CN-115682298-B - Method for detecting filter screen of indoor unit, air conditioner and readable storage medium

Abstract

The invention provides a filter screen detection method of an indoor unit, the indoor unit, an air conditioner and a readable storage medium, wherein the filter screen detection method of the indoor unit comprises the steps of obtaining a first resistance difference value of a filter screen under a set air quantity value, determining a first static pressure value outside the indoor unit in the running process, and determining the filth blockage condition of the filter screen according to the first static pressure value outside the indoor unit and the numerical relation between the set static pressure value outside the indoor unit and the first resistance difference value. The invention detects the filth blockage situation of the filter screen through the numerical relation among the first resistance difference value, the first external static pressure value and the set external static pressure value of the filter screen, thereby realizing that the filth blockage situation of the filter screen can be timely determined in the running process of the air conditioner.

Inventors

• YANG KUN
• ZHOU BAISONG
• ZHUANG LIQIANG

Assignees

• 广东美的暖通设备有限公司
• 合肥美的暖通设备有限公司

Dates

Publication Date

20260512

Application Date

20210728

Claims (12)

1. 1. The utility model provides a filter screen detection method of indoor set, its characterized in that, the indoor set includes the filter screen, the indoor set still includes the fan, the indoor set includes the wind-guiding strip, the wind-guiding strip set up in the air outlet of indoor set, filter screen detection method includes: acquiring a first resistance difference value of the filter screen under a set air quantity value, wherein the first resistance difference value is a resistance change value of the filter screen from an initial clean state to a dirty state; determining a first outdoor static pressure value in the running process of the indoor unit; determining the filth blockage condition of the filter screen according to the numerical relation between the first external static pressure value and the set external static pressure value and the first resistance difference value; the step of determining the filth blockage condition of the filter screen according to the numerical relation between the first external static pressure value and the set external static pressure value and the first resistance difference value specifically comprises the following steps: obtaining a static pressure difference value according to the first external static pressure value and a set external static pressure value; Determining the filth blockage condition of the filter screen according to the numerical relation between the first resistance difference value and the static pressure difference value; The first resistance difference value is related to the current running air quantity of the indoor unit, and the first resistance difference value of the filter screen is determined according to the running air quantity of the indoor unit; the step of determining the first external static pressure value in the running process of the indoor unit specifically comprises the following steps: Collecting an operation current value of the fan; Determining the first outboard static pressure value according to the set air quantity value and the running current value; The step of determining the first outboard static pressure value according to the set air volume value and the running current value specifically includes: Searching a first corresponding relation between a current value and an external static pressure value according to the set air quantity value; Determining a second external static pressure value according to the running current value and the first corresponding relation; Acquiring a static pressure correction value, and calculating to obtain the first external static pressure value according to the second external static pressure value and the static pressure correction value; the first external static pressure value is only influenced by the resistance value of the filter screen; The step of obtaining the static pressure correction value specifically comprises the following steps: collecting the inclination angle of the air guide strip; and acquiring a second corresponding relation between the inclination angle and the correction value, and searching the static pressure correction value according to the inclination angle and the second corresponding relation.
2. 2. The method of claim 1, further comprising, prior to the step of collecting the operating current value of the blower: Collecting the current air quantity value output by the fan; And determining an air volume threshold range according to the set air volume value, and determining that the current air volume value is in the air volume threshold range for a set time length.
3. 3. The method for detecting a filter screen of an indoor unit according to claim 1 or 2, wherein the step of obtaining a first resistance difference value of the filter screen at a set air volume value specifically comprises: Acquiring a third corresponding relation between the air quantity value and the resistance difference value of the filter screen; and searching the first resistance difference value according to the set air quantity value and the third corresponding relation.
4. 4. The method for detecting a filter screen of an indoor unit according to claim 1 or 2, wherein the step of obtaining a first resistance difference value of the filter screen at a set air volume value specifically comprises: Acquiring a second resistance difference value of the filter screen; Acquiring a rated air quantity value of the indoor unit; And calculating the first resistance difference value according to the rated air quantity value, the set air quantity value and the second resistance difference value.
5. 5. The method for detecting a filter screen of an indoor unit according to claim 4, wherein the step of obtaining the second resistance difference value of the filter screen specifically comprises: Acquiring a first set resistance value and a second set resistance value of the filter screen; And calculating a second resistance difference value according to the first set resistance value and the second set resistance value.
6. 6. The method for detecting a filter screen of an indoor unit according to claim 1 or 2, wherein the step of determining a clogging condition of the filter screen according to a numerical relation between the first resistance difference value and the static pressure difference value specifically includes: calculating a ratio of the static pressure difference to the first resistance difference; The ratio is larger than a set value, and the filter screen is determined to be in a dirty blocking state.
7. 7. The method of detecting a screen of an indoor unit of claim 6, further comprising: And outputting first prompt information and/or sending second prompt information to a server based on the filter screen is in the dirty blocking state.
8. 8. The utility model provides a filter screen detection device of indoor set, its characterized in that, the indoor set includes the filter screen, the indoor set still includes the fan, the indoor set includes the wind-guiding strip, the wind-guiding strip set up in the air outlet of indoor set, filter screen detection device includes: The acquisition module is used for acquiring a first resistance difference value of the filter screen under a set air quantity value, wherein the first resistance difference value is a resistance change value of the filter screen from an initial clean state to a dirty blocking state; The first determining module is used for determining a first outdoor static pressure value in the running process of the indoor unit; The second determining module is used for determining the filth blockage condition of the filter screen according to the numerical relation between the first external static pressure value and the set external static pressure value and the first resistance difference value; The second determining module is specifically configured to obtain a static pressure difference value according to the first external static pressure value and the set external static pressure value; Determining the filth blockage condition of the filter screen according to the numerical relation between the first resistance difference value and the static pressure difference value; The first resistance difference value is related to the current running air quantity of the indoor unit, and the first resistance difference value of the filter screen is determined according to the running air quantity of the indoor unit; The first determining module is specifically configured to collect an operation current value of the fan in the indoor unit, and obtain the first external static pressure value according to the operation current value and the set air volume value of the indoor unit; The first determining module is specifically configured to search a first correspondence between a current value and an external static pressure value through the set air volume value, search a second external static pressure value through the first correspondence according to the running current value, obtain a static pressure correction value, and perform difference calculation on the second external static pressure value and the static pressure correction value to obtain the first external static pressure value; the first external static pressure value is only influenced by the resistance value of the filter screen; The first determining module is specifically configured to obtain an inclination angle of the air guiding strip, determine a second corresponding relationship between the inclination angle and a correction value, and find the corresponding static pressure correction value according to the inclination angle through the second corresponding relationship.
9. 9. An indoor unit, comprising: The shell is provided with an air duct; the filter screen is arranged in the air duct; a memory in which a program or instructions are stored; A processor executing a program or instructions stored in the memory to implement the steps of the screen detection method of an indoor unit according to any one of claims 1 to 7.
10. 10. The indoor unit of claim 9, further comprising: the air guide strip is arranged at an air outlet of the air duct; and the output end of the driving motor is connected with the air guide strip and is used for driving the air guide strip to adjust the inclination angle.
11. 11. An air conditioner, comprising: The indoor unit of claim 9 or 10; and the outdoor unit is connected with the indoor unit.
12. 12. A readable storage medium, wherein a program or instructions are stored on the readable storage medium, which when executed by a processor, implement the steps of the method for detecting a filter screen of an indoor unit according to any one of claims 1 to 7.

