Control method of air conditioner and air conditioner

Abstract

The invention relates to the field of air conditioners, in particular to an air conditioner control method which comprises the steps that the real-time inner pipe temperature is obtained in a refrigeration mode or a dehumidification mode of an air conditioner; when the real-time inner pipe temperature T < inner pipe > within the first continuous time is smaller than or equal to T < anti-freezing entering >, the air conditioner is controlled to enter an anti-freezing protection program; when the inner pipe temperature T0 at the initial operation moment within the second continuous time is different from the real-time inner pipe temperature Tinner pipe and the indoor environment temperature Tinner ring is different from the real-time inner pipe temperature Tinner pipe, the air conditioner is controlled to enter a fluorine-lacking protection program; and in the heating mode of the air conditioner, the real-time inner pipe temperature is obtained, and when the real-time inner pipe temperature T inner pipe is larger than or equal to T and overload enters, the air conditioner is controlled to enter an overload protection program. Overload protection, anti-freezing protection and fluorine deficiency protection can be carried out at proper time, the reliability of the air conditioner is improved, and the service life of the air conditioner is prolonged.

Description

technical field [0001] The invention belongs to the field of air conditioners, in particular to an air conditioner control method and an air conditioner Background technique [0002] Since the fixed-frequency air conditioner cannot adjust the frequency, and the outdoor unit has no main control board, temperature sensing package, and pressure sensor, the protection function of the air conditioner can only simply control the start and stop of the compressor and fan. R32 refrigerant air conditioners are more and more widely used in the market because of their economical, environmentally friendly and efficient features. Compared with R410A refrigerant, when R32 refrigerant is in heating operation, the temperature of the inner evaporator decays very quickly. The high-temperature refrigerant on the inlet side, after 1U, the temperature decays by less than 50%, which is very unfavorable for entering overload protection, so that the unit Long-term operation under high pressure and ...

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Problems solved by technology

[0004] However, in the cooling and heating modes, the circulation direction of the refrigerant is opposite (that is, the inlet of the refrigerant entering the evaporator is the outlet of the heating during cooling), so the indoor unit only uses one inner tube temperature sensing bulb and the overload based on this Protection, antifreeze protection, fluorine deficiency protection logic has become more and more difficult to meet the needs of air conditioner reliability

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