WO2019153665A1

WO2019153665A1 - Filter screen cleanliness detection method, filter screen cleanliness sensor and air treatment apparatus

Info

Publication number: WO2019153665A1
Application number: PCT/CN2018/097394
Authority: WO
Inventors: 周宏明; 李玉; 苏立志
Original assignee: 芜湖美智空调设备有限公司; 美的集团股份有限公司
Priority date: 2018-02-08
Filing date: 2018-07-27
Publication date: 2019-08-15
Also published as: CN108333149A; CN108333149B

Abstract

Disclosed in the present application are a filter screen cleanliness detection method, a filter screen cleanliness sensor and an air treatment apparatus. The filter screen cleanliness sensor comprises a first light emission assembly and a first light reception assembly, the first light emission assembly and the first light reception assembly are provided at a same side of an installation position of a filter screen, the first light emission assembly is configured to emit first detection light, and the first light reception assembly is configured to receive the first detection light reflected by the filter screen. The filter screen cleanliness detection method comprises the following steps: controlling the first light emission assembly to emit the first detection light, and acquiring a first optical intensity signal received by the first light reception assembly; comparing the intensity of the first optical intensity signal and a first preset intensity; when the intensity of the first optical intensity signal is less than the first preset intensity, determining that the filter screen is in a un-installed state; and when the intensity of the first optical intensity signal is greater than or equal to the first preset intensity, determining that the filter screen is in an installed state.

Description

Filter cleanliness detection method and filter cleanliness sensor, air treatment equipment

Technical field

The present application relates to the field of sensing technologies, and in particular, to a filter cleaning degree detecting method, a screen cleaning degree sensor, and an air processing device.

Background technique

In the air treatment equipment, a filter screen is usually provided, which can prevent the impurities in the indoor air from entering the air treatment equipment and cause equipment failure, and can also improve the indoor air quality. As the use time increases, dust, germs, etc. will adhere to the filter screen, so it is necessary to check the cleanliness of the filter. The sensor set to detect the cleanliness of the filter includes a light emitting component and a light receiving component, and is respectively installed on both sides of the filter. When dust, germs, etc. are attached to the filter, the light intensity received by the light receiving component will change. This reflects the change in the cleanliness of the filter. However, the existing filter cleanliness sensor is difficult to achieve effective resolution of the filter installation state, resulting in a decrease in detection accuracy.

Summary of the invention

The main purpose of the present application is to provide a filter cleanliness detection method, which aims to solve the technical problem of the above-mentioned difficult to distinguish the installation state of the filter screen, and improve the detection accuracy of the filter cleanliness sensor.

To achieve the above object, the present application provides a screen cleanliness detecting method, wherein the screen cleanliness sensor includes a first light emitting component and a first light receiving component, the first light emitting component and the first light The receiving component is disposed on the same side of the filter installation position, the first light emitting component is configured to emit the first detecting light, and the first light receiving component is configured to receive the first detecting light reflected by the filter mesh;

The filter cleanliness detection method includes the following steps:

Controlling the first light emitting component to emit first detecting light, and acquiring a first light intensity signal received by the first light receiving component;

Comparing the intensity of the first light intensity signal with a first preset intensity;

When the intensity of the first light intensity signal is less than the first preset intensity, determining that the filter screen is in an unmounted state;

When the intensity of the first light intensity signal is greater than or equal to the first preset intensity, it is determined that the screen is in an installed state.

Optionally, the step of comparing the intensity of the first light intensity signal with the first preset intensity comprises:

Comparing the intensity of the first light intensity signal and the first preset intensity according to a preset time interval;

Determining that the intensity of the first light intensity signal is less than the first preset intensity when the intensity of the first light intensity signal of the first predetermined number of times is less than the first preset intensity;

Determining that the intensity of the first light intensity signal is greater than or equal to the first preset intensity when the intensity of the first light intensity signal is greater than or equal to the first preset intensity;

Otherwise, after accumulating the preset duration, returning to the step of comparing the intensity of the first light intensity signal with the first preset intensity according to a preset time interval.

Optionally, the screen cleanliness sensor further includes a second light receiving component, and the second light receiving component and the first light emitting component are correspondingly disposed on two sides of the filter installation position, the first The two light receiving components are configured to receive the first detection light transmitted through the filter screen;

After the step of determining that the screen is in an installed state, the screen cleanliness detecting method further includes the following steps:

Acquiring the cleanliness value of the filter or calibrating the filter cleanliness sensor according to the first detection light emitted by the first light emitting component and the second light intensity signal received by the second light receiving component.

Optionally, when the filter screen is in an installed state, acquiring the filter screen according to the first detection light emitted by the first light emitting component and the second light intensity signal received by the second light receiving component. The steps of the cleanliness value include:

Controlling the first light emitting component to emit the first detecting light at a first standard emission intensity, and acquiring a second light intensity signal received by the second light receiving component;

Calculating a ratio of the intensity of the second light intensity signal to the first standard received light intensity, which is recorded as the cleanliness value of the filter;

Wherein the first standard receiving light intensity is when the first light emitting component emits the first detecting light by using the first standard emission light intensity when the filter screen is clean, the second light receiving component receives the first The intensity of the two light intensity signals.

