Patents by Inventor Simo Hammo

Simo Hammo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for tuning a ventilation system
    Patent number: 9298192
    Abstract: A method includes selecting the branch of a ventilation system with the greatest pressure loss, opening a control valve in the selected branch and closing control valves in all other branches, controlling a fan to produce the desired air flow rate into the selected branch by using fan characteristic shaft power to air flow rate curves, and a shaft power estimate from the frequency converter and by adjusting the rotational speed of an electric motor to achieve the desired air flow rate, calculating the fan pressure corresponding to the desired air flow rate from fan characteristic fan pressure to air flow rate curves, saving the calculated fan pressure as a reference pressure, and adjusting the control valves in each of the remaining branches so that the desired air flow rate to each branch is delivered while the fan is controlled by the frequency converter to produce the reference pressure.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: March 29, 2016
    Assignee: ABB TECHNOLOGY OY
    Inventors: Jussi Tamminen, Jero Ahola, Tero Ahonen, Simo Hammo
  • METHOD FOR TUNING A VENTILATION SYSTEM
    Publication number: 20130297079
    Abstract: A method includes selecting the branch of a ventilation system with the greatest pressure loss, opening a control valve in the selected branch and closing control valves in all other branches, controlling a fan to produce the desired air flow rate into the selected branch by using fan characteristic shaft power to air flow rate curves, and a shaft power estimate from the frequency converter and by adjusting the rotational speed of an electric motor to achieve the desired air flow rate, calculating the fan pressure corresponding to the desired air flow rate from fan characteristic fan pressure to air flow rate curves, saving the calculated fan pressure as a reference pressure, and adjusting the control valves in each of the remaining branches so that the desired air flow rate to each branch is delivered while the fan is controlled by the frequency converter to produce the reference pressure.
    Type: Application
    Filed: May 3, 2013
    Publication date: November 7, 2013
    Applicant: ABB Oy
    Inventors: Jussi TAMMINEN, Jero Ahola, Tero Ahonen, Simo Hammo