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EP-4551872-B1 - DUCTED VENTILATION SYSTEM, PARTICLE COLLECTION UNIT AND METHOD

EP4551872B1EP 4551872 B1EP4551872 B1EP 4551872B1EP-4551872-B1

Inventors

  • KHOURY, ELIANE
  • VONS, Vincent Adrian
  • GEERINCKX, Louis-Pierre

Dates

Publication Date
20260506
Application Date
20230707

Claims (15)

  1. Ducted ventilation system (100) comprising a duct provided with a particle collection unit (800) comprising an ionisation section (102) and a particle collection section (104) located downstream the ionisation section (102), wherein the particle collection section is configured for removing particles from air flowing through the duct, characterized in that , the ionisation section comprises one or more ionisation members (102A, 102B, 102C, 102D) and the particle collection section comprises corresponding one or more particle collection members (104A, 104B, 104C, 104D), wherein each ionisation member is attached to a corresponding particle collection member to form a slat element that is rotatable about a rotational axis (108) between a first position wherein air flowing through the duct mainly flows through the one or more ionisation members and one or more particle collection members and a second position wherein the air mainly flows along the one or more ionisation members and particle collection members.
  2. Ducted ventilation system of claim 1, wherein the particle collection unit comprises at least two slat elements forming a slat structure with substantially parallel rotational axes.
  3. Ducted ventilation system according to claim 2, wherein each slat element is individually rotatable about its rotational axis.
  4. Ducted ventilation system according to any one of the preceding claims, wherein the rotational axis substantially coincides a central body axis of a particle collection member.
  5. Ducted ventilation system according to any one of the preceding claims, wherein each particle collection member has a rectangular shape, wherein its rotational axis is along a length side of the rectangular shape.
  6. Ducted ventilation system according to any one of the preceding claims, comprising an actuator system to move the one or more slat elements between the first position and the second position, wherein in the event of an interruption of power supplied the actuator system; the actuator system moves the one or more slat elements into the second position.
  7. Ducted ventilation system according to claim 6, wherein the actuator system comprises a corresponding actuator element for each of the one or more slat elements to rotate each slat element individually, preferably wherein, in the event of an interruption of power supplied to an actuator element, the slat element corresponding to said actuator element is moved into the second position.
  8. Ducted ventilation system according to any one of the claims 6 - 7, further comprising a control unit to control the actuator system in response to at least one signal from a sensor taken from a group comprising: particle sensor, CO sensor, CO 2 sensor, temperature sensor, odor sensor, NOx sensor, O2-Sensor, and volumetric flow rate sensor.
  9. Ducted ventilation system according to any one of the claims 6 - 8, further comprising a control unit configured to interrupt the power supplied to the actuator system.
  10. Ducted ventilation system according to any one of the claims 6 - 9, wherein the actuator system and the ionisation section are coupled to the control unit such that the control unit can simultaneously interrupt the power supplied to the actuator system and ionisation section.
  11. Ducted ventilation system according to any one of the claims 6 - 10, wherein power is supplied to the ionisation section as soon as an angle difference between the current rotation angle of the slat members becomes less than a predetermined angle value.
  12. Ducted ventilation system according to any one of the preceding claims, further comprising a valve section (114), wherein the particle collection unit is upstream the valve section.
  13. Ducted ventilation system according to any one of the preceding claims, wherein the particle collection section and ionization section are coupled to form a filter valve for particles that in operation runs through said air duct, said filter valve comprising a series of aligned slats substantially in a particle collection plane, the slats having a longitudinal axis and which are rotatable about a slat rotational axis, wherein the slats have a closed slat position in which the slats together close off the air duct for particles, and an open slat position in which the slats allow particles to flow through the air duct downstream the particle collection section.
  14. Ducted ventilation system according to any one of the preceding claims, wherein the particle collection section comprises one or more particle collection elements taken from a group comprising: a fiber dust filter element, an actively charged electrostatic filter element, an electret filter element or an electrostatic precipitator element using charged conductive plates or sheets of any form, for instance flat plates, honeycomb, bent or wavy sheets.
  15. A method for a ducted ventilation system of a building, comprising: providing a particle collection unit (800) according to claim 1 in a duct of the ducted ventilation system, rotating the one or more particle collection members (104A, 104B, 104C, 104D) in a first position when the ducted ventilation system is in an operating status to remove particulate material from a flow of air through a duct (112); and, rotating at least one of the one or more particle collection members in a second position when the ducted ventilation system is in another operating status.

