US 12,435,884 B2
Induced draft fan and air conditioning system
Jie Huang, Xiamen (CN)
Assigned to Xiamen Longwuchun Technology Co., Ltd, Xiamen (CN)
Filed by Xiamen Longwuchun Technology Co., Ltd, Xiamen (CN)
Filed on Apr. 25, 2024, as Appl. No. 18/646,187.
Claims priority of application No. 202420283756.0 (CN), filed on Feb. 6, 2024.
Prior Publication US 2025/0251150 A1, Aug. 7, 2025
Int. Cl. F24F 1/0284 (2019.01); F04D 25/08 (2006.01); F04D 25/16 (2006.01); F04D 27/00 (2006.01); F04D 29/52 (2006.01)
CPC F24F 1/0284 (2019.02) [F04D 25/08 (2013.01); F04D 25/166 (2013.01); F04D 27/001 (2013.01); F04D 29/522 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An induced draft fan, comprising a fan main body, a first temperature sensor and a second temperature sensor;
wherein the fan main body comprises an adapter connection line extending outward from the fan main body, a terminal end of the adapter connection line is provided with a connector, the first temperature sensor is mounted to the connector away from the fan main body, and a sensing probe of the first temperature sensor is exposed, the first temperature sensor is configured to detect ambient indoor temperature remote from the fan main body, and the second temperature sensor is configured to detect air temperature inside the fan main body or inside a pipeline, and an accurate control of the fan main body is realized by comparing a value of the ambient indoor temperature and a value of the air temperature inside the fan main body or inside the pipeline;
the first temperature sensor is electrically connected to a control circuit board inside the fan main body; and
the second temperature sensor is disposed inside the fan main body and faces towards an air inlet end of the fan main body, and is electrically connected to the control circuit board inside the fan main body.