is a fault in the supply air valve and/or the common exhaust air valve, the flow rate balance determining portion, upon receipt of the flow rate changing instruction from the flow rate changing portion, changes neither the supply nor common exhaust flow rate. | 01-21-2016 |
| 20160054024 | ERV Global Pressure Demand Control Ventilation Mode - An energy recovery ventilator includes first and second blowers, a pressure transducer and a controller. The first blower is configured to direct a first air stream into a first zone of an enclosure. A second blower configured to direct a second air stream into a second zone of the enclosure. A pressure transducer is configured to determine internal air pressure within the enclosure. A controller is configured to control the first blower and/or the second blower in response to the internal air pressure. | 02-25-2016 |
| 20160252265 | ROOM PRESSURE CONTROL SYSTEM AND ROOM PRESSURE CONTROL METHOD | 09-01-2016 |