Optionally, when the filter screen is in an installed state, the filter is calibrated according to the first detection light emitted by the first light emitting component and the second light intensity signal received by the second light receiving component. The steps of the cleanliness sensor include:

Obtain calibration instructions;

Comparing the intensity of the second light intensity signal with a second preset intensity;

When the intensity of the second light intensity signal is greater than or equal to the second preset intensity, updating the first standard received light intensity to the intensity of the current second light intensity signal;

Adjusting an intensity of the first detection light emitted by the first light emitting component and acquiring a second light intensity received by the second light receiving component when the intensity of the second light intensity signal is less than a second predetermined intensity signal;

When the difference between the third preset intensity minus the intensity of the second light intensity signal is greater than or equal to zero and less than the first preset difference, updating the first standard emission intensity to the current first detection light intensity, And updating the first standard received light intensity to the intensity of the current second light intensity signal.

Optionally, the screen cleanliness sensor further includes a second light emitting component, and the second light emitting component and the first light receiving component are correspondingly disposed on two sides of the filter installation position, the first The second light emitting component is configured to emit a second detecting light, the first light receiving component is further configured to receive the second detecting light transmitted through the screen, and the second light receiving component is further configured to receive the filtering a second detection light reflected by the mesh;

The filter cleanliness detection method includes the following steps:

Controlling the first light emitting component to emit first detecting light, the second light emitting component is turned off, and acquiring a first light intensity signal received by the first light receiving component;

Comparing the intensity of the first light intensity signal with a fourth preset intensity;

When the intensity of the first light intensity signal is greater than or equal to the fourth predetermined intensity, determining that the screen is in an installed state, and the first light emitting component is normal;

When the intensity of the first light intensity signal is less than a fourth predetermined intensity, controlling the first light emitting component to be turned off, the second light emitting component emitting second detecting light, and acquiring the second light receiving component The received second light intensity signal;

Comparing the intensity of the second light intensity signal with a fifth preset intensity;

When the intensity of the second light intensity signal is less than the fifth preset intensity, determining that the screen is in an unmounted state;

When the intensity of the second light intensity signal is greater than or equal to the fifth predetermined intensity, it is determined that the screen is in an installed state, and the first light emitting component is abnormal.

Optionally, after the step of determining that the first light emitting component is abnormal, the screen cleanliness detecting method further includes the following steps:

Obtaining a cleanliness value of the filter according to the second detection light emitted by the second light emitting component and the first light intensity signal received by the first light receiving component when the filter is in an installed state Or calibrate the filter cleanliness sensor.

Optionally, after the step of determining that the first light emitting component is normal, the screen cleanliness detecting method further includes the following steps:

Obtaining a calibration command when the filter is in an installed state;

Controlling the first light emitting component to emit first detecting light at a first standard emission intensity, the second light emitting component is turned off, and acquiring a second light intensity signal received by the second light receiving component;

Comparing the intensity of the second light intensity signal with a sixth preset intensity;

When the intensity of the second light intensity signal is greater than or equal to the sixth preset intensity, updating the first standard received light intensity to the intensity of the current second light intensity signal;

Adjusting an intensity of the first detection light emitted by the first light emitting component and acquiring a second light intensity received by the second light receiving component when the intensity of the second light intensity signal is less than a sixth predetermined intensity signal;

When the difference between the seventh preset intensity minus the intensity of the second light intensity signal is greater than or equal to zero and less than the second preset difference, updating the first standard emitted light intensity to the current first detected light intensity, And updating the first standard received light intensity to the intensity of the current second light intensity signal;

Controlling the first light emitting component to be turned off, and the second light emitting component emitting second detecting light;

Adjusting an intensity of the second detection light emitted by the second light emitting component, and acquiring a first light intensity signal received by the first light receiving component;

When the absolute value of the difference between the first standard received light intensity and the intensity of the second light intensity signal is less than or equal to the third preset difference, the second standard emitted light intensity is updated to the current second detected light intensity, And updating the second standard received light intensity to the intensity of the current first light intensity signal.

Optionally, the filter cleanliness sensor further comprises the following steps:

When it is determined that the filter screen is in an unmounted state, generating a first prompt signal;

A second prompt signal is generated when it is determined that the screen is in an installed state.

The present application also provides a screen cleanliness sensor comprising a first light emitting component and a first light receiving component, the first light emitting component being configured to emit first detecting light; the first light receiving component And the first light emitting component is disposed on a same side of the screen mounting position, the first light receiving component being configured to receive the first detecting light reflected by the screen.

Optionally, the screen cleanliness sensor further includes a second light receiving component corresponding to the first light emitting component on two sides of the filter installation position, and the second light receiving component is configured to receive The first detection light transmitted through the screen.

Optionally, the screen cleanliness sensor further includes a second light emitting component corresponding to the first light receiving component on two sides of the filter installation position, and the second light emitting component is configured to emit a second detecting light; the first light receiving component is further configured to receive second detecting light transmitted through the screen; the second light receiving component is further configured to receive second detecting light reflected by the screen .

The present application further provides an air treatment apparatus including a screen cleanliness sensor, a memory, a processor, and a screen cleanliness detection program stored on the memory and operable on the processor, The screen cleanliness detection program is implemented by the processor to implement a step of a filter cleanliness detecting method, the screen cleansing sensor comprising a first light emitting component and a first light receiving component, the first light The transmitting component and the first light receiving component are disposed on the same side of the screen mounting position, the first light emitting component is configured to emit first detecting light, and the first light receiving component is configured to receive the filter a first detection light that is reflected; the filter cleanliness detection method includes the steps of: controlling the first light emitting component to emit a first detection light, and acquiring a first light intensity signal received by the first light receiving component; Comparing the intensity of the first light intensity signal with a first preset intensity; determining that the filter screen is in an unmounted state when the intensity of the first light intensity signal is less than the first predetermined intensity; When the intensity of the first light intensity signal is greater than or equal to a first predetermined intensity, the filter is determined in a mounted state.