Description

TECHNICAL FIELD The invention relates to a ducted ventilation system. The invention further relates to a method for a ducted ventilation system. BACKGROUND ART Air ducts or air channels or air shafts are used for ventilation. These air ducts can be provided with many devices and systems for actuating air in the air ducts, heat exchangers, fans, valves and doors, filters, safety or rain gratings, and the like. EP1434012A2 discloses air purifier with HEPA filter. An air purifier discharges air directly to a room without forcing the air to pass through a HEPA filter when the level of contaminations in the air, such as dust particles, is determined to be sufficiently low. The air purifier thus minimizes air pressure loss and attenuates operational noise caused by the HEPA filter. In an embodiment the HEPA filter is moved between a closed (in use) state and an open (bypassed) state. Air duct systems for large constructions, like air ducts and ventilation shafts that are used for instance for parking garages, are dimensioned for the specific building to meet the desired specification with regard to ventilation capacity and safety. For large air duct systems, the maximum volume flow rate is defined by regulations to suck sufficient air out of a space or to blow sufficient air into the space in case of extreme high concentration of pollutants or in case of fire, in order to remove smoke and increase visibility for occupants and emergency services. Furthermore, fire dampers and valves are installed in the ducts to prevent the fire in one space from spreading through the ventilation system to another space. These requirements in turn determine the minimum required capacity of the fan and the minimum dimensions of a duct. In order not to increase the costs too much, the capacity of a ventilator will be slightly above this minimum capacity and in order not to lose valuable indoor space the dimensions of the ducts will be slightly above the minimum dimensions. To avoid malfunctions of the ducted ventilation systems, the fire dampers, valves and any other component located in a channel of the system require regular preventive maintenance. This requires them to be accessible to a service technician. In order to reduce air pollution from extracted air from, for instance, parking garages, air filters are planned to be installed in existing air duct shafts of parking garages. The air filters have to reduce the particulate material, pollutants, NOx, fine particles and fine dust, generated by engines in a building, in the air blown out of the building. However, adding features in an air duct, especially filters, will increase the air resistance through the system and the power of the fan may no longer be sufficient to achieve the desired flow rate in maximum ventilation mode. The existing fan would then have to be replaced by a more powerful one, something which is very costly and, very often, not possible due to the increased size and electrical power consumption of a more powerful fan. The term particulates - also known as atmospheric aerosol particles, atmospheric particulate matter, particulate matter (PM) or suspended particulate matter (SPM) - are microscopic particles of solid or liquid matter suspended in the air. The term aerosol commonly refers to the particulate/air mixture, as opposed to the particulate matter alone. Sources of particulate matter can be natural or anthropogenic. They have impacts on climate and precipitation that adversely affect human health, in ways additional to direct inhalation. Types of atmospheric particles include suspended particulate matter; thoracic and respirable particles; inhalable coarse particles, designated PM10, which are coarse particles with a diameter of 10 micrometers (µm) or less; fine particles, designated PM2.5, with a diameter of 2.5 µm or less; ultrafine particles, with a diameter of 100 nm or less; soot and Black Carbon. The IARC and WHO designate airborne particulates as a Group 1 carcinogen. Particulates are the most harmful form of air pollution due to their ability to penetrate deep into the lungs, blood streams and brain, causing health problems including heart attacks, respiratory disease, and premature death. In general, dust collection systems are used to control particulate concentration in the airflow internally and/or at the air outlet(s). These systems generally include inertial collectors (cyclonic separators); fabric filter collectors (baghouses), electrostatic filters used in facemasks, wet scrubbers, electrostatic precipitators, and combinations thereof. Electrostatic filtering requires an ioniser where particles are charged and an electrostatic filter where charges particles are captured. The ioniser and electrostatic filter are, in flow direction separated from one another. The ioniser is usually upstream of the electrostatic filter. The electrostatic filter is consequently downstream of the ioniser. Various components can often be hindering one another