Control method for improving high-load operation performance of air conditioner refrigeration

Abstract

The invention discloses a control method for improving high-load operation performance of air conditioner refrigeration. The method is characterized by comprising the following steps that (a) in an air conditioner refrigeration mode, an air conditioner main control board records coil pipe temperature T1 of an indoor heat exchanger, coil pipe temperature T2 of an outdoor heat exchanger or pressureexhaust temperature T3 collected by a press exhaust temperature sensor in real time; (b) if T1 recorded by the air conditioner main control board is larger than or equal to H1, T2 recorded by the airconditioner main control board is larger than or equal to H2 or T3 recorded by the air conditioner main control board is larger than or equal to H3, and duration time is t1, the step (c) is executed;(c) the air conditioner main control board controls the current rotating speed of an inner fan to be reduced by one gear for operation; and (d) after the step (c) is executed, when T2 recorded by theair conditioner main control board again is larger than or equal to H1, T2 recorded by the air conditioner main control board again is larger than or equal to H2 or T3 recorded by the air conditionermain control board again is larger than or equal to H3, and duration time is t2, the rotating speed of the inner fan continues to be reduced by one gear for operation till being reduced to the lowestgear. The work load of a compressor can be reduced by reducing the rotating speed of the inner fan, and therefore the high load of an air conditioner system is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a control method for improving the high-load operation performance of air conditioning and refrigeration. Background technique [0002] With the continuous improvement of people's living standards, the requirements for the use of air conditioners are also increasing. The use of air conditioners in low-voltage and high-temperature environments will cause the air-conditioning system to be in a high-load operating state. In order to prevent the compressor in the air-conditioning system from being burned due to long-term high-load operation, the air-conditioning compressor will be equipped with self-protection measures. The self-protection measures will temporarily shut down the compressor and stop cooling for a period of time. In the hot summer, the air conditioner compressor is shut down many times and cannot be cooled, which will lead to poor user experience, ...

AI Technical Summary

Problems solved by technology

In the hot summer, the air conditioner compressor shuts down many times and cannot cool down, which will lead to poor user experience, and the service life of the compressor will be greatly shortened

[0003] In addition, due to environmental protection needs, the country has been vigorously promoting the use of environmentally friendly refrigerant R32, and environmentally friendly refrigerant R32 is characterized by higher working pressure and higher exhaust temperature, which is 6-10 degrees higher than that of R410A refrigerant. This further causes the air conditioner to easily enter a high-load state, and it will shut down more frequently

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