US 12,228,308 B2
Fan unit, fan unit system, and air treatment system
Shuuichi Tanaka, Osaka (JP); Akira Komatsu, Osaka (JP); Toru Fujimoto, Osaka (JP); Yoshiteru Nouchi, Osaka (JP); Kouji Tatsumi, Osaka (JP); Ryouta Suzuki, Osaka (JP); and Taishi Nakashima, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/603,792
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
PCT Filed Apr. 15, 2020, PCT No. PCT/JP2020/016621
§ 371(c)(1), (2) Date Oct. 14, 2021,
PCT Pub. No. WO2020/213657, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 2019-077305 (JP), filed on Apr. 15, 2019; application No. 2019-116144 (JP), filed on Jun. 24, 2019; and application No. 2019-237836 (JP), filed on Dec. 27, 2019.
Prior Publication US 2022/0214072 A1, Jul. 7, 2022
Int. Cl. F24F 3/00 (2006.01); F04D 25/16 (2006.01); F04D 27/00 (2006.01); F24F 3/044 (2006.01); F24F 11/77 (2018.01); F24F 11/84 (2018.01); F24F 11/86 (2018.01); F24F 11/89 (2018.01); F25B 49/02 (2006.01); F24F 110/30 (2018.01); F24F 110/40 (2018.01)
CPC F24F 3/001 (2013.01) [F04D 25/166 (2013.01); F04D 27/004 (2013.01); F24F 3/044 (2013.01); F24F 11/77 (2018.01); F24F 11/84 (2018.01); F24F 11/86 (2018.01); F24F 11/89 (2018.01); F25B 49/022 (2013.01); F24F 2110/30 (2018.01); F24F 2110/40 (2018.01); F25B 2313/0314 (2013.01); F25B 2313/0315 (2013.01); F25B 2700/21151 (2013.01); F25B 2700/21152 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An air treatment system for applying predetermined treatment to air to be supplied to an air conditioned space, the air treatment system comprising:
a plurality of fan units that are capable of changing air flow volume of air to be supplied to the air conditioned space;
an air treatment unit that is connected to the plurality of fan units by a corresponding plurality of ducts, and includes a blower that sends treated air that has been subjected to predetermined treatment through the plurality of ducts to the corresponding plurality of fan units; and
a main controller, wherein
the air treatment unit includes
a use side air flow volume detection sensor that is connected to the main controller and detects air flow volume of the air sent by the blower through the plurality of ducts; and
a use side air temperature sensor that is connected to the main controller and detects a temperature of the air sent from the blower to the plurality of ducts,
each of the plurality of fan units includes
a fan with variable rotation speed;
an air flow volume detector that detects air flow volume of the fan or equivalent air flow volume that is a physical quantity corresponding to the air flow volume of the fan;
a unit casing that fully encloses the fan and the air flow volume detector, and has an intake port connected to one of the plurality of ducts, the air flow volume detector detecting the air flow passing through the unit casing via the intake port; and
a controller that controls a rotation speed of the fan, wherein
the main controller sends a command value of air flow volume to the controller of each of the plurality of fan units,
the controller of each of the plurality of fan units controls the rotation speed of the fan on a basis of a command value of the flow volume of the fan given from the main controller and a detected value of the air flow volume or the equivalent air flow volume detected by the air flow volume detector,
the controller of each of the plurality of fan units controls the rotation speed of the fan so that the air flow volume indicated in the detected value approaches the command value,
the controller of each of the plurality of fan units reduces the rotation speed of the fan in a first operation in which the air flow volume indicated in the detected value is greater than the command value, and
the controller of each of the plurality of fan units increases the rotation speed of the fan in a second operation in which the air flow volume indicated in the detected value is smaller than the command value.