CN-121993866-A - Control method, control device, air conditioner and storage medium

CN121993866ACN 121993866 ACN121993866 ACN 121993866ACN-121993866-A

Abstract

The invention discloses a control method, a control device, an air conditioner and a storage medium. The air conditioner comprises a compressor, a four-way valve, an outdoor heat exchanger, a control valve, an indoor heat exchanger and an indoor fan, wherein the four-way valve is communicated with the compressor, the indoor heat exchanger and the outdoor heat exchanger, the control valve is arranged at the refrigerant upstream of the indoor heat exchanger, the control method comprises the steps of controlling the indoor fan to operate and the control valve to be conducted under the condition that the air conditioner is started, controlling the indoor fan to operate for a first preset time period according to a shutdown instruction, and then closing the control valve. According to the control method of the air conditioner, the refrigerant leaked from the indoor can not gather under the action of the indoor fan, the combustible risk of the refrigerant is reduced to a certain extent, the refrigerant amount leaked from the indoor side can be reduced to a certain extent, and therefore the combustible risk of the refrigerant is reduced.

Inventors

MO YIYANG
JIN WENRUI
LUO HONGJIE
PAN ZHONGYU
HE YANLIN
WU KONGXIANG

Assignees

广东美的暖通设备有限公司
美的集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (13)

1. The control method of the air conditioner is characterized in that the air conditioner comprises a compressor, a four-way valve, an outdoor heat exchanger, a control valve, an indoor heat exchanger and an indoor fan, wherein the four-way valve is communicated with the compressor, the indoor heat exchanger and the outdoor heat exchanger, and the control valve is arranged at the refrigerant upstream of the indoor heat exchanger; The control method comprises the following steps: When the air conditioner is started, controlling the indoor fan to operate and the control valve to be conducted; And according to a shutdown instruction, controlling the indoor fan to be closed after running for a first preset time period, and controlling the control valve to be disconnected.
2. The control method according to claim 1, wherein the control valve is provided between the indoor heat exchanger and the outdoor heat exchanger, the control valve being provided upstream of a refrigerant of the indoor heat exchanger in a case where the air conditioner is in a cooling mode; according to a shutdown instruction, controlling the indoor fan to be closed after running for a first preset time period, and controlling the control valve to be disconnected comprises the following steps: when the shutdown instruction is received and the current mode of the air conditioner is a heating mode, the air conditioner is controlled to be switched into a refrigerating mode, then the indoor fan is controlled to be closed after running for a first preset time period, and the control valve is controlled to be disconnected.
3. The control method according to claim 1, wherein the control valve is provided between the indoor heat exchanger and the four-way valve, the control valve being provided upstream of a refrigerant of the indoor heat exchanger in a case where the air conditioner is in a heating mode; according to a shutdown instruction, controlling the indoor fan to be closed after running for a first preset time period, and controlling the control valve to be disconnected comprises the following steps: When a shutdown instruction is received, when the current mode of the air conditioner is a refrigeration mode, the air conditioner is controlled to be switched to a heating mode, then the indoor fan is controlled to be closed after running for a first preset time period, and the control valve is controlled to be disconnected.
4. The control method according to claim 1, wherein the off time of the control valve is not later than the off time of the indoor fan.
5. The control method according to claim 1, wherein the air conditioner includes a check valve connected to the compressor, the check valve being configured to prevent a refrigerant from flowing back to the compressor or the four-way valve.
6. The control method according to claim 5, wherein the first preset time period is longer than or equal to a pressure balance minimum time period.
7. The control method according to claim 5, wherein controlling the indoor fan to be turned off after a first preset time period is performed according to a shutdown command, and controlling the control valve to be turned off comprises: And controlling the control valve to be disconnected after keeping on for a second preset time period according to a shutdown instruction, wherein the second preset time period is longer than or equal to the shortest pressure balance time and shorter than or equal to the safe time period, and the safe time period is determined according to the maximum allowable indoor leakage amount, the total refrigerant amount, the maximum time for complete refrigerant leakage, the refrigerant leakage acceleration coefficient, the content between the control valve and the one-way valve and the internal volume of the air conditioner.
8. The control method according to claim 7, characterized in that the second preset time period is greater than or equal to 0 seconds and less than or equal to 120 seconds, and/or the first preset time period is greater than or equal to 0 seconds and less than or equal to 120 seconds.
9. The control method according to claim 1, wherein the control valve is provided on a side close to the indoor heat exchanger.
10. The control method according to claim 1, wherein the air conditioner includes a low pressure tank connecting the four-way valve and the compressor.
11. A control apparatus, characterized by comprising: A processor, and; A memory storing a computer program which, when executed by the processor, implements the steps of the control method of any one of claims 1-10.
12. An air conditioner comprising the control device according to claim 11.
13. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the control method according to any one of claims 1-10.

