CN-122015264-A - Air conditioner external fan control method and device and air conditioner equipment

CN122015264ACN 122015264 ACN122015264 ACN 122015264ACN-122015264-A

Abstract

The embodiment of the invention provides a control method and device for an air conditioner external fan and air conditioning equipment, and relates to the technical field of air conditioners, wherein the method comprises the steps of collecting first data, wherein the first data comprises environmental temperature data, environmental humidity data, air conditioner operation data and condenser coil temperature data; and when the frost risk exists in the condenser, adjusting the rotating speed of the external fan according to a preset control strategy. The technical scheme provided by the embodiment of the invention can solve the technical problems that the existing defrosting strategy not only can influence the heating efficiency, but also can influence the user experience due to noise sudden increase during defrosting.

Inventors

SHANG KAIFENG
SHAN LIANYU
DUAN LIANG
WANG MEI
ZHOU SHUFENG
LI SHIHAO

Assignees

小米科技(武汉)有限公司

Dates

Publication Date: 20260512
Application Date: 20260409

Claims (10)

1. An air conditioner external fan control method is characterized by comprising the following steps: Collecting first data, wherein the first data comprises environmental temperature data, environmental humidity data, air conditioner operation data and condenser coil temperature data; determining whether a frost risk exists in the condenser according to the first data; When the condenser has frosting risk, adjusting the rotating speed of the external fan according to a preset control strategy; the adjusting the rotating speed of the external fan according to a preset control strategy comprises the following steps: the method comprises the steps of adjusting the rotating speed of an external fan to be a first rotating speed every first time, monitoring the current of the external fan and/or the temperature of an external fan driving module after the external fan runs for a second time at the first rotating speed, and adjusting the rotating speed of the external fan according to the current of the external fan and/or the temperature of the external fan driving module.
2. The method of claim 1, wherein the acquiring the first data comprises: Determining whether an air conditioner meets the condition of entering a first working mode, wherein in the first working mode, the running frequency of a compressor of the air conditioner is larger than a first frequency threshold, and the first frequency threshold is the maximum running frequency of the compressor in other working modes except the first working mode; and when the condition of entering the first working mode is met, acquiring the first data.
3. The method according to claim 1 or 2, wherein the air conditioning operation data includes an air conditioning operation frequency, and the determining whether the condenser is at risk of frosting according to the first data includes: determining that the condenser is at risk of frost when the first data meets the following condition: The environment temperature data is smaller than a first temperature threshold value, wherein the first temperature threshold value comprises the frosting critical temperature of the condenser; The environmental humidity data is greater than or equal to a preset humidity threshold; The air conditioner operation frequency is greater than or equal to a preset frequency threshold value; The condenser coil temperature data is less than a second temperature threshold for a preset duration, the second temperature threshold being determined based on the ambient temperature data and the ambient humidity data.
4. The method according to claim 1, wherein said adjusting the rotational speed of the external fan according to the external fan current and/or external fan drive module temperature comprises: and when the current of the external fan is smaller than the demagnetizing protection current of the external fan and/or the temperature of the external fan driving module is smaller than the demagnetizing protection temperature of the external fan, the rotating speed of the external fan is increased according to the first adjusting amplitude every third time length.
5. The method according to claim 1, wherein said adjusting the rotational speed of the external fan according to the external fan current and/or external fan drive module temperature comprises: And when the current of the external fan is greater than or equal to the external fan demagnetizing protection current and/or the temperature of the external fan driving module is greater than or equal to the external fan demagnetizing protection temperature, reducing the rotating speed of the external fan according to the second adjusting amplitude every fourth time period until the current of the external fan is less than the external fan demagnetizing protection current and/or the temperature of the external fan driving module is less than the external fan demagnetizing protection temperature.
6. The method according to claim 4, wherein the method further comprises: And when the time length of the operation of the external fan at the rotating speed which is greater than or equal to the first rotating speed is longer than or equal to a fifth time length, the rotating speed of the external fan is recovered to a reference rotating speed, wherein the reference rotating speed is the rotating speed of the external fan before being adjusted according to the control strategy.
7. An air conditioner external fan control device, characterized by comprising: The system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring first data, and the first data comprise environmental temperature data, environmental humidity data, air conditioner operation data and condenser coil temperature data; The determining module is used for determining whether the condenser has frosting risk according to the first data; the control module is used for adjusting the rotating speed of the external fan according to a preset control strategy when the frosting risk exists in the condenser; the adjusting the rotating speed of the external fan according to a preset control strategy comprises the following steps: the method comprises the steps of adjusting the rotating speed of an external fan to be a first rotating speed every first time, monitoring the current of the external fan and/or the temperature of an external fan driving module after the external fan runs for a second time at the first rotating speed, and adjusting the rotating speed of the external fan according to the current of the external fan and/or the temperature of the external fan driving module.
8. An air conditioning device is characterized by comprising a memory and a processor; The memory stores computer-executable instructions; the processor executes computer-executable instructions stored in the memory, causing the processor to perform the air conditioner external fan control method according to any one of claims 1 to 6.
9. A computer readable storage medium, wherein computer executable instructions are stored in the computer readable storage medium, the computer executable instructions when executed by a processor are for implementing the air conditioner outdoor fan control method according to any one of claims 1-6.
10. A computer program product comprising a computer program which, when executed by a processor, implements the method of controlling an air conditioner external fan as claimed in any one of claims 1 to 6.