In the technical solution of the present application, the screen cleanliness sensor includes a first light emitting component and a first light receiving component, and the first light emitting component and the first light receiving component are disposed on the same side of the filter mounting position, and the first light emitting The component is configured to emit the first detection light, the first light receiving component is configured to receive the first detection light reflected by the filter; the filter cleanliness detection method comprises the steps of: controlling the first light emitting component to emit the first detection light, and Acquiring the first light intensity signal received by the first light receiving component; comparing the intensity of the first light intensity signal with the first preset intensity; when the intensity of the first light intensity signal is less than the first preset intensity, determining that the filter is at The unmounted state; when the intensity of the first light intensity signal is greater than or equal to the first preset intensity, it is determined that the filter is in an installed state. The first detection light reflected by the filter is received by setting the first light receiving component on the same side of the screen as the first light emitting component to determine whether the filter has been installed. The additionally provided first light receiving component is low in cost, simple in structure, and easy to integrate into the existing filter cleanness sensor, thereby achieving the effect of improving the detection performance and anti-interference ability of the filter cleanliness sensor at a low cost. Moreover, compared with the prior art, by determining the strength of the transmission signal of the first detection light, whether the filter is installed or not is determined by detecting the presence or absence of the reflection signal of the first detection light, thereby greatly reducing the received The detection accuracy of the optical signal intensity can obtain a good detection effect and improve the accuracy of the filter cleanliness detection.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and other drawings can be obtained according to the structures shown in the drawings without any creative work for those skilled in the art.

1 is a schematic structural view of a filter screen cleansing sensor according to an embodiment of the present invention;

2 is a schematic structural view of the screen of FIG. 1 in an unmounted state;

3 is a schematic flow chart of a first embodiment of a method for detecting cleanliness of a filter according to the present application;

4 is a schematic flow chart of a second embodiment of a method for detecting cleanliness of a filter according to the present application;

5 is a schematic flowchart of the refinement of step S200 in the third embodiment of the method for detecting cleanliness of the filter according to the present application;

6 is a schematic flow chart of a fourth embodiment of a method for detecting cleanliness of a filter according to the present application;

7 is a schematic diagram of a refinement process of step S500 in the fifth embodiment of the method for detecting cleanliness of the filter according to the present application;

8 is a schematic diagram of a refinement process of step S500 in the sixth embodiment of the method for detecting cleanliness of the filter according to the present application;

9 is a schematic structural view of a filter screen in a state in which another embodiment of the filter cleansing sensor of the present application is installed;

Figure 10 is a schematic structural view of the screen of Figure 9 in an unmounted state;

11 is a schematic flow chart of a seventh embodiment of a method for detecting cleanliness of a filter according to the present application;

12 is a schematic flow chart of an eighth embodiment of a method for detecting cleanliness of a filter according to the present application;

13 is a partial flow chart of a ninth embodiment of a method for detecting cleanliness of a screen according to the present application.

The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

It should be noted that, if there is a directional indication (such as up, down, left, right, front, back, ...) in the embodiment of the present application, the directional indication is only used to explain in a certain posture (as shown in the drawing) The relative positional relationship between the components, the motion situation, and the like, if the specific posture changes, the directional indication also changes accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is used for descriptive purposes only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. Nor is it within the scope of protection required by this application.

In the present application, the detection state reflected by the filter screen is received, and the installation state of the filter screen is discriminated to improve the accuracy of the cleanliness detection.

In the first embodiment of the present application, as shown in FIGS. 1 and 2, an arrow indicates a direction of propagation of light, and the screen cleanliness sensor includes a first light emitting component 11 and a first light receiving component 21, first The light emitting component 11 and the first light receiving component 21 are disposed on the same side of the mounting position of the screen 30, the first light emitting component 11 is arranged to emit the first detecting light, and the first light receiving component 21 is arranged to receive the reflected by the screen. The first detection light.

Specifically, the first light emitting component 11 can select a light emitting diode or a light emitting diode. Under the control of the circuit, the first light emitting component 11 emits the first detecting light, and after the first detecting light is reflected by the screen 30, the first light can be used. The receiving component 21 receives it. Wherein, the first detection light may be continuous or pulsed. The first light receiving component 21 can receive not only the first detected light that is reflected, but also a small amount of ambient light. In order to minimize the interference of the ambient light on the cleanliness detection of the filter 30, infrared light may be selected as the first detection light, that is, an infrared light emitting diode or an infrared light emitting diode is selected as the first light emitting component 11, and correspondingly, infrared light sensitive is selected. The triode acts as the first light receiving component 21.

As shown in FIG. 3, the filter cleanliness detection method includes the following steps:

Step S100, controlling the first light emitting component 11 to emit the first detecting light, and acquiring the first light intensity signal received by the first light receiving component 21;

Step S200: comparing the intensity of the first light intensity signal with the first preset intensity;

Step S310, when the intensity of the first light intensity signal is less than the first preset intensity, determining that the filter screen is in an unmounted state;

Step S320: When the intensity of the first light intensity signal is greater than or equal to the first preset intensity, determine that the filter screen is in an installed state.

