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Energy recovery ventilation smoke evacuation

  • US 10,344,994 B2
  • Filed: 05/22/2017
  • Issued: 07/09/2019
  • Est. Priority Date: 03/20/2012
  • Status: Active Grant
First Claim
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1. A control system for an energy recovery ventilation system that is configured to provide heating, ventilating, and/or air conditioning to at least one room of a building, comprising:

  • a smoke sensor configured to measure a level of smoke within the building and output a smoke level signal based on the level of smoke; and

    a controller configured to receive the smoke level signal, to operate the energy recovery ventilation system in a first mode of operation when the smoke level signal is below a predetermined value, and operate the energy recovery ventilation system in a second mode of operation when the smoke level signal is above the predetermined value, wherein operating the energy recovery ventilation system in the second mode of operation comprises;

    selecting a predetermined sequence from a plurality of predetermined sequences, wherein the plurality of predetermined sequences comprises;

    a purge sequence, wherein the purge sequence is performed by opening an exhaust air damper to exhaust stale air from the at least one room and opening an outside air damper to replace the stale air with fresh air directed into the at least one room;

    a pressurization sequence, wherein the pressurization sequence is performed by closing the exhaust air damper to achieve a positive pressure within the at least one room by directing the fresh air into the at least one room; and

    an exhaust sequence, wherein the exhaust sequence is performed by closing the outside air damper to achieve a negative pressure within the at least one room by exhausting the stale air from the at least one room; and

    controlling the operation of the energy recovery ventilation system to perform the predetermined sequence.

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