CN-121993874-A - Operation control method and device for air conditioner and readable storage medium

Abstract

The invention discloses an operation control method, an operation control device, an air conditioner and a computer readable storage medium of the air conditioner, wherein the air conditioner comprises a compressor, a four-way valve connected with the compressor, an indoor heat exchanger and an outdoor heat exchanger connected with the four-way valve; the method comprises the steps of obtaining indoor environment temperature and indoor heat exchanger temperature, determining switching delay time according to first delay time, indoor environment temperature and indoor heat exchanger temperature, and controlling the four-way valve to switch on state when the time counted from stopping operation of the compressor reaches the switching delay time. The time for switching the on state of the four-way valve is more consistent with the current running condition of the air conditioner, the overlong switching delay time of the four-way valve is avoided, the risk that the refrigerant is impacted due to the excessively short switching delay time of the four-way valve is avoided, and the user experience and the safety are improved.

Inventors

• CHEN JIAQIANG
• XIE LIGAO

Assignees

• 广东美的制冷设备有限公司

Dates

Publication Date

20260508

Application Date

20241105

Claims (13)

1. 1. An operation control method of an air conditioner, wherein the air conditioner includes a compressor, a four-way valve connected to the compressor, an indoor heat exchanger connected to the four-way valve, and an outdoor heat exchanger, the method comprising: When a mode switching signal is acquired, controlling the compressor to stop running for a first delay time period and restarting the compressor, wherein the mode switching signal is used for indicating switching between a heating running state and a refrigerating running state; acquiring indoor environment temperature and indoor heat exchanger temperature, and determining switching delay time according to the first delay time, the indoor environment temperature and the indoor heat exchanger temperature, wherein the switching delay time is longer than or equal to the first delay time; And controlling the four-way valve to switch on state when the time length counted from the stop operation start of the compressor reaches the switching delay time length.
2. 2. The operation control method according to claim 1, characterized in that when an absolute value of a difference between the indoor heat exchanger temperature and the indoor ambient temperature is less than or equal to the first preset value, a current first delay period is taken as the switching delay period.
3. 3. The operation control method according to claim 2, wherein when an absolute value of a difference between the indoor heat exchanger temperature and the indoor ambient temperature is greater than a first preset value, the first delay period is added with a preset interval period to obtain a new first delay period, the indoor heat exchanger temperature and the indoor ambient temperature are re-acquired after the preset interval period is reached, and whether the absolute value of the difference between the indoor heat exchanger temperature and the indoor ambient temperature is greater than the first preset value is re-determined.
4. 4. The operation control method according to claim 1, wherein the mode switching signal includes a defrosting trigger signal, and the first delay period is calculated according to a preset defrosting reference period and an indoor environment temperature and an indoor heat exchanger temperature when the defrosting trigger signal is acquired.
5. 5. The operation control method according to claim 4, wherein the first delay period is calculated using the following formula: Wherein T1 is a first delay time, T1 is an indoor environment temperature when the defrosting trigger signal is acquired, T2 is an indoor heat exchanger temperature when the defrosting trigger signal is acquired, H is a preset defrosting reference time, and a and b are preset coefficients.
6. 6. The operation control method according to claim 4, wherein the air conditioner further comprises an external fan for generating an air flow for heat exchange with the outdoor heat exchanger, and the four-way valve is controlled to stop operation while switching on the four-way valve.
7. 7. The operation control method according to claim 4, wherein the defrosting trigger signal is generated when the air conditioner is in a heating operation state and a sum of an outdoor heat exchanger temperature and a second preset value is less than or equal to an outdoor ambient temperature.
8. 8. The operation control method according to claim 7, wherein the mode switching signal further includes a defrosting exit signal generated when the outdoor heat exchanger temperature is greater than or equal to the outdoor environment temperature.
9. 9. The operation control method according to claim 8, wherein the air conditioner further comprises an external fan for generating an air flow for heat exchange with the outdoor heat exchanger, and the external fan is controlled to start operation when the defrosting exit signal is acquired.
10. 10. The operation control method according to claim 1, wherein the mode switching signal further includes a heating switching signal and a cooling switching signal from a remote controller or a line controller.
11. 11. An operation control apparatus comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, the processor executing the program to implement the operation control method of an air conditioner according to any one of claims 1 to 10.
12. 12. An air conditioner comprising the operation control device according to claim 11.
13. 13. A computer-readable storage medium storing computer-executable instructions for causing a computer to execute the operation control method of the air conditioner according to any one of claims 1 to 10.

