Fan detection method, fan driving device and air conditioner
By setting up a detection unit on the printed circuit board of the air conditioner and using a resistor network to multiplex the processor sampling port, the problem of scarce MCU port resources is solved, and low-cost fan type detection is achieved.
CN114576190BActive Publication Date: 2026-06-12FOSHAN SHUNDE MIDEA ELECTRONICS TECH CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FOSHAN SHUNDE MIDEA ELECTRONICS TECH CO LTD
- Filing Date
- 2020-12-01
- Publication Date
- 2026-06-12
AI Technical Summary
⚠Technical Problem
In the existing technology, when the outdoor unit control board of an air conditioner needs to detect the type of AC fan and DC fan drive circuit, it usually increases the I/O ports of the MCU, which leads to a shortage of chip resources and an increase in production costs.
⚗Method used
A detection unit is set on the printed circuit board. By multiplexing the sampling port of the DC fan drive circuit of the processor and combining it with a resistor network, the fan type can be detected without occupying an additional processor port.
🎯Benefits of technology
This technology enables efficient detection of fan type without increasing processor I/O ports, thus reducing the cost of fan inspection.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN114576190B_ABST
Abstract
The application discloses a fan driving device, comprising: a printed circuit board, which is provided with connection lines of a direct-current fan driving circuit, connection lines of an alternating-current fan driving circuit and connection lines of a detection unit; a component group welded on the connection lines of the direct-current fan driving circuit constitutes the direct-current fan driving circuit; a component group welded on the connection lines of the detection unit constitutes the detection unit, the direct-current fan driving circuit comprises a sampling unit, a first end of the sampling unit is a sampling point of the direct-current fan driving circuit, and a second end is grounded; the detection unit comprises a power supply end connected with a positive electrode of a power supply, a fan sampling end connected with the sampling point of the direct-current fan driving circuit and a detection end; and a processor, which comprises a sampling port connected with the detection end, judges a fan type according to a voltage of the sampling port. The sampling port for sampling the direct-current fan driving circuit is multiplexed to detect the fan type, port resources of the processor are reduced, and detection cost is reduced.
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