In the process of detecting the cleanliness of the filter or during the calibration of the filter cleansing sensor, and when the user needs to determine whether the filter has been installed, the first light emitting component 11 in the filter cleansing sensor is in an automatic program or The first detection light is emitted under the control of the manual command. While the first light emitting component 11 emits the first detecting light, the first light intensity signal received by the first light receiving component 21 is acquired, thereby implementing monitoring or determining the installation state of the screen. Specifically, as shown in FIG. 1, when the filter screen is in a normal installation state, the first detection light emitted by the first light emitting component 11 is partially reflected by the filter screen 30, and is disposed in the filter with the first light emitting component 11. The first light receiving component 21 on the same side of the net 30 is received; as shown in FIG. 2, when the screen is in an unmounted state, the first detecting light emitted by the first light emitting component 11 is not reflected, correspondingly, The intensity of the first light intensity signal received by a light receiving component 21 is comparable to the light intensity of the corresponding band in the environment, typically zero or small. Based on the above principle, in the embodiment, by comparing the intensity of the first light intensity signal with the first preset intensity, the installation state of the filter screen can be determined, that is, when the intensity of the first light intensity signal is less than the first preset intensity When it is determined that the filter is in an unmounted state, when the intensity of the first light intensity signal is greater than or equal to the first preset intensity, it is determined that the filter is in an installed state. The first preset intensity may be set according to the light intensity of the corresponding band in the environment. Taking the first detection light as the infrared light as an example, the first light emitting component 11 is turned off, and the first light currently detected by the first light receiving component 21 is obtained. The intensity of the strong signal is set to the first preset intensity, or the first preset intensity is set near the above intensity to reserve a certain amount of fault tolerance.

Further, in this embodiment, in order to prevent the first detection light emitted by the first light emitting component 11 from being directly received by the first light receiving component 21, causing interference to the detection result, the first light emitting component 11 and the first A light shielding device is disposed between the light receiving components 21, for example, below the emitting portion of the first light emitting component 11 and/or below the receiving portion of the first light receiving component 21 to reduce the emission angle and/or receive. An angle, thereby blocking light radiated directly from the first light emitting component 11 to the first light receiving component 21.

In this embodiment, the screen cleanliness sensor includes a first light emitting component 11 and a first light receiving component 21, and the first light emitting component 11 and the first light receiving component 21 are disposed on the same side of the mounting position of the screen 30. The first light emitting component 11 is configured to emit first detecting light, and the first light receiving component 21 is configured to receive the first detecting light reflected by the screen; the screen cleanliness detecting method comprises the steps of: controlling the first light emitting component 11 Transmitting the first detection light, and acquiring the first light intensity signal received by the first light receiving component 21; comparing the intensity of the first light intensity signal with the first preset intensity; when the intensity of the first light intensity signal is less than the first When the intensity is set, it is determined that the filter 30 is in an unmounted state; when the intensity of the first light intensity signal is greater than or equal to the first preset intensity, it is determined that the filter 30 is in an installed state. Passing through the first light emitting component 11 of the screen 30 The first light receiving component 21 is disposed on the same side, and receives the first detecting light reflected by the screen 30 to determine whether the screen 30 has been mounted. The additionally provided first light receiving component 21 is low in cost, simple in structure, and easy to integrate into the existing filter cleanness sensor, thereby improving the detection performance and anti-interference ability of the filter cleanliness sensor at a low cost. And determining whether the filter is installed by detecting the intensity of the transmission signal of the first detection light in the prior art, in the present solution, by detecting the presence or absence of the reflection signal of the first detection light, the judgment is greatly reduced, and the reception is greatly reduced. The detection accuracy of the optical signal intensity is required, and at the same time, a good detection effect can be obtained, and the accuracy of the filter cleanliness detection is improved.

In the second embodiment of the present application, as shown in FIG. 4, the screen cleanliness detecting method further includes the following steps:

Step S400: Generate a first prompt signal when determining that the filter screen is in an unmounted state; and/or generate a second prompt signal when determining that the filter screen is in an installed state.

When the filter 30 is not installed, the detection or calibration of the filter cleanliness sensor will be aborted. In this embodiment, the first prompt signal is generated to remind the user to eliminate the abnormality of the filter screen in time, and the normal operation of the filter cleanliness sensor and the air processing device is ensured. Of course, the second prompt signal may also be generated when the filter 30 is in the installed state, so that the user confirms that the filter state is normal. Alternatively, when the filter is in an unmounted state, a first prompt signal is generated, and when the filter is in an installed state, a second prompt signal is generated to allow the user to confirm the filter status. The first prompt signal or the second prompt signal may be characterized by a light of the indicator light, a buzzer of the buzzer, or the like. It should be noted that this embodiment can also be combined with the embodiments in the following.

In the third embodiment of the present application, as shown in FIG. 5, step S200 includes:

Step S210, comparing the intensity of the first light intensity signal with the first preset intensity according to a preset time interval;

Step S221: determining that the intensity of the first light intensity signal is less than the first preset intensity when the intensity of the first predetermined intensity signal of the first predetermined number of times is less than the first preset intensity;

Step S222, determining that the intensity of the first light intensity signal is greater than or equal to the first preset intensity when the intensity of the first predetermined intensity signal is greater than or equal to the first preset intensity;

Step S223. Otherwise, after the preset duration is accumulated, the process returns to step S210.

