CN-121993867-A - Control method, control device, air conditioner and storage medium

CN121993867ACN 121993867 ACN121993867 ACN 121993867ACN-121993867-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 connected with the compressor, the indoor heat exchanger and the outdoor heat exchanger, the control valve is positioned at the upstream of a refrigerant of the indoor heat exchanger, the control method comprises the steps of controlling the operation of the indoor fan and the compressor and the control valve to be conducted under the condition that the air conditioner is started, controlling the compressor to be closed after the operation of the compressor is controlled to be carried out for a first preset time according to a shutdown instruction, and controlling the control valve to be disconnected so as to reduce the refrigerant quantity at the indoor side. In the control method of the air conditioner, the amount of the refrigerant in the indoor side can be reduced to a certain extent by the running compressor, and the amount of the refrigerant in the indoor side can be increased by preventing or blocking the refrigerant from flowing to the indoor side to a certain extent by the control valve.

Inventors

MO YIYANG
JIN WENRUI
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 (14)

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 connected with the compressor, the indoor heat exchanger and the outdoor heat exchanger, and the control valve is positioned 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 and the compressor to operate and the control valve to be conducted; and according to a shutdown instruction, controlling the compressor to be closed after running for a first preset time period, and controlling the control valve to be disconnected so as to reduce the refrigerant quantity at the indoor side.
2. The control method according to claim 1, wherein controlling the compressor to be turned off after running for a first preset period of time according to a shutdown instruction, and controlling the control valve to be turned off to reduce the amount of refrigerant inside the chamber comprises: According to a shutdown instruction, the control valve is controlled to be kept on for a second preset time period and then disconnected, or; And controlling the control valve to be disconnected immediately according to a shutdown instruction.
3. The control method according to claim 2, wherein controlling the control valve to be turned on for a second preset period of time and turned off according to a shutdown instruction comprises: and according to a shutdown instruction, controlling the opening of the control valve to be reduced and kept on for a second preset time period, and then switching off.
4. The control method according to claim 1, wherein the first preset time period is related to a suction pressure, a discharge temperature, and/or a duration of operation of the compressor after receiving the shutdown command.
5. The control method according to claim 1, wherein the control valve is located between the indoor heat exchanger and the outdoor heat exchanger, the control valve being located 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 compressor to be closed after running for a first preset time period, and controlling the control valve to be disconnected so as to reduce the refrigerant amount inside the room comprises: 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 compressor is controlled to be closed after running for a first preset time period, and the control valve is controlled to be disconnected to reduce the refrigerant quantity at the indoor side.
6. The control method according to claim 1, wherein the control valve is located between the indoor heat exchanger and the four-way valve, the control valve being located 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 compressor to be closed after running for a first preset time period, and controlling the control valve to be disconnected so as to reduce the refrigerant amount inside the room comprises: 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 compressor is controlled to be closed after running for a first preset time period, and the control valve is controlled to be disconnected in time so as to reduce the refrigerant quantity at the indoor side.
7. The control method according to claim 1, wherein the off-time of the control valve is not later than the off-time of the compressor, or the off-time of the control valve is later than the off-time of the compressor.
8. 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.
9. A control method according to claim 1, characterized in that the control valve is located on the 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. The control method according to claim 1, wherein, in the case where the off time of the control valve is later than the off time of the compressor, a difference between the second preset time period and the first preset time period is less than or equal to a safety time period, which is determined based on an allowable maximum leakage amount in the room, a total refrigerant amount, a refrigerant full leakage maximum time, a refrigerant leakage acceleration coefficient, a content between the control valve and the check valve, and an internal volume of the air conditioner.
12. 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 1-11.
13. An air conditioner comprising the control device of claim 12.
14. 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 1-11.

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 refrigerant of the indoor side 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 connected with the compressor, the indoor heat exchanger and the outdoor heat exchanger, and the control valve is positioned 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 and the compressor to operate and the control valve to be conducted; and according to a shutdown instruction, controlling the compressor to be closed after running for a first preset time period, and controlling the control valve to be disconnected so as to reduce the refrigerant quantity at the indoor side. According to the control method of the air conditioner, when the air conditioner is started, the indoor fan and the compressor are controlled to operate and the control valve is controlled to be conducted, so that 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, after a shutdown instruction is received, the compressor is controlled to operate for a first preset time period according to the shutdown instruction, and then the control valve is controlled to be disconnected, the refrigerant quantity of the indoor side can be reduced to a certain extent through the operating compressor, and meanwhile, the refrigerant flowing to the indoor side is prevented or hindered to a certain extent through the control valve, so that the refrigerant quantity of the indoor side is increased. In some embodiments, controlling the compressor to be turned off after running for a first preset period of time according to a shutdown command, and controlling the control valve to be turned off to reduce the amount of refrigerant inside the chamber includes: According to a shutdown instruction, the control valve is controlled to be kept on for a second preset time period and then disconnected, or; And controlling the control valve to be disconnected immediately according to a shutdown instruction. In some embodiments, according to a shutdown instruction, controlling the control valve to be turned on for a second preset period of time and then turned off includes: and according to a shutdown instruction, controlling the opening of the control valve to be reduced and kept on for a second preset time period, and then switching off. In certain embodiments, the first preset time period is related to a suction pressure, a discharge temperature, and/or a duration of operation of the compressor after receiving the shutdown command. In certain embodiments, the control valve is located between the indoor heat exchanger and the outdoor heat exchanger, the control valve being located upstream of the refrigerant of the indoor heat exchanger with the air conditioner in a cooling mode; according to a shutdown instruction, controlling the compressor to be closed after running for a first preset time period, and controlling the control valve to be disconnected so as to reduce the refrigerant amount inside the room comprises: 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 compressor is controlled to be closed after running for a first preset time period, and the control valve is controlled to be disconnected to reduce the refrigerant quantity at the indoor side. In certain embodiments, the control valve is located between the indoor heat exchanger and the four-way valve, the control valve being located upstream of the refrigerant of the indoor heat exchanger with the air conditioner in a heating mode; according to a shutdown instruction, controlling the compressor to be closed after