CN-121977281-A - Air conditioner shutdown control method, electronic equipment and air conditioner

CN121977281ACN 121977281 ACN121977281 ACN 121977281ACN-121977281-A

Abstract

The embodiment of the disclosure provides a shutdown control method of an air conditioner, electronic equipment and the air conditioner. The method comprises the steps of responding to a shutdown request, determining a system energy index at the first moment according to the temperature of an outdoor heat exchanger at the first moment, the operating frequency of a compressor at the first moment and the opening degree of an expansion valve at the first moment, wherein the first moment is the moment when the shutdown request is received, determining the current operating frequency of the compressor according to the system energy index at the first moment and the current time, responding to the fact that the current operating frequency of the compressor is larger than a preset threshold frequency, returning to the step of determining the current operating frequency of the compressor based on the increase of the current time, executing, reducing the current operating frequency of the compressor along with the increase of the current time, and responding to the fact that the current operating frequency is smaller than the preset threshold frequency, and controlling the air conditioner to shutdown. The present disclosure reduces the instantaneous pressure differential created by the high and low pressure sides, reducing the risk of pressure shock and hydraulic shock.

Inventors

PAN ZIHAO
LIN ZHICHENG
Long Danni
CAO RUI
ZHANG LIN
WU YUCHANG

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260505
Application Date: 20251226

Claims (12)

1. A stop control method of an air conditioner, comprising: In response to receiving a shutdown request, determining a system energy index of the air conditioner at a first moment according to the temperature of the outdoor heat exchanger at the first moment, the running frequency of the compressor at the first moment and the opening degree of the expansion valve at the first moment, wherein the first moment is the moment when the shutdown request is received; determining the current running frequency of the compressor according to the system energy index at the first moment and the current time corresponding to the current moment, wherein the current moment is positioned after the first moment, and the current time is from the first moment to the current moment; responding to the fact that the current running frequency of the compressor is larger than a preset threshold frequency, returning to the step of determining the current running frequency of the compressor according to the system energy index and the current time corresponding to the current time based on the increase of the current time, wherein the current running frequency of the compressor is reduced along with the increase of the current time; and controlling the air conditioner to stop in response to the current running frequency of the compressor is smaller than the preset threshold frequency.
2. The method of claim 1, wherein determining the current operating frequency of the compressor based on the system energy index and a current time period corresponding to the current time instant comprises: Determining a frequency of a frequency-reducing inflection point of the compressor according to the system energy index at the first moment, wherein the frequency-reducing rate of the compressor before the frequency-reducing inflection point is smaller than the frequency-reducing rate of the compressor after the frequency-reducing inflection point; and determining the current running frequency of the compressor according to the frequency of the down-conversion inflection point and the current duration.
3. The method of claim 2, wherein said determining a current operating frequency of the compressor based on the downshifting corner frequency and the current time period comprises: In case the operating frequency of the compressor is greater than the frequency of the down-converting inflection point, determining a current operating frequency of the compressor according to the operating frequency of the compressor at a first time and the current time period, and/or, And under the condition that the operation frequency of the compressor is smaller than or equal to the frequency of the frequency-reducing inflection point, determining the current operation frequency of the compressor according to the frequency-reducing inflection point, a first preset duration and the current duration, wherein the first preset duration is the duration consumed by the compressor from the operation frequency at the first moment to the frequency-reducing inflection point.
4. The method of claim 1, wherein after receiving the shutdown request and before controlling the air conditioner to shutdown, the method further comprises: determining a target opening of the expansion valve according to the opening of the expansion valve at the first moment and a system energy index at the first moment, wherein the target opening is larger than the opening at the first moment; and controlling the expansion valve to gradually increase from the opening at the first moment to the target opening.
5. The method of claim 4, wherein the controlling the expansion valve to gradually increase from the opening at the first time to the target opening comprises: And controlling the expansion valve to be increased to the target opening from the opening at the first moment in a stepping manner within a second preset time, wherein the range of the second preset time is 2-5 seconds.
6. The method of any of claims 1-5, wherein after receiving the shutdown request and before controlling the air conditioner to shutdown, the method further comprises: And according to the working mode of the air conditioner, the working parameters of the outdoor fan and the indoor fan are cooperatively controlled, wherein the working parameters comprise at least one of the rotating speed and the steering of the fan.
7. The method of claim 6, wherein the operation mode is a cooling mode, and the cooperatively controlling the operation parameters of the outdoor fan and the indoor fan according to the operation mode of the air conditioner comprises: Determining the current running rotating speed of the outdoor fan according to the current running frequency of the compressor and the frequency of the down-conversion inflection point matched with the system energy index, and/or, And responding to the current temperature of the indoor heat exchanger to meet a first preset condition, controlling the indoor fan to reversely rotate so that air flow enters from an air outlet of the indoor unit and is discharged from an air inlet of the indoor unit, wherein the first preset condition comprises that the current temperature of the indoor heat exchanger is greater than a first preset temperature, or the first preset condition comprises that the current temperature of the indoor heat exchanger is less than a second preset temperature, and the second preset temperature is less than the first preset temperature.
8. The method of claim 7, wherein said determining the current operating speed of the outdoor fan based on the current operating frequency of the compressor and the system energy index-matched frequency of the downconversion inflection point comprises: controlling the outdoor fan to operate at a first rotational speed in case that the current operating frequency of the compressor is greater than the sum of the down-conversion inflection frequency and a preset frequency constant, and/or, Controlling the outdoor fan to operate at a second rotational speed, which is smaller than the first rotational speed, when the current operating frequency of the compressor is greater than or equal to the difference between the down-conversion inflection point frequency and the preset frequency constant and is smaller than or equal to the sum of the down-conversion inflection point frequency and the preset frequency constant; and/or the number of the groups of groups, And controlling the outdoor fan to operate at a third rotating speed, wherein the third rotating speed is smaller than the second rotating speed under the condition that the current operating frequency of the compressor is smaller than the difference between the frequency of the down-conversion inflection point and the preset frequency constant.
9. The method of claim 6, wherein the operation mode is a heating mode, and the cooperatively controlling the operation parameters of the outdoor fan and the indoor fan according to the operation mode of the air conditioner comprises: after receiving the shutdown request, controlling the outdoor fan to stop running or controlling the outdoor fan to run at a fourth rotating speed, wherein the fourth rotating speed is less than 15% of the maximum rotating speed of the outdoor fan, and/or, And determining the rotation direction of the indoor fan according to the indoor temperature and the current temperature of the outdoor heat exchanger.
10. The method of claim 9, wherein determining the direction of rotation of the indoor fan based on the indoor temperature and the current temperature of the outdoor evaporator comprises: Controlling the indoor fan to rotate forward under the condition that the current temperature of the outdoor heat exchanger is greater than the sum of the indoor temperature and a preset temperature constant, so that air flow enters from an air inlet of the indoor unit and is discharged from an air outlet of the indoor unit, and/or, And controlling the indoor fan to reversely rotate under the condition that the current temperature of the outdoor heat exchanger is smaller than or equal to the sum of the indoor temperature and a preset temperature constant, so that air flow enters from an air outlet of the indoor unit and is discharged from an air inlet of the indoor unit.
11. An electronic device, comprising: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-10.
12. An air conditioner comprising the electronic device of claim 11 or comprising a controller for performing the method of any one of claims 1-10.

