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1. (WO2018040618) METHOD AND SYSTEM FOR DETECTING DIRT BLOCKAGE OF HEAT EXCHANGER OF AIR CONDITIONER, AND AIR CONDITIONER

Pub. No.:    WO/2018/040618    International Application No.:    PCT/CN2017/084770
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Thu May 18 01:59:59 CEST 2017
IPC: F24F 11/02
Applicants: GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD.
广东美的制冷设备有限公司
MIDEA GROUP CO., LTD.
美的集团股份有限公司
Inventors: YUAN, Guang
袁光
LI, Hongtao
李洪涛
SU, Lizhi
苏立志
Title: METHOD AND SYSTEM FOR DETECTING DIRT BLOCKAGE OF HEAT EXCHANGER OF AIR CONDITIONER, AND AIR CONDITIONER
Abstract:
Disclosed are a method and system for detecting dirt blockage of a heat exchanger of an air conditioner, and an air conditioner. The method comprises the following steps: acquiring the degree of dirt blockage of a dust filter screen at a first fan speed; acquiring the pressure difference between two sides of the dust filter screen to which the degree of dirt blockage of the dust filter screen corresponds at the first fan speed; acquiring the difference between the pressure on the leeward side of the heat exchanger and the pressure on the windward side of the dust filter screen at the first fan speed; generating the pressure difference between two sides of the heat exchanger; and acquiring the level of dirt blockage of the corresponding heat exchanger according to the pressure difference between the two sides of the heat exchanger and the first fan speed. With the method, respective dirt blockage conditions of the dust filter screen and the heat exchanger can be detected simultaneously, such that the air conditioner can be controlled independently, for example, using corresponding cleaning modes to respectively clean the dust filter screen and the heat exchanger at different times. Different control modes of the air conditioner can also be used according to different levels of dirt blockage of the heat exchanger.