In this embodiment, considering that the detection jump caused by the performance instability may occur during the operation of the first light receiving component 21, or the user pulls the filter screen, or the ambient light flickers, etc., the first light intensity signal The strength may fluctuate, resulting in misjudgment of the installation state of the screen 30. Therefore, a certain number of first light intensity signals are acquired according to preset time intervals and compared with the first preset intensity. The preset time interval may be set to be less than or equal to 2 minutes, that is, the intensity of the first light intensity signal is acquired at a relatively short preset time interval, so as to prevent the filter from being installed or removed between the two measurements. This leads to a decrease in detection accuracy. When the intensity of the first intensity signal that is compared for the first predetermined number of times is less than the first preset intensity, it indicates that the filter is in a stable unmounted state, and the first light intensity is compared when the second preset number of times is consecutive When the signal is greater than or equal to the first preset intensity, it indicates that the filter is in a stable installed state. The first preset number of times and the second preset number of times may be equal or unequal. Usually, the first preset number of times and the second preset number of times are equal. Of course, in order to determine the unmounted state of the filter screen more sensitively and quickly, so that the first detection light emitted by the first light emitting component 11 does not damage other components of the filter cleanliness sensor or other components in the air processing device, it may be set. The smaller first preset number of times. In addition, when the comparison result between the intensity of the first light intensity signal and the first preset intensity does not belong to the above two cases, that is, the intensity of the first light intensity signal fluctuates up and down at the first preset intensity, indicating that the filter cleanliness The sensor is in an unstable state, either due to a detection jump, or the user pulls the filter, or the ambient light flickers. In this embodiment, the preset preset duration is accumulated, that is, after waiting for the preset duration, the intensity of the first light intensity signal and the first preset strength are compared according to the preset time interval to avoid judging the filter screen in an unstable state. The installation status improves the accuracy of the judgment. The first preset duration can be set to be relatively long 3 to 10 minutes, that is, after the state of the filter or the filter cleanliness sensor is stabilized, the judgment is performed.

In the fourth embodiment of the present application, as shown in FIG. 1 and FIG. 2, the screen cleanliness sensor further includes a second light receiving component 22, and the second light receiving component 22 and the first light emitting component 11 are correspondingly arranged in the filter. The two sides of the mounting position of the net 30, the second light receiving component 22 is configured to receive the first detection light transmitted through the filter;

As shown in FIG. 6, after the step of determining that the filter screen is in an installed state, the filter cleanliness detection method further includes the following steps:

Step S500: Acquire a cleanliness value of the filter or a calibration filter cleanliness sensor according to the first detection light emitted by the first light emitting component 11 and the second light intensity signal received by the second light receiving component 22.

When the screen is in the mounted state, a portion of the first detection light emitted by the first light emitting component 11 is transmitted through the screen, and is received by the second light receiving component 22, according to the second light intensity received by the second light receiving component 22. The intensity of the signal can be used to obtain the cleanliness value of the filter screen 30. Specifically, when the filter screen 30 is in a clean state, the intensity of the second light intensity signal received by the second light receiving component 22 is the largest, and gradually increases with the filter screen 30. Dirty blockage, the intensity of the second light intensity signal gradually weakens. Further, it is considered that the emission intensity of the first light-emitting component 11 is attenuated over time, and the state of the filter screen changes every time the user cleans or replaces the filter screen, so it is necessary to have a filter cleanliness sensor. Recalibrate to improve the accuracy of the test. The calibration can be started under the control of the automatic or manually generated command. Before the detection, after detecting the problem or after replacing and cleaning the filter, the calibration is started by acquiring the calibration command, so that the cleanliness of the filter 30 is normally detected after the calibration is completed. .

It should be noted that in this embodiment, if it is detected that the filter is removed or is in an unstable state during the process of acquiring the cleanliness value of the filter or calibrating the filter cleanliness sensor, the detection or the detection should be immediately suspended. Calibration, you can generate a corresponding prompt signal to remind the user to process, after the installation state of the filter is stable, to improve the accuracy of detection or calibration.

In the fifth embodiment of the present application, as shown in FIG. 7, the cleanliness of the filter is obtained according to the first detection light emitted by the first light emitting component 11 and the second light intensity signal received by the second light receiving component 22. The steps for the value include:

Step S511, controlling the first light emitting component 11 to emit the first detecting light with the first standard emitting light intensity, and acquiring the second light intensity signal received by the second light receiving component 22;

Step S512, calculating a ratio of the intensity of the second light intensity signal to the first standard received light intensity, which is recorded as the cleanliness value of the filter.

The first standard receiving light intensity is to control the first light emitting component 11 to emit the first detecting light with the first standard emitting light intensity, and the second light receiving component 22 receives the second light intensity when the filter net 30 is in the clean state. The strength of the signal. As the filter is gradually blocked, its cleanliness decreases, the transmittance of the first detection light decreases, and the intensity of the second light intensity signal decreases accordingly. In the present embodiment, the ratio of the intensity of the second light intensity signal to the received light intensity of the first standard is used as the cleanliness value of the screen 30. When the filter is in a clean state, its cleanliness value is 100%, and when the filter is in a completely dirty state, its cleanliness value is 0%.

