CN-121993878-A - Method and device for predicting humidity change of heat exchanger of air conditioner

CN121993878ACN 121993878 ACN121993878 ACN 121993878ACN-121993878-A

Abstract

The invention discloses a method and a device for predicting humidity change of a heat exchanger of an air conditioner. The method comprises the steps of obtaining a first temperature difference value of indoor environment temperature and set temperature of a target room where the target room is located in a refrigerating mode of an air conditioner, controlling a compressor to stop when the first temperature difference value is smaller than or equal to a first preset temperature difference value, obtaining a first inner tube temperature, obtaining a second temperature difference value when a first change rate of temperature rise rate is smaller than or equal to the first preset change rate, obtaining accumulated stop time and a third temperature difference value when the first temperature difference value is smaller than or equal to a second preset temperature difference value and the second change rate is larger than or equal to the second preset change rate, and predicting the humidity of the heat exchanger according to the accumulated stop time and the third temperature difference value. The invention solves the technical problems that in the related art, the temperature and humidity in a room cannot be directly judged through system parameters, so that the parameters of an air conditioning system cannot be accurately controlled before and after the air conditioning compressor is stopped, and the indoor environment cannot be effectively purified.

Inventors

Li Muhu
LIN JINHUANG
WANG JINZHENG
SHI QINGQING
FENG WENKE
HE ZHENJIAN

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241104

Claims (12)

1. The method for predicting the humidity change of the heat exchanger of the air conditioner is characterized by comprising the following steps of: When the starting-up operation of the air conditioner is determined to be in a refrigerating mode, acquiring a first temperature difference value between the indoor environment temperature of a target room where the air conditioner is positioned and the set temperature of the air conditioner; When the first temperature difference value is smaller than or equal to a first preset temperature difference value, controlling a compressor of the air conditioner to stop, and obtaining a first inner tube temperature of the compressor at the stop time, wherein the first inner tube temperature is the tube temperature of an indoor heat exchanger of the air conditioner; When the first change rate of the temperature rise rate of the first inner tube temperature along with the time change is smaller than or equal to a first preset change rate, a second temperature difference value between a second inner tube temperature and the first inner tube temperature is obtained; when the second temperature difference value is smaller than or equal to a second preset temperature difference value and the second change rate of the temperature rise rate along with the time change is larger than or equal to a second preset change rate, acquiring the accumulated stop time length of the compressor at the current moment and a third temperature difference value between the inner pipe temperature and the indoor environment temperature at the current moment, wherein the first preset change rate is smaller than the second preset change rate; and predicting the humidity of the indoor heat exchanger according to the accumulated shutdown time and the third temperature difference value.
2. The method for predicting the humidity change of a heat exchanger of an air conditioner according to claim 1, wherein when it is determined that the first rate of change of the temperature rise rate of the inner tube temperature over time is less than or equal to a first preset rate of change, obtaining a second temperature difference between a second inner tube temperature and the first inner tube temperature comprises: Acquiring the temperature rise rate of the inner pipe temperature; determining the first change rate and the first preset change rate of the temperature rise rate along with time; Comparing the first change rate with the first preset change rate to obtain a first comparison result; when the first comparison result shows that the first change rate is smaller than or equal to the first preset change rate, obtaining a second inner tube temperature at the current moment; The second temperature difference between the second inner tube temperature and the first inner tube temperature is obtained.
3. The method for predicting a change in humidity of a heat exchanger of an air conditioner according to claim 1, further comprising, after obtaining a second temperature difference between a second inner tube temperature and the first inner tube temperature: When the second temperature difference value is larger than the second preset temperature difference value, determining that the air conditioner is operated in a low-humidity working condition, wherein the low-humidity working condition indicates that the condensation water quantity of an evaporator of the air conditioner is smaller than a first preset condensation water quantity; When the second temperature difference value is smaller than or equal to the second preset temperature difference value, acquiring the second inner tube temperature at the current moment; and acquiring the second change rate of the temperature rise rate of the second inner tube along with the change of time.
4. The method for predicting the humidity change of a heat exchanger of an air conditioner according to claim 1, wherein predicting the humidity of the indoor heat exchanger based on the integrated stop time period and the third temperature difference value comprises: Acquiring a preset accumulated shutdown time; Comparing the accumulated machine halt time length with the preset accumulated machine halt time length to obtain a second comparison result; When the second comparison result shows that the accumulated stop time length is longer than the preset accumulated stop time length, determining that the air conditioner is operated under a high-humidity working condition, wherein the high-humidity working condition shows that the condensation water quantity of an evaporator of the air conditioner is larger than a second preset condensation water quantity; When the second comparison result indicates that the accumulated machine-halt time length is smaller than or equal to the preset accumulated machine-halt time length, comparing the third temperature difference value with a third preset temperature difference value to obtain a third comparison result; And when the third comparison result shows that the third temperature difference value is larger than or equal to the third preset temperature difference value, determining that the air conditioner operates in a low-humidity working condition.
5. The method for predicting the change in humidity of a heat exchanger of an air conditioner according to claim 4, further comprising: when the third comparison result shows that the third temperature difference value is smaller than the third preset temperature difference value, acquiring the indoor environment temperature at the current moment; and determining the humidity working condition of the air conditioner according to the indoor environment temperature.
6. The method for predicting the humidity change of a heat exchanger of an air conditioner according to claim 5, wherein determining the humidity condition of the air conditioner according to the indoor environment temperature comprises: when the indoor environment temperature is higher than a first indoor environment temperature threshold value, determining the humidity working condition as the low-humidity working condition; And when the indoor environment temperature is lower than a second indoor environment temperature threshold value, determining the humidity working condition as the high-humidity working condition.
7. The heat exchanger humidity variation prediction method of an air conditioner according to any one of claims 1 to 6, further comprising, after predicting the humidity of the indoor heat exchanger from the accumulated stop time period and the third temperature difference value: determining the operation parameters of the air conditioner before and after the next shutdown of the compressor according to the humidity; determining a next shutdown time of the compressor; And controlling the air conditioner to operate according to the operation parameters within a preset time length before the next shutdown time and after the next shutdown time.
8. A heat exchanger humidity change prediction apparatus of an air conditioner, comprising: The first acquisition module is used for acquiring a first temperature difference value between the indoor environment temperature of a target room where the air conditioner is positioned and the set temperature of the air conditioner when the air conditioner is determined to be started and operated in a refrigerating mode; the first control module is used for controlling the compressor of the air conditioner to stop when the first temperature difference value is smaller than or equal to a first preset temperature difference value, and obtaining a first inner tube temperature of the compressor at the stop time, wherein the first inner tube temperature is the tube temperature of an indoor heat exchanger of the air conditioner; The second acquisition module is used for acquiring a second temperature difference value between the second inner tube temperature and the first inner tube temperature when the first change rate of the temperature rise rate of the first inner tube temperature along with the time change is smaller than or equal to a first preset change rate; A third obtaining module, configured to obtain, when the second temperature difference is less than or equal to a second preset temperature difference and a second rate of change of the temperature rise rate over time is greater than or equal to a second preset rate of change, an accumulated shutdown duration of the compressor at a current time and a third temperature difference between the inner tube temperature and the indoor environment temperature at the current time, where the first preset rate of change is less than the second preset rate of change; And the prediction module is used for predicting the humidity of the indoor heat exchanger according to the accumulated shutdown time length and the third temperature difference value.
9. An air conditioner characterized in that the air conditioner uses the heat exchanger humidity change prediction method of an air conditioner according to any one of the above claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein the program performs the heat exchanger humidity change prediction method of the air conditioner of any one of claims 1 to 7.
11. A processor for running a program, wherein the program runs to execute the heat exchanger humidity variation prediction method of the air conditioner according to any one of claims 1 to 7.
12. A computer program product comprising computer instructions which, when executed by a processor, perform the heat exchanger humidity variation prediction method of an air conditioner according to any one of claims 1 to 7.

