Control method of air conditioning unit

Abstract

The invention discloses a control method of an air conditioning unit, and belongs to the field of control methods of temperature adjusting devices. The method aims to solve the problem that existing methods are low in energy efficiency. According to the control method of the air conditioning unit, when a liquid supply solenoid valve receives signals and is in an open state, or the liquid supply solenoid valve does not receive signals and a refrigerant saturated temperature value Te is larger than a set value A, the air conditioning unit is started, the frequency of a compressor is adjusted according to feedback signals, the frequency of the compressor is made to rise along with rising of indoor temperature or lower along with lowering of the indoor temperature. When the liquid supply solenoid valve receives signals and is in a closed state, or the liquid supply solenoid valve does not receive signals and the refrigerant saturated temperature value Te is smaller than or equal to a set value A, the air conditioning unit keeps the current state. The control method of an air conditioning unit can adjust the frequency of the compressor, saves more energy and electricity, is higher in energy efficiency, and achieves digitalized stepless adjustment of temperature control of air conditioners.

Description

technical field [0001] The invention relates to the field of control methods for temperature regulating devices, in particular to a control method for air conditioning units. Background technique [0002] The control method of the existing air-conditioning unit is to judge whether to start the unit by judging whether the difference between the indoor temperature and the set temperature is within the error range. [0003] Specifically, when the condensing unit sets the liquid supply solenoid valve to receive and the liquid supply solenoid valve is open, it will enter the start-up mode after the compressor has been shut down for more than 3 minutes and it is determined that the unit has no protection failure. The condensing fan is turned on, and the compressor starts to run after a delay of As. When the liquid supply solenoid valve of the condensing unit is not receiving, and the unit’s low pressure P 低 If the corresponding refrigerant saturation temperature Te>Te_aim+△T,...

AI Technical Summary

Problems solved by technology

[0004] In the existing control method, the unit frequently starts and stops after reaching the temperature point, resulting in low energy efficiency; when the unit reaches the set temperature, the compressor stops, and when the indoor temperature is higher than the set temperature, the compressor starts, and frequent switching on and off of the compressor will cause Temperature fluctuations lead to low control accuracy

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