Description

Air conditioner external fan control method and device and air conditioner equipment Technical Field The present invention relates to the field of air conditioning technologies, and in particular, to a method and an apparatus for controlling an external fan of an air conditioner, and an air conditioning device. Background When the air conditioner is operated in a heating mode, the surfaces of the condenser fins are easy to frost. The gradual accumulation of the frost layer can obviously reduce the heat exchange efficiency of the condenser, so that the heating capacity of the air conditioner is reduced, and the indoor temperature of a user is slowly increased. In the related art, the frosting control of the air conditioner mainly depends on a periodic defrosting strategy. For example, when it is detected that the condenser coil temperature continues to fall below a set threshold, a defrost mode is initiated for a fixed period of time, forced defrost by reverse circulation or high speed operation of the external fan. However, this frosting strategy only triggers defrosting when the layer of frost is thick, which not only affects the heating efficiency, but also affects the user experience due to noise surges during defrosting. Disclosure of Invention The embodiment of the invention provides an air conditioner external fan control method and device and air conditioner equipment, which can solve the technical problems that the existing defrosting strategy can not only influence heating efficiency, but also influence user experience due to noise sudden increase during defrosting. In a first aspect, the present invention provides a method for controlling an external fan of an air conditioner, the method comprising: Collecting first data, wherein the first data comprises environmental temperature data, environmental humidity data, air conditioner operation data and condenser coil temperature data; Determining whether a frost risk exists in the condenser according to the first data; When the condenser has frosting risk, the rotating speed of the external fan is adjusted according to a preset control strategy; the adjusting the rotation speed of the external fan according to the preset control strategy includes: The method comprises the steps of adjusting the rotating speed of an external fan to be a first rotating speed every first time, monitoring the current of the external fan and/or the temperature of an external fan driving module after the external fan operates at the first rotating speed for a second time, and adjusting the rotating speed of the external fan according to the current of the external fan and/or the temperature of the external fan driving module. In one possible embodiment, the collecting the first data includes: Determining whether the air conditioner meets the condition of entering a first working mode, wherein in the first working mode, the operating frequency of a compressor of the air conditioner is larger than a first frequency threshold, and the first frequency threshold is the maximum frequency of the operation of the compressor in other working modes except the first working mode; and when the condition of entering the first working mode is met, acquiring first data. In one possible embodiment, the air-conditioning operation data includes an air-conditioning operation frequency, and determining whether the condenser has a frost risk according to the first data includes: determining that the condenser is at risk of frost when the first data meets the following condition: The environmental temperature data is smaller than a first temperature threshold value, wherein the first temperature threshold value comprises the frosting critical temperature of the condenser; the environmental humidity data is greater than or equal to a preset humidity threshold; the running frequency of the air conditioner is greater than or equal to a preset frequency threshold value; the condenser coil temperature data is less than a second temperature threshold for a preset duration, the second temperature threshold being determined based on the ambient temperature data and the ambient humidity data. In one possible embodiment, the adjusting the rotation speed of the external fan according to the external fan current and/or the external fan driving module temperature includes: And when the current of the external fan is smaller than the demagnetizing protection current of the external fan and/or the temperature of the external fan driving module is smaller than the demagnetizing protection temperature of the external fan, the rotating speed of the external fan is increased according to the first adjusting amplitude every third time length. In one possible embodiment, the adjusting the rotation speed of the external fan according to the external fan current and/or the external fan driving module temperature includes: And when the current of the external fan is greater than or equal to the external fan demagnetizi