Description

Control method, control device, air conditioner and storage medium Technical Field The present invention relates to the field of air conditioning technologies, and in particular, to a control method, a control device, an air conditioner, and a computer storage medium. Background In the related art, an air conditioner is provided with a combustible refrigerant. When the air conditioner is used for a long time, refrigerant may leak at the indoor side. When the air conditioner is in operation, leaked refrigerant can be blown away through the indoor fan, so that the refrigerant is prevented from accumulating to exceed the combustible concentration. However, when the air conditioner is in a standby state, the indoor fan is turned off, and the leaked refrigerant may accumulate and exceed the flammable concentration. Disclosure of Invention The embodiment of the invention provides a control method, a control device, an air conditioner and a computer storage medium to solve at least one technical problem. The embodiment of the invention provides a control method of an air conditioner. The air conditioner comprises a compressor, a four-way valve, an outdoor heat exchanger, a control valve, an indoor heat exchanger and an indoor fan, wherein the four-way valve is communicated with the compressor, the indoor heat exchanger and the outdoor heat exchanger, and the control valve is arranged at the refrigerant upstream of the indoor heat exchanger; The control method comprises the following steps: When the air conditioner is started, controlling the indoor fan to operate and the control valve to be conducted; And according to a shutdown instruction, controlling the indoor fan to be closed after running for a first preset time period, and controlling the control valve to be disconnected. In the above embodiment, when the air conditioner is started or the first preset duration of the shutdown instruction is received, the indoor fan is controlled to operate, so that the refrigerant leaked from the indoor can not gather under the action of the indoor fan, the refrigerant combustible risk is reduced to a certain extent, and after the air conditioner receives the shutdown instruction, the control valve is controlled to be disconnected, the refrigerant amount leaked from the indoor side can be reduced to a certain extent, and the refrigerant combustible risk is reduced. In some embodiments, the control valve is disposed between the indoor heat exchanger and the outdoor heat exchanger, the control valve being disposed upstream of a refrigerant of the indoor heat exchanger when the air conditioner is in a cooling mode; according to a shutdown instruction, controlling the indoor fan to be closed after running for a first preset time period, and controlling the control valve to be disconnected comprises the following steps: when the shutdown instruction is received and the current mode of the air conditioner is a heating mode, the air conditioner is controlled to be switched into a refrigerating mode, then the indoor fan is controlled to be closed after running for a first preset time period, and the control valve is controlled to be disconnected. In some embodiments, the control valve is disposed between the indoor heat exchanger and the four-way valve, the control valve being disposed upstream of the refrigerant of the indoor heat exchanger when the air conditioner is in a heating mode; according to a shutdown instruction, controlling the indoor fan to be closed after running for a first preset time period, and controlling the control valve to be disconnected comprises the following steps: When a shutdown instruction is received, when the current mode of the air conditioner is a refrigeration mode, the air conditioner is controlled to be switched to a heating mode, then the indoor fan is controlled to be closed after running for a first preset time period, and the control valve is controlled to be disconnected. In some embodiments, the off time of the control valve is no later than the off time of the indoor fan. In some embodiments, the air conditioner includes a check valve coupled to the compressor, the check valve configured to prevent backflow of refrigerant to the compressor or the four-way valve. In certain embodiments, the first predetermined time period is greater than or equal to a minimum time period for pressure equalization. In some embodiments, according to a shutdown instruction, controlling the indoor fan to be turned off after a first preset period of time, and controlling the control valve to be turned off includes: And controlling the control valve to be disconnected after keeping on for a second preset time period according to a shutdown instruction, wherein the second preset time period is longer than or equal to the shortest pressure balance time and shorter than or equal to the safe time period, and the safe time period is determined according to the maximum allowable indoor leakage amount, the total refrige