Patents by Inventor Michael D. Herwald

Michael D. Herwald 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).

  • AIR HANDLING UNIT WITH INDIRECT AIR-SIDE ECONOMIZER AND DECOUPLED VARIABLE SPEED SCAVENGER AND CONDENSER FAN CONTROL
    Publication number: 20200413571
    Abstract: A cooling system includes a housing containing indirect heat exchange and active refrigeration sub-systems to provide cooled process air to a space. The indirect heat exchange sub-system includes a horizontal plate-type heat exchanger having scavenger passages that are longer in one direction than process air passages are in a transverse direction. One group of compressors and associated condensers is located within the housing near a right end wall and another group is located near a left end wall. Process air fans are provided for directing process air from the space, through the heat exchanger, and back into the space. Scavenger fans direct scavenger air through the heat exchanger. At least two condenser fans are provided, one at the top of the housing near the right end wall and the other at the top of the housing near the left end wall.
    Type: Application
    Filed: June 27, 2019
    Publication date: December 31, 2020
    Inventors: Bradley J. Perdew, Michael D. Herwald
  • Air handling unit with indirect air-side economizer and decoupled variable speed scavenger and condenser fan control
    Patent number: 10869410
    Abstract: A cooling system includes a housing containing indirect heat exchange and active refrigeration sub-systems to provide cooled process air to a space. The indirect heat exchange sub-system includes a horizontal plate-type heat exchanger having scavenger passages that are longer in one direction than process air passages are in a transverse direction. One group of compressors and associated condensers is located within the housing near a right end wall and another group is located near a left end wall. Process air fans are provided for directing process air from the space, through the heat exchanger, and back into the space. Scavenger fans direct scavenger air through the heat exchanger. At least two condenser fans are provided, one at the top of the housing near the right end wall and the other at the top of the housing near the left end wall.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: December 15, 2020
    Assignee: Munters Corporation
    Inventors: Bradley J. Perdew, Michael D. Herwald