Control device and control method for air conditioning refrigerant lacking protection and air conditioning system

Abstract

The invention provides a control device and a control method for air conditioning refrigerant lacking protection and an air conditioning system. The control device for the air conditioning refrigerant lacking protection comprises a detecting unit, a judging unit and an executing unit, wherein the detecting unit is used for detecting the indoor environment temperature Tinner ring, the indoor air outlet temperature Tinner air outlet and time; the judging unit is used for judging the relationship between |Tinner ring - Tinner air outlet| and Tpreset in continuous first preset time t1; and the executing unit is used for executing an action of refrigerant lacking protection or not according to the judging result of the judging unit. Whether refrigerant lacks or not can be judged when all relationships are met in the continuous first preset time t1, so that whether an air conditioning lacks the refrigerant or not and whether the air conditioning needs to the enter refrigerant lacking protection or not can be accurately judged in time, the situation that wrong protection occurs due to refrigerant lacking of the air conditioning system is avoided, and compressor can be effectively protected in time under the condition that the air conditioning lacks the refrigerant and particularly lacks fluorine.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a control device, a control method and an air conditioning system for protecting an air conditioner from lack of refrigerant. Background technique [0002] When the air conditioner in the prior art lacks fluorine, the temperature of the compressor winding will be very high, which will cause great damage to the compressor. The low-voltage protection and the built-in protection of the compressor are not enough to protect the compressor. It is imperative. At present, there are many methods and devices for protecting air conditioners against fluorine deficiency. Each protection method includes a core evaluation parameter, such as inner pipe temperature, power, current, exhaust temperature, flow rate, etc. These methods are very simple and easy. Yes, it can play a good role in protecting the compressor. The patent No. CN104061656A is to design the method and devi...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low accuracy of the lack of refrigerant protection control of the air conditioning system in the prior art, thereby providing a control device, a control method and an air conditioning system for the lack of refrigerant protection of the air conditioner

Images