Controlling method and device of electronic expansion valves for air conditioner, computer product and air conditioner

Abstract

The invention discloses a controlling method and device of electronic expansion valves for air conditioner, a computer product and an air conditioner, and relates to the technical field of computers.The problem that flow distribution of refrigerants of indoor units are unbalanced once the indoor units are started up is solved. The controlling method of the electronic expansion valves of the air conditioner comprises the following steps: acquiring refrigerant saturated temperature detection values corresponding to the various indoor units, being started up and operated, in the air conditionerin real time; judging whether an entire entrance condition of a refrigerant flow adjustment process is met when the air conditioner is carried out; using the electronic expansion valves correspondingto the indoor units which meet the entrance condition as to-be-adjusted electronic expansion valves if the entire entrance condition of the refrigerant flow adjustment process is met when the air conditioner is carried out, controlling the entrance of the indoor units into the refrigerant flow adjustment process, and adjusting the openness of the to-be-adjusted electronic expansion valves to ensure that refrigerant flow of the to-be-adjusted electronic expansion valves meets a requirement on cooling ability or heating ability of the indoor units; and continuously carrying out air conditioner and judging whether the entire entrance condition of the refrigerant flow adjustment process is met if the entire entrance condition of the refrigerant flow adjustment process is not met when the air conditioner is carried out. According to the method disclosed by the invention, the refrigerant flow of the various indoor units can meet the requirements on the cooling ability or the heating ability.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method and device for controlling an electronic expansion valve of an air conditioner, a computer product and an air conditioner. Background technique [0002] In a one-to-many or multi-connected air-conditioning system (that is, an air-conditioning system in which one outdoor unit drives multiple indoor units), electronic expansion valves are usually used to throttle the refrigerant in the air-conditioning system. The air conditioning system controls the opening or closing of the electronic expansion valve according to whether the indoor unit is turned on, and controls or corrects the opening of the electronic expansion valve according to parameters such as superheating degree, subcooling degree and exhaust temperature. [0003] The above control method for the electronic expansion valve can maintain the normal operation of the air conditioning system when the design ...

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Problems solved by technology

[0003] The above control method for the electronic expansion valve can maintain the normal operation of the air conditioning system when the design parameters of each indoor unit are the same and the installation environment is similar, but when the design parameters of each indoor unit are different or the installation environment is greatly different In this case, it is easy to cause deviations in the opening control of the electronic expansion valves corresponding to different indoor units, resulting in the inability to meet the cooling or heating needs of the indoor units according to the designed heat transfer of each indoor unit. When the electronic expansion valves corresponding to some indoor units When the refrigerant flow rate of the indoor unit is too much, the refrigerant flow rate in the electronic expansion valve corresponding to another part of the indoor unit will be too small.

Running in this state for a long time, the reliability of the air conditioning system cannot be guaranteed. At the same time, it is easy to cause large deviations in the cooling or heating effects of different indoor units, and the cooling or heating effects of some indoor units exceed expectations. , some indoor units have poor cooling or heating effects, seriously affecting the user experience of using the air conditioner

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