In the sixth embodiment of the present application, as shown in FIG. 8, when the filter screen is in the mounted state, the first detection light emitted by the first light emitting component and the second light intensity signal received by the second light receiving component are received. The steps to calibrate the filter cleanliness sensor include:

Step S521, obtaining a calibration instruction;

Step S522, controlling the first light emitting component 11 to emit the first detecting light with the first standard emitting light intensity, and acquiring the second light intensity signal received by the second light receiving component 22;

Step S523, comparing the intensity of the second light intensity signal with the second preset intensity;

Step S524, when the intensity of the second light intensity signal is greater than or equal to the second preset intensity, updating the first standard received light intensity to the intensity of the current second light intensity signal;

Step S525, when the intensity of the second light intensity signal is less than the second preset intensity, adjusting the intensity of the first detection light emitted by the first light emitting component 11 and acquiring the second light intensity signal received by the second light receiving component 22 ;

Step S526, when the difference between the intensity of the third preset intensity minus the second light intensity signal is greater than or equal to zero and less than the first preset difference, updating the first standard emission intensity to the current first detection light intensity. And updating the first standard received light intensity to the intensity of the current second light intensity signal.

According to the working principle of the filter cleanliness sensor, when the filter screen 30 is in a clean state, the second light receiving component 22 receives the intensity of the second light intensity signal at the maximum, and the second light is gradually blocked with the filter screen 30. The intensity of the second light intensity signal received by the receiving component 22 gradually decreases. Therefore, after each change or cleaning of the filter screen 30, since the transmittance of the first filter light by the different filter screens 30 is different, in order to improve the accuracy of the detection, it is necessary to recalibrate the filter cleanliness sensor. In addition, the second light receiving component 22 can be a phototransistor, and the phototransistor converts the optical signal into an electrical signal, and has three working states: a cutoff zone, an amplification zone, and a saturation zone. When the phototransistor operates in the cut-off region, it has not been fully turned on. As the intensity of the second light intensity signal increases, the electrical signal intensity generated by the second light receiving component 22 increases slightly, but is substantially zero; when the phototransistor When operating in the amplification region, the electrical signal intensity generated by the second light receiving component 22 and the intensity of the second light intensity signal are substantially linear, thereby more intuitively reflecting the intensity variation of the second light intensity signal, reducing nonlinearity. The distortion interferes with the detection process; when the phototransistor operates in the saturation region, even if the intensity of the second light intensity signal is further increased, since the second light receiving component 22 is saturated, the electrical signal intensity generated by the second light receiving component is substantially unchanged. As time increases, the intensity of the first detection light emitted by the first illumination component 11 gradually decreases. When the intensity of the first detection light is too low, the second light receiving component 22 will operate in the cut-off zone and cannot accurately reflect the filter. The change in the cleanliness of the mesh, or the second light-receiving component 22 operates in a linear region close to the cut-off region, at which point the filter cleansing sensor has a small detection range and is easily cut off. Therefore, it is also necessary to calibrate the filter cleanliness sensor to work as much as possible in the linear region. The calibration of the filter cleanliness sensor is triggered by a calibration command, which may be automatically generated, for example, when it is detected that the filter has been replaced or cleaned, specifically the second light intensity received by the second light receiving component 22 last time. The calibration command is generated when the strength of the signal is significantly less than the intensity of the received second light intensity signal; or the calibration command may be manually issued by the user as needed. After acquiring the calibration command, the first light emitting component 11 is controlled to emit the first detecting light at the first standard light intensity, and obtain the second light intensity signal received by the second light receiving component 22, if the intensity of the second light intensity signal Greater than or equal to the second preset intensity, indicating that the light intensity attenuation of the first light emitting component 11 is still within an acceptable range, directly using the intensity of the current second light intensity signal as the updated first standard receiving light intensity, so that The first standard received light intensity built into the current filter cleanliness sensor matches the current filter status after replacement or cleaning. When the intensity of the second light intensity signal is less than the second predetermined intensity, it indicates that the attenuation of the first light emitting component 11 is serious at this time, and it is necessary to re-determine the first standard emission light intensity. Specifically, adjusting the intensity of the first detection light emitted by the first light emitting component 11 and acquiring the second light intensity signal received by the second light receiving component, when the third preset intensity is lower than the intensity of the second light intensity signal When the value is greater than or equal to zero and less than the first preset difference, the first standard emitted light intensity is updated to the current first detected light intensity, and the first standard received light intensity is updated to the current second light intensity signal. Therefore, the filter cleanliness sensor can work normally in the amplification area, and the first light emitting component 11 emits the first light emission intensity by adjusting the intensity of the first detecting light emitted by the first light emitting component 11 as much as possible. When the light is detected and the filter is clean, the intensity of the second light receiving component 22 received by the second light receiving component 22 is close to the boundary between the enlarged area and the saturated area, thereby achieving a better detection effect. Specifically, after being calibrated, the first standard received light intensity is the maximum light intensity that the second light receiving component 22 may receive during the change of the screen state, and is close to the junction point between the enlarged area and the saturated area, thereby facilitating Make full use of the amplification area to cover a wider detection range and improve the detection performance of the sensor. Wherein, the third preset intensity corresponds to the intensity of the second light intensity signal at the intersection point between the amplification area and the saturation area, and the first preset difference value may be set to a smaller value to enable the first standard receiving light There is a certain amount of fault tolerance between the strong relative and the saturation zone, and the second light receiving component 22 is guaranteed to operate in the amplification zone.

