A kind of constant temperature and dehumidification type air conditioner and its control method

Abstract

A constant temperature and dehumidification type air conditioner and a control method thereof. The air conditioning system includes an outdoor heat exchanger, an outdoor fan, an outdoor electronic expansion valve, an indoor heat exchanger, an indoor fan, an electric auxiliary heat, a first electronic expansion valve, and a second electronic expansion valve. valve, a first temperature sensor, a second temperature sensor and an ambient temperature sensor, wherein the first temperature sensor is used to detect the copper pipe inlet temperature T2 of the indoor heat exchanger, and the second temperature sensor is used to detect The control method includes steps S1 to S5: by controlling the rotational speed of the outdoor fan in step S2, controlling the opening of the outdoor electronic expansion valve in step S3, and controlling the second electronic expansion valve in step S4 The opening degree of the expansion valve, and in step S5, the electric auxiliary heat is turned on and the output power of the electric auxiliary heat is adjusted, so as to increase the outlet air temperature and keep the indoor temperature constant during the dehumidification operation of the air conditioning system.

Description

Technical field [0001] The invention involves the technical field of air -conditioning dehumidification, especially a constant temperature dehumidification air conditioner and its control method. Background technique [0002] Meiyu refers to the weather and climate phenomenon that occurred in a certain area and a certain season, which is a unique weather and climate phenomenon in East Asia. In the rainy weather, the indoor is humid, and the wall floor and the surface of the furniture are prone to gel, which makes people uncomfortable. People usually use air -conditioning dehumidification or dehumidifier dehumidification. Generally, the dehumidification function of the air conditioner is to adjust the indoor fan to low in the refrigeration mode. At present, although the refrigeration mode can achieve dehumidification function with low wind speeds, it is small and slow dehumidification; and in the rainy season, the temperature is low, and most of the time is below 20 ° C. At this t...

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Problems solved by technology

At present, although the dehumidification function can be achieved in the cooling mode with low wind speed, the dehumidification capacity is small and the dehumidification is slow; moreover, during the rainy season, the temperature is low, and most of the time is below 20°C. At this time, the air conditioner blows out cold air for dehumidification. , the more dehumidified the colder, the physical comfort is quite poor

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