Self-cleaning control method of air-conditioning system

[0029]In the following, the present invention will be further described in conjunction with the embodiments.

[0030]A self-cleaning control method for an air-conditioning system is suitable for the following air-conditioning systems. An air detection device can be installed at the air inlet of the air-conditioning system to detect TSP, PM10, PM2.5 or PM1 and other particulate matter indicators in the air. The control device can choose products such as Tianjia series air quality detectors, and can work when the air conditioning unit is turned on or off.

[0031]The self-cleaning control method of the air conditioning system of the present invention includes the following steps:

[0032]1) The indoor unit is self-cleaning;

[0033]1.1) The air detection device detects the air quality of the indoor return air;

[0034]1.2) When any value of TSP, PM10, PM2.5 or PM1 in the indoor air is higher than the standard value, or sulfur dioxide is higher than the standard value, go to step 1.3); otherwise, go to step 1.1);

[0035]1.3) When the air conditioning fresh air valve is closed, go to step 1.4); otherwise, go to step 1.7);

[0036]1.4) If the air conditioning unit is on, go to step 1.5); if the air conditioning unit is off, go to step 1.6);

[0037]1.5) Before the end of this run, enter the frost-defrost mode; then, end this run;

[0038]1.6) The next time it is turned on, first enter the frost-defrost mode; then, switch to the operating mode specified by the user;

[0039]1.7) If the air conditioner is on, go to step 1.8); if the air conditioner is off, go to step 1.9);

[0040]1.8) Before the end of the operation, the indoor fan is forced to reverse to remove dust from the indoor heat exchanger and filter; after N seconds, the operation ends;

[0041]1.9) The next time it is turned on, the indoor fan is forced to reverse to remove dust from the indoor heat exchanger and filter; after N seconds, it will switch to the user-specified operating mode;

[0042]2) Self-cleaning of outdoor unit;

[0043]2.1) The air detection device detects the air quality of the indoor return air;

[0044]2.2) When any value of TSP, PM10, PM2.5 or PM1 in the indoor air is higher than the standard value, or sulfur dioxide is higher than the standard value, go to step 2.3); otherwise, go to step 2.1);

[0045]2.3) If the air conditioning unit is on, go to step 2.4); if the air conditioning unit is off, go to step 2.5);

[0046]2.4) Before the end of this operation, the outdoor fan is forced to reverse to realize the dust removal of the outdoor heat exchanger; after N seconds, the operation is ended;

[0047]2.5) At the next startup, the outdoor fan is forced to reverse to remove dust from the outdoor heat exchanger; after N seconds, it will switch to the user-specified operating mode.

[0048]The frosting-defrosting mode in step 1.5) or step 1.6) is: the unit is forced to enter the cooling mode, the operating frequency of the outdoor unit compressor is increased to the highest level, and the air volume of the indoor unit is reduced to the lowest level, so that the surface of the indoor heat exchanger The temperature is lower than 0°C, which facilitates the formation of a frost layer on the surface of the heat exchanger: after 3-5 minutes, the outdoor unit compressor stops, and after another 1 minute, the indoor unit fan stops to melt the frost layer on the surface of the indoor heat exchanger. The dust on the surface of the heat exchanger can be taken away by the water flow after the frost layer has melted, and the heat exchanger can be cleaned.

[0049]The N is a set value, which depends on the air quality, and can be set to about 60 seconds.

[0050]Step 2.5) of the present invention is also applicable to the snow removal operation of the outdoor unit in snowy weather. Specifically: detect the outdoor temperature and humidity. When the outdoor temperature is lower than 0°C and the humidity is high, it is determined that the outdoor may be in a snowy state. At this time, run step 2.5) to blow away the snow on the outdoor unit to ensure that the unit is normal run.

[0051]The invention judges whether to perform self-cleaning by detecting indoor air quality, which effectively improves the timeliness and accuracy of judgment. At the same time, through a variety of cleaning methods, it fully meets the cleaning requirements of indoor and outdoor units, greatly improving the self-cleaning effect of the air conditioning system, and better meeting the needs of the market.

[0052]The parts not involved in the present invention are the same as the prior art or can be realized by using the prior art.