In the seventh embodiment of the present application, as shown in FIG. 9 and FIG. 10, the screen cleanliness sensor further includes a second light emitting component 12, and the second light emitting component 12 and the first light receiving component 21 are correspondingly arranged in the filter. On both sides of the mounting position of the net 30, the second light emitting component 12 is arranged to emit second detecting light, the first light receiving component 21 is further arranged to receive the second detecting light transmitted through the screen 30, and the second light receiving component 22 is further Provided to receive the second detection light reflected by the filter screen 30;

As shown in FIG. 11, the filter cleanliness detection method includes the following steps:

Step S100', controlling the first light emitting component to emit 11 first detecting light, the second light emitting component 12 is turned off, and acquiring the first light intensity signal received by the first light receiving component 21;

Step S200', comparing the intensity of the first light intensity signal with the fourth preset intensity;

Step S310', when the intensity of the first light intensity signal is greater than or equal to the fourth preset intensity, determining that the filter screen is in an installed state, and the first light emitting component is normal;

Step S320', when the intensity of the first light intensity signal is less than the fourth preset intensity, controlling the first light emitting component 11 to be turned off, the second light emitting component 12 to emit the second detecting light, and acquiring the second light receiving component receiving 22 Second light intensity signal;

Step S400', comparing the intensity of the second light intensity signal with the fifth preset intensity;

Step S510', when the intensity of the second light intensity signal is less than the fifth preset intensity, determining that the filter screen is in an unmounted state;

Step S520', when the intensity of the second light intensity signal is greater than or equal to the fifth preset intensity, it is determined that the screen is in the installed state, and the first light emitting component 11 is abnormal.

When the intensity of the first light intensity signal received by the first light receiving component 21 is small, one may not have the filter 30 installed. Another possibility is that the first light emitting component 11 is faulty and the first detecting light cannot be normally emitted. In the present embodiment, by providing the second light emitting unit 12, the above two cases can be effectively distinguished. In order to reduce the interference of ambient light, the second light emitting component 12 may be an infrared light emitting diode or an infrared light emitting diode. The fourth preset intensity may be set according to the light intensity of the corresponding band in the environment, and the first light receiving component 21 receives the first light intensity signal when the first light emitting component 11 and the second light emitting component 12 are turned off. The intensity of the fourth preset intensity is set near the above intensity to reserve a certain amount of fault tolerance. Similarly, the fifth preset intensity may also be set according to the light intensity of the corresponding band in the environment, and the second light receiving component 22 receives the second light when the first light emitting component 11 and the second light emitting component 12 are turned off. The intensity of the strong signal, or the fifth preset intensity is set near the above intensity to reserve a certain amount of fault tolerance. When determining the installation state of the filter screen, the first light emitting component is controlled to emit 11 first detection light, the second light emitting component 12 is turned off, and the first light intensity signal received by the first light receiving component 21 is obtained, if the filter 30 Once the first light emitting component 11 is installed, the first light receiving component 21 will receive the first detecting light reflected by the screen 30, and correspondingly, the intensity of the first light intensity signal is greater than or equal to the fourth predetermined If the filter is not installed, the first light receiving component 21 cannot receive the reflected light, and correspondingly, the intensity of the first light intensity signal is less than the fourth preset intensity. It should be noted that if the first light emitting component 11 is faulty, the first light receiving component 21 may not receive the reflected light, that is, the intensity of the first light intensity signal is less than the fourth predetermined intensity. Therefore, it is necessary to continue to distinguish between the above two cases. Controlling the first light emitting component 11 to be turned off, the second light emitting component 12 emitting the second detecting light, and acquiring the second light intensity signal of the second light receiving component receiving 22. The second light emitting component 12 is a backup light emitting component that is typically kept in a closed state and has a longer life than the first light emitting component 11. When the second light emitting component 12 emits the second detecting light, as shown in FIG. 10, if the screen 30 is not installed, the second light receiving component 22 will not receive the second detecting light reflected by the screen 30, Correspondingly, the intensity of the second light intensity signal is less than the fifth predetermined intensity; as shown in FIG. 9, when the filter screen 30 has been installed, the second light receiving component 22 will receive the second detection reflected by the filter screen 30. The light, correspondingly, when the intensity of the second light intensity signal is greater than or equal to the fifth predetermined intensity, can simultaneously determine that the first light emitting component 11 is abnormal.

Similarly, in this embodiment, in order to prevent the second detection light emitted by the second light emitting component 12 from being directly received by the second light receiving component 22, causing interference to the detection result, the second light emitting component 12 and the A certain shading device is disposed between the two light receiving components 22, for example, a light pupil is disposed above the emitting portion of the second light emitting component 12 and/or above the receiving portion of the second light receiving component 22 to reduce the emission angle and/or receive An angle, thereby blocking light radiated directly from the second light emitting component 12 to the second light receiving component 22.

In the eighth embodiment of the present application, as shown in FIG. 12, after the step of determining that the first light emitting component 11 is abnormal, the screen cleanliness detecting method further includes the following steps:

Step S600', when the filter screen 30 is in the installed state, according to the second detection light emitted by the second light emitting component 12 and the first light intensity signal received by the first light receiving component 21, the cleanliness value of the filter is obtained or Calibrate the filter cleanliness sensor.

In this embodiment, when there is an abnormality in the first light emitting component 11, the first light emitting component 11 may be replaced by the second light emitting component 12 to perform the detection of the screen cleanliness or the calibration of the screen cleanliness sensor. It should be noted that, during the detection or calibration process, whether the filter is installed or not can be determined according to whether the second light receiving component 22 can receive the reflected light of the second detection light. Specifically, the second light emitting component 12, the second light receiving component 22, and the first light receiving component 21 constitute a screen cleanliness sensor as in the fourth embodiment, the fifth embodiment, or the sixth embodiment, and the operation thereof The process is as described above and will not be described here. By providing the second light emitting component 12, not only whether the first light emitting component 11 is abnormal or not, but also when the first light emitting component 11 is abnormal, the second light emitting component 12 is used as a standby light source to maintain the filter. The normal operation of the net cleanliness sensor extends the life of the filter cleanliness sensor.

