A real-time humidity estimation method for an air-conditioned room and an air conditioner

Abstract

Disclosed is a real-time humidity calculation method for an air-conditioned room, wherein the method comprises: during a working process of an air-conditioner, invoking a compressor operating frequency which is fed back, and according to the compressor operating frequency, a compressor displacement and a refrigerant density, calculating the amount of coolant flowing in a sampling period (S1); collecting a compressor exhaust gas temperature and an outdoor defrosting sensor detection temperature to calculate a first temperature difference (S2); invoking the specific heat of a refrigerant, and calculating the quantity of heat released outdoors by a coolant within a unit of time (S3); invoking an indoor fan wind speed which is fed back, and according to the indoor fan wind speed, calculating an indoor fan blast volume in the sampling period, and calculating an air enthalpy value change in the sampling period (S4); collecting an indoor temperature and an indoor coil pipe temperature to calculate a second temperature difference (S5); and searching an enthalpy-humidity curve graph, and determining a real-time humidity of a current air-conditioned room (S6). By means of the solution, the humidity of an air-conditioned room can be obtained under the condition of no hardware device being added, and the temperature and the humidity are further cooperatively controlled using inferred values, thus having the advantages of being practical and highly precise.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for calculating real-time humidity in an air-conditioned room, and an air conditioner applying the method. Background technique [0002] During the operation of the air conditioner, especially during the cooling operation, it is easy to have a significant impact on the indoor air humidity. For example, when the difference between the set temperature and the indoor temperature is large, the compressor runs at high frequency, the temperature of the indoor coil is lower than the dew point temperature, the indoor water vapor is continuously condensed into water, the indoor humidity drops significantly, and the air dryness affects the comfort of users degree. When the difference between the set temperature and the indoor temperature is small, the compressor operates at low frequency, the indoor coil temperature is higher than the dew point temperature, the indoor te...

AI Technical Summary

Problems solved by technology

It is not difficult to see that in the above control method, at least one actual humidity detection unit, such as a humidity sensor, must be used to detect the actual humidity of the air-conditioned room, which requires additional sensing equipment in the air conditioner, further increasing the cost of the air conditioner

Moreover, in the control method of the above-mentioned air conditioner, the control of humidity and temperature is relatively independent, and the control process simplifies the connection between indoor temperature and indoor humidity, which further affects the accuracy of the control process.

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