Air conditioner and anti-freezing control method thereof
A control method and anti-freezing technology, applied in heating and ventilation control systems, heating and ventilation safety systems, mechanical equipment, etc., can solve the problem of insensitivity in triggering anti-freezing protection, and achieve the effect of timely and sensitive triggering
Active Publication Date: 2020-05-22
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +1
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Problems solved by technology
[0004] The present invention provides an air conditioner and its anti-freezing method, aiming to solve the disadvantage of insensitive trigger anti-freezing protection caused by using a single temperature sensor to sense the coil temperature in the existing air conditioner
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[0051]The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. Herein, various embodiments may be referred to individually or collectively by the term "invention", which is for convenience only and is not intended to automatically limit the scope of this application if in fact more than one invention is disclosed. A single invention or inventive concept. Herein, relational terms such ...
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The invention discloses an air conditioner and an anti-freezing control method thereof, and belongs to the technical field of air conditioners. The control method comprises the following steps of obtaining the temperature of a refrigerant inlet pipe and the temperature of a middle pipe of an indoor heat exchanger when the air conditioner operates in a cooling mode; determining whether the preset anti-freezing conditions are met or not according to the minimum pipe temperature between the temperature of the refrigerant inlet pipe and the temperature of the middle pipe of the indoor heat exchanger; in response to the minimum pipe temperature meeting the preset anti-freezing conditions, determining and controlling the air conditioner to be switched to a corresponding anti-freezing mode according to the minimum pipe temperature, wherein if the minimum pipe temperature meets a first temperature condition, the anti-freezing mode comprises the reduction of the frequency of a compressor; if the minimum pipe temperature meets a second temperature condition, the anti-freezing mode comprises the starting of an electric auxiliary heating device of an indoor unit; if the minimum pipe temperature meets a third temperature condition, the anti-freezing mode comprises the control to the shutdown of the air conditioner; and the temperature conditions corresponding to different minimum pipe temperatures are different. The air conditioner and the anti-freezing control method provided by the invention can more sensitively trigger own anti-freezing protection in time.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner and its anti-freezing control method. Background technique [0002] When the air conditioner is in cooling or dehumidification operation, due to the temperature angle of the refrigerant entering the indoor heat exchanger of the indoor unit, the outer surface of the indoor heat exchanger is always at a low temperature. When the indoor air flows through the indoor heat exchanger, The water vapor in the air is easy to condense into dew or even frost on the indoor heat exchanger, causing the indoor heat exchanger of the indoor unit to freeze, which in turn affects the cooling effect of the air conditioner, making its cooling or dehumidification capacity weaker and weaker. [0003] In view of the freezing phenomenon of the indoor heat exchanger of the air conditioner, the anti-freezing implementation method mainly adopted by the existing air conditioner is ...
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IPC IPC(8): F24F11/43F24F11/64F24F11/65F24F140/20F24F140/50
CPCF24F11/43F24F11/64F24F11/65F24F2140/20F24F2140/50
Inventor 许文明
Owner QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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