Description

Method for detecting filter screen of indoor unit, air conditioner and readable storage medium Technical Field The invention belongs to the technical field of air conditioner control, and particularly relates to a filter screen detection method of an indoor unit, a filter screen detection device of the indoor unit, an air conditioner and a readable storage medium. Background In the running process of the air conditioner, the indoor opportunity discharges the air subjected to heat exchange through the filter screen, the filter screen can filter dust in the air, a large amount of dust can be accumulated on the filter screen after the indoor unit is used for a period of time, the filter screen is blocked, the heat exchange performance of the air conditioner can be achieved, and the filtering effect of the filter screen on the air can be affected. The existing air conditioner has no function of accurately detecting the filth blockage condition of the filter screen. Therefore, how to detect the filth blockage of the filter screen of the air conditioner is a urgent problem to be solved. Disclosure of Invention The present invention aims to solve one of the technical problems existing in the prior art or related technologies. For this reason, the first aspect of the present invention proposes a method for detecting a filter screen of an indoor unit. The second aspect of the present invention provides a filter screen detection device for an indoor unit. A third aspect of the present invention proposes an indoor unit. A fourth aspect of the present invention provides an air conditioner. A fifth aspect of the present invention proposes a readable storage medium. In view of this, according to a first aspect of the present invention, there is provided a method for detecting a filter screen of an indoor unit, the indoor unit including a filter screen, the method including obtaining a first resistance difference value of the filter screen at a set air volume value, determining a first static pressure value outside the indoor unit during operation, and determining a filth blockage condition of the filter screen according to a numerical relationship between the first static pressure value outside the indoor unit and the set static pressure value outside the indoor unit and the first resistance difference value. The method for detecting the filter screen of the indoor unit can detect whether the filter screen of the indoor unit has a dirty blockage condition or not. When the indoor unit runs, air before heat exchange enters the indoor unit through the air return opening of the indoor unit, and the filter screen of the indoor unit is arranged at the air return opening and used for filtering the air passing through the air return opening, so that the effect of purifying the air is achieved. The filter screen has an initial resistance value and a final resistance value, wherein the initial resistance value is the resistance value of the filter screen after leaving the factory, namely the resistance value of the filter screen in an initial clean state, the final resistance value is the resistance value of the filter screen under the condition that the filter screen needs to be cleaned or replaced, and the resistance difference value can be obtained by carrying out difference value calculation on the final resistance value and the initial resistance value. Under the condition that the air conditioner runs at different air volumes, the resistance difference value of the filter screen is also different. Under the condition that the indoor unit is controlled to operate at the set air quantity, a first resistance difference value corresponding to the set air quantity is obtained. And determining a first outdoor static pressure value of the indoor unit in the current running state, wherein the first outdoor static pressure value is the outdoor static pressure value in the running process of the air quantity value under the current hardware condition of the indoor unit. The method comprises the steps of setting an off-board static pressure value to be a pre-stored off-board static pressure value corresponding to a set air volume value, and setting the off-board static pressure value, wherein the off-board static pressure value is acquired after the air conditioner is installed, namely, the off-board static pressure value acquired by running the air conditioner under a brand new state of a filter screen is the off-board static pressure value. According to the numerical relation of the first external static pressure value, the set external static pressure value and the first resistance difference value, the filth blockage condition of the filter screen can be judged. It can be understood that the static pressure value outside the air conditioner collected during operation changes along with the dirt blocking of the filter screen, so that the dirt blocking condition of the filter screen can be judged according to the numerical relation o