Description

Method and device for predicting humidity change of heat exchanger of air conditioner Technical Field The invention relates to the technical field of household appliance control, in particular to a method and a device for predicting humidity change of a heat exchanger of an air conditioner. Background In the refrigerating operation process of the air conditioner, the evaporator of the indoor unit is lower than the dew point temperature of indoor air at low temperature, namely, condensed water is generated on the heat exchanger. The time for changing the heat exchanger from wet to dry is identified under different working conditions, and the method has an important effect on controlling and improving the air quality of the air outlet of the air conditioner. In the prior art, although the dew point temperature of the evaporator can be identified by adding an environmental humidity sensor and a temperature sensor, the material cost is increased, the control complexity is increased, and a means for directly predicting the condensate water change condition of the evaporator under the working condition is lacked, so that the drying process of the heat exchanger under different working conditions cannot be accurately controlled, and active control of system parameters before and after the shutdown of the compressor is lacked. In view of the above problems, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the invention provides a method and a device for predicting the humidity change of a heat exchanger of an air conditioner, which at least solve the technical problems that in the prior art, the air conditioner cannot directly judge the temperature and the humidity in a room through system parameters, so that the parameters of the air conditioner system cannot be accurately controlled before and after the air compressor is stopped, and the indoor environment cannot be effectively purified. According to one aspect of the embodiment of the invention, a heat exchanger humidity change prediction method of an air conditioner is provided, and comprises the steps of obtaining a first temperature difference value between the indoor environment temperature of a target room where the air conditioner is located and the set temperature of the air conditioner when the air conditioner is determined to be started and operated in a refrigeration mode, controlling a compressor of the air conditioner to stop when the first temperature difference value is smaller than or equal to a first preset temperature difference value, obtaining a first inner tube temperature of the compressor at the stop time, wherein the first inner tube temperature is the pipeline temperature of an indoor heat exchanger of the air conditioner, obtaining a second temperature difference value between a second inner tube temperature and the first inner tube temperature when the first change rate of the temperature rise rate of the first inner tube temperature is smaller than or equal to the first preset change rate, obtaining an accumulated time of the compressor at the current time and the current time when the second change rate of the temperature rise is larger than or equal to the second preset change rate, and obtaining a second accumulated time of the temperature difference value between the current time and the compressor and the preset time, and obtaining the accumulated time of the heat exchanger. Optionally, when the first change rate of the temperature rise rate of the inner tube temperature along with the change of time is smaller than or equal to a first preset change rate, obtaining a second temperature difference value between a second inner tube temperature and the first inner tube temperature comprises obtaining the temperature rise rate of the inner tube temperature, determining the first change rate of the temperature rise rate along with the time and the first preset change rate, comparing the first change rate with the first preset change rate to obtain a first comparison result, obtaining a second inner tube temperature at the current moment when the first comparison result shows that the first change rate is smaller than or equal to the first preset change rate, and obtaining the second temperature difference value between the second inner tube temperature and the first inner tube temperature. Optionally, after obtaining a second temperature difference value between a second inner tube temperature and the first inner tube temperature, the method further comprises determining that the air conditioner operates in a low-humidity working condition when the second temperature difference value is larger than a second preset temperature difference value, wherein the low-humidity working condition indicates that the condensation water volume of an evaporator of the air conditioner is smaller than a first preset condensation water volume, obtaining the second inner tube temperature at the current moment