May 2021 issue


  1. Pandemic-ready airflow control system for hospitals
  2. A small-diameter (DN150) venturi valve for constant air volume that provides safety and security in the coronavirus era
  3. Azbil’s cloud operation infrastructure for providing safe and secure services
  4. A work-site record-keeping service supporting “new normal” ways of working and business transformation
  5. Improving the accuracy of valve diagnosis and facilitating more efficient operation through the provision of cloud services
  6. Research on occupant-centric HVAC control: A field study on the effects of introducing HVAC control that is respon-sive to occupants’ thermal sensations
  7. A new technology for visualizing network topologies
  8. Facial recognition and thermography solutions by using the latest AI technology
  9. Model H3C adjustable proximity sensor’s auto-tuning and visualization of excess gain yields faster adjustment and more reliable operation


1. A home central air conditioning system that is effective against viruses and bacteria
Naohiro Ishikawa, Toshimaru Iguchi, Atsushi Tamura
We verified that the electronic air cleaner installed in the whole-building air-conditioning system removes aerosols containing viruses and bacteria for the prevention of airborne infection. As a result, we consider the electronic air cleaner to be effective against viruses and bacteria due to its ability to collect dust at the particle size of a virus. In addition, we confirmed that living spaces where the system is installed do not become “poorly ventilated closed spaces” due to the system’s heat-exchange type of ventilation.
2. Miniaturization of humidity element leads to advances in sensor unit technology
Tatsufumi Yano, Masahiro Sugiyama
Duct temperature-humidity sensors require regular maintenance in order to maintain performance. To reduce the required man-hours, we developed a new compact humidity element (FP5™) and made it into a sensor unit to replace our existing one. Additionally, in order to compensate for the decreased S/N ratio resulting from miniaturization of the humidity element, we digitized the measurement signal processing, allowing us to develop a temperature-humidity sensor that solves problems in design and production control.

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