Oil returning control system and oil returning control method

Abstract

The invention discloses an oil returning control system. The oil returning control system comprises a pressure detection device arranged on an air conditioner system and a control device connected to the pressure detection device; the pressure detection device is used for detecting the pressure of the air conditioner system and sending a measured pressure value to the control device; and the control device is used for controlling the running frequency of an air conditioning unit according to the pressure of the air conditioner system. The invention further discloses an oil returning control method. The oil returning control method includes the steps that the pressure of the air conditioner system is detected in real time; and the running frequency of the air conditioning unit is controlled according to the pressure of the air conditioner system. In the oil returning control system and the oil returning control method, the running frequency can be adjusted high when the pressure is low, the flowing speed of refrigerants is increased, and therefore lubricating oil can return to a compressor easily, by means of the manner, oil returning can be accurately controlled according to the running frequency, and the oil returning reliability is improved; and meanwhile, the system pressure can also be increased while the running frequency is increased, the lubricating oil of the compressor will be within a more proper temperature range, the lubricating effect is better, and the system reliability is further improved.

Description

technical field [0001] The invention relates to the technical field of home appliances, in particular to an oil return control system and an oil return control method. Background technique [0002] The compressor is the core component of the air conditioning system. If the compressor is damaged, the air conditioning system will not work. The main cause of compressor damage is generally lack of oil, so the amount of lubricating oil in the compressor determines the reliability of the compressor. During the operation of the air conditioning system, the compressor lubricating oil will be taken out of the compressor along with the refrigerant and brought back to the compressor to lubricate the compressor. [0003] However, the lubricating oil of the compressor needs to be brought back to the compressor by the refrigerant when the flow rate of the refrigerant reaches a certain value. Therefore, when the load of the air conditioner is low and the operating frequency is low, it is ...

AI Technical Summary

Problems solved by technology

This oil return control method is logically simple, does not distinguish between operating modes, does not refer to operating load, and does not involve any other operating parameters except time; , The configuration, operating mode, and operating load of the outdoor unit are different and complicated, and the method of timing oil return can only execute the oil return command mechanized, and cannot evaluate whether the oil quantity is appropriate at a certain moment. Other interference factors make compensation and correction for the impact of oil return, which cannot intelligently respond to the demand for oil return in real time, and cannot guarantee the operation of the compressor well

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