Description

Operation control method and device for air conditioner and readable storage medium Technical Field The present invention relates to the field of air conditioning technologies, and in particular, to an operation control method and apparatus for an air conditioner, and a computer readable storage medium. Background The four-way valve in air conditioner is an important component for controlling flow direction of refrigerant, and can make refrigerant flow between different pipelines so as to implement refrigeration function or heating function of air conditioner. Since the four-way valve has a high-pressure region and a low-pressure region of the refrigerant inside, an impact of the liquid refrigerant is generated when the four-way valve is switched to the on state. The impact of the liquid refrigerant can cause damage to the four-way valve and other associated components, and therefore measures need to be taken to prevent this from occurring. At present, most of the four-way valves are switched after the pressure of a refrigerant pipeline of a refrigeration system is balanced by adopting a delay switching mode. However, for the simplicity of control, a fixed delay time is basically adopted, so that there are more hidden hazards, for example, when the running condition of the refrigeration system is not bad, the delay time is too long, the waiting time for state switching is too long, and the user experience is poor, for example, when the running condition of the refrigeration system is bad, the delay time is insufficient, and the risk of refrigerant impact is still present. Disclosure of Invention The invention aims to at least solve one of the technical problems in the prior art, and provides an operation control method and an operation control device for an air conditioner, the air conditioner and a computer readable storage medium, which can enable the moment of switching on state of a four-way valve to be more consistent with the current operation condition of the air conditioner, and are beneficial to improving user experience and safety. In a first aspect, an embodiment of the present invention provides an operation control method of an air conditioner, the air conditioner including a compressor, a four-way valve connected to the compressor, an indoor heat exchanger connected to the four-way valve, and an outdoor heat exchanger, the method including: When a mode switching signal is acquired, controlling the compressor to stop running for a first delay time period and restarting the compressor, wherein the mode switching signal is used for indicating switching between a heating running state and a refrigerating running state; acquiring indoor environment temperature and indoor heat exchanger temperature, and determining switching delay time according to the first delay time, the indoor environment temperature and the indoor heat exchanger temperature, wherein the switching delay time is longer than or equal to the first delay time; And controlling the four-way valve to switch on state when the time length counted from the stop operation start of the compressor reaches the switching delay time length. The operation control method of the air conditioner has the advantages that after the mode switching signal is obtained, the compressor stops operating for the first delay time, so that the refrigerant in the refrigerant pipeline flows back to the low-pressure area from the high-pressure area, the high-low pressure difference of each port of the four-way valve is reduced, the risk of impact of the refrigerant when the four-way valve is switched to a conducting state is reduced, on the basis of the first delay time, the first delay time is adjusted according to the indoor environment temperature and the indoor heat exchanger temperature, the switching delay time corresponding to the switching conducting state of the four-way valve is obtained, the time of the switching conducting state of the four-way valve is more consistent with the current operation condition of the air conditioner, the influence of user experience caused by overlong switching delay time of the four-way valve is avoided, the risk of impact of the refrigerant still caused by excessively short switching delay time of the four-way valve is avoided, and the user experience and safety are improved. According to the operation control method provided by some embodiments of the present invention, when the absolute value of the difference between the indoor heat exchanger temperature and the indoor environment temperature is greater than a first preset value, the first delay time is added with a preset interval time to obtain a new first delay time, the indoor heat exchanger temperature and the indoor environment temperature are re-obtained after the timing reaches the preset interval time, and whether the absolute value of the difference between the indoor heat exchanger temperature and the indoor environment temperature is greater than the first