Air conditioner with electronic expansion valve and control method thereof

Abstract

The invention discloses an air conditioner with an electronic expansion valve and a control method thereof and belongs to the field of air conditioners. When the air conditioner is temporarily shut down, the air conditioner is started again through pressure maintaining, quick starting can be achieved, and energy is effectively saved. The air conditioner with the electronic expansion valve is characterized in that the air conditioner comprises a circulation system of which a circulation circuit is provided with the electronic expansion valve in a communicating mode, and a control device for controlling the electronic expansion valve to open and close, wherein the control device comprises a duration estimation module and a pressure maintaining start module; the duration estimation module isused for measuring first duration from stop to next start of the air conditioner and comparing the first duration with preset stop reference duration, if the first duration is shorter than or equal tothe reference duration, a pressure maintaining start signal is output, and if the first duration is longer than the reference duration, a normal start signal is output; and the pressure maintaining start module is used for controlling the electronic expansion valve to open after being delayed for certain duration when receiving the pressure maintaining start signal output by the duration estimation module.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an air conditioner with an electronic expansion valve and a control method thereof. Background technique [0002] When the air conditioner is running, there will be normal operation shutdown and abnormal operation shutdown. For normal shutdown, especially for fixed frequency air conditioners, when the set temperature is reached, the compressor will stop, and the previously established high and low pressure differences will gradually disappear. . When starting up again, it is necessary to establish a new pressure balance. This process must consume a certain amount of energy. If the pressure difference between the high and low pressure before the shutdown can be well maintained and maintained until the time when the air conditioner is restarted, it will inevitably save a certain amount of energy. energy of. For abnormal shutdowns, such as sudden power failure, tripping, overload, ...

AI Technical Summary

Problems solved by technology

[0005] However, the control of these two methods is flawed, because after a certain time limit, the temperature of the circulation system of the air conditioner will eventually approach the temperature of the environment. and poorly

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