Description

Air conditioner shutdown control method, electronic equipment and air conditioner Technical Field The disclosure relates to the technical field of air conditioners, and in particular relates to a shutdown control method of an air conditioner, electronic equipment and the air conditioner. Background In the prior art, the air conditioner accumulates a large amount of refrigerant inside the air conditioner (e.g., compressor, piping, heat exchanger) and is in a high-pressure, high-temperature and high-energy state during normal operation, particularly during high-load operation. The compressor and fan are typically powered down immediately upon receipt of a shutdown signal or command, which causes a series of problems. Disclosure of Invention The embodiment of the disclosure provides a shutdown control method of an air conditioner, electronic equipment and the air conditioner, which are used for solving or relieving one or more technical problems in the prior art. As a first aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide a shutdown control method of an air conditioner, including: in response to receiving a shutdown request, determining a system energy index of the air conditioner at a first moment according to the temperature of the outdoor heat exchanger at the first moment, the running frequency of the compressor at the first moment and the opening degree of the expansion valve at the first moment, wherein the first moment is the moment when the shutdown request is received; Determining the current running frequency of the compressor according to the system energy index at the first moment and the current time corresponding to the current moment, wherein the current moment is positioned after the first moment, and the current time is from the first moment to the current moment; Responding to the fact that the current running frequency of the compressor is larger than a preset threshold frequency, returning to the step of determining the current running frequency of the compressor according to the system energy index and the current time corresponding to the current time based on the increase of the current time, and reducing the current running frequency of the compressor along with the increase of the current time; And controlling the air conditioner to stop in response to the current operating frequency of the compressor being less than a preset threshold frequency. In some embodiments, determining the current operating frequency of the compressor according to the system energy index and the current time corresponding to the current time comprises: Determining a frequency of a frequency-reducing inflection point of the compressor according to the system energy index at the first moment, wherein the frequency-reducing rate of the compressor before the frequency-reducing inflection point is smaller than the frequency-reducing rate of the compressor after the frequency-reducing inflection point; and determining the current running frequency of the compressor according to the frequency of the down-conversion inflection point and the current duration. In some embodiments, determining the current operating frequency of the compressor based on the down-comer frequency and the current duration includes: in case the operating frequency of the compressor is greater than the frequency of the downshifting inflection point, determining a current operating frequency of the compressor according to the operating frequency of the compressor at the first time and the current time period, and/or, And under the condition that the operation frequency of the compressor is smaller than or equal to the down-conversion inflection point frequency, determining the current operation frequency of the compressor according to the down-conversion inflection point frequency, a first preset duration and the current duration, wherein the first preset duration is the duration for the compressor to reduce from the operation frequency at the first moment to the down-conversion inflection point frequency consumption. In some embodiments, after receiving the shutdown request, and before controlling the air conditioner to shutdown, the method further comprises: determining a target opening of the expansion valve according to the opening of the expansion valve at the first moment and a system energy index at the first moment, wherein the target opening is larger than the opening at the first moment; the expansion valve is controlled to gradually increase from the opening at the first time to the target opening. In some embodiments, controlling the expansion valve to gradually increase from the opening at the first time to the target opening includes: the expansion valve is controlled to be increased to the target opening from the opening at the first moment in a stepping mode within a second preset time, and the range of the second preset time is 2-5 seconds. In some embodiments, after receivi