Control method and control device for air conditioning system

Abstract

The invention discloses a control method for an air conditioner system. The control method includes the following steps that when the air conditioner system gets into a defrosting mode, the outlet temperature of an outdoor heat exchanger is detected; when the air conditioner system meets the condition for quitting the defrosting mode, the outlet temperature of the outdoor heat exchanger is judged; if the outlet temperature of the outdoor heat exchanger is higher than a preset temperature, the air conditioner system is directly controlled to get into a heating mode; and if the outlet temperature of the outdoor heat exchanger is smaller than or equal to the preset temperature, the opening degree of a throttling component is increased through adjustment so that the outlet temperature of the outdoor heat exchanger can be higher than the preset temperature, time starts to be kept when the outlet temperature of the outdoor heat exchanger is larger than the preset temperature, and the air conditioner system is controlled to get into the heating model until the kept time is longer than preset time. By means of the control method of the air conditioner system, the problem of abnormal operation of the air conditioner system caused when the throttling component is blocked by lubricating oil in the heating process of the air conditioner system is solved, and normal heating of the air conditioner system is guaranteed. The invention further discloses a control device for the air conditioner system.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a control method of an air conditioning system and a control device of the air conditioning system. Background technique [0002] At present, the destruction of the ozone layer and global warming have become increasingly serious global environmental problems, and the refrigerants R22 and R410A commonly used in the refrigeration industry will have an impact on the environment. [0003] Due to the excellent environmental friendliness of hydrocarbon refrigerants HCs, that is, low GWP (Global Warming Potential, global warming potential value) and ODP (Ozone Depletion Potential, ozone depletion potential value) is 0, more and more applications in refrigeration in the industry. With the use of HCs refrigerants in compressors, there are still many problems that need to be solved. For example, under low-temperature heating conditions, it is easy for lubricating oil to block the...

AI Technical Summary

Problems solved by technology

Among them, the oil-gas refrigerant mixture cannot flow when it is lower than the pour point of the oil-gas refrigerant mixture, and can only flow when it is higher than the oil-gas refrigerant mixture. Therefore, the oil-gas refrigerant mixture is below the pour point of the oil-gas refrigerant mixture. , if the temperature of the throttling part is lower than -25°C for a long time, that is, lower than the pour point of the oil-gas refrigerant mixture, the oil-gas refrigerant mixture here will not flow and will be blocked in the throttling part

Images