In the ninth embodiment of the present application, as shown in FIG. 13, after the step of determining that the first light emitting component 11 is normal, the screen cleanliness detecting method further includes the following steps:

Step S710', when the filter is in the installed state, acquiring a calibration instruction;

Step S720', controlling the first light emitting component 11 to emit the first detecting light with the first standard emitting light intensity, the second light emitting component 12 is turned off, and acquiring the second light intensity signal received by the second light receiving component 22;

Step S730', comparing the intensity of the second light intensity signal with the sixth preset intensity;

Step S740', when the intensity of the second light intensity signal is greater than or equal to the sixth preset intensity, updating the first standard received light intensity to the intensity of the current second light intensity signal;

Step S750 ′, when the intensity of the second light intensity signal is less than the sixth preset intensity, adjusting the intensity of the first detection light emitted by the first light emitting component 11 and acquiring the second light intensity received by the second light receiving component 22 signal;

Step S760 ′, when the difference between the intensity of the seventh preset intensity minus the second light intensity signal is greater than or equal to zero and less than the second preset difference, updating the first standard emission light intensity to the current first detection light Intensity, and updating the first standard received light intensity to the intensity of the current second light intensity signal;

Step S770', controlling the first light emitting component 11 to be turned off, and the second light emitting component 12 emitting the second detecting light;

Step S780', adjusting the intensity of the second detection light emitted by the second light emitting component 12, and acquiring the first light intensity signal received by the first light receiving component 21;

Step S790 ′, when the absolute value of the difference between the intensity of the first standard received light intensity and the second light intensity signal is less than or equal to the third preset difference, updating the second standard emitted light intensity to the current second detected light Intensity, and the second standard received light intensity is updated to the intensity of the current first light intensity signal.

In this embodiment, in order to enable the second light emitting component 12 to be used in time when the first light emitting component 11 is abnormal, no additional calibration is needed to improve the detection efficiency. The second light emitting component 12 and the first light receiving component 21 are calibrated each time the first light emitting component 11 and the second light receiving component 22 are calibrated. Specifically, when the filter 30 is in the installed state, the first light emitting component 11 is calibrated in the manner of the sixth embodiment, and details are not described herein again. The sixth preset intensity is equivalent to the second preset intensity in the sixth embodiment, and the seventh preset intensity is equivalent to the third preset intensity in the sixth embodiment, and the second preset difference is equivalent to the sixth The first preset difference in the embodiment is only based on different sensors, and there may be a change in a specific value. Further, the first light emitting component 11 is controlled to be turned off, and the second light emitting component 12 emits the second detecting light, and the second light emitting component 12 is emitted by adjusting the first standard receiving light intensity of the second light receiving component 22 as a reference. The intensity of the second detection light is such that the second standard received light intensity of the first light receiving component 21 is close to the first standard received light intensity, and the second standard emitted light intensity is updated with the current intensity of the second detected light, The intensity of the current first light intensity signal updates the second standard received light intensity. In the present embodiment, since the first light emitting component 11, the second light receiving component 22, the second light emitting component 12, and the first light receiving component 21 are jointly calibrated for each calibration, if the first light is emitted The component 11 fails and can be replaced immediately by the second light emitting component 12 without additional calibration, improving the efficiency of the detection.

The present application also provides a screen cleanliness sensor. In an embodiment of the present application, as shown in FIG. 1 and FIG. 2, the screen cleanliness sensor includes a first light emitting component 11 and a first light receiving component 21, Wherein, the first light emitting component 11 is arranged to emit the first detecting light; the first light receiving component 21 and the first light emitting component 11 are disposed on the same side of the mounting position of the screen 30, and the first light receiving component 21 is arranged to receive the light. The first detection light reflected by the filter.

Further, as shown in FIG. 1 and FIG. 2, the screen cleanliness sensor further includes a second light receiving component 22 corresponding to the first light emitting component 11 at two sides of the mounting position of the screen 30, and the second light receiving component. 22 is arranged to receive the first detection light transmitted through the screen.

When the filter screen is in the installed state, a portion of the first detection light emitted by the first light emitting component 11 is transmitted through the filter screen, and is received by the second light receiving component 22, according to the second light intensity signal received by the second light receiving component 22. The intensity of the screen 30 can be obtained. Specifically, when the screen 30 is in a clean state, the intensity of the second light intensity signal received by the second light receiving unit 22 is the largest, and the screen 30 is gradually dirty. Blocked, the intensity of the second light intensity signal gradually weakens.

In another embodiment of the present application, as shown in FIG. 9 and FIG. 10, the screen cleanliness sensor further includes a second light emitting component 12, and two of the first light receiving components 21 corresponding to the mounting position of the screen 30. Side, the second light emitting component 12 is configured to emit second detecting light; the first light receiving component 21 is further configured to receive the second detecting light transmitted through the screen; the second light receiving component 22 is further configured to receive the screen reflection The second detection light.

When the intensity of the first light intensity signal received by the first light receiving component 21 is small, one may not have the filter 30 installed. Another possibility is that the first light emitting component 11 is faulty and the first detecting light cannot be normally emitted. In the present embodiment, by providing the second light emitting unit 12, the above two cases can be effectively distinguished. At the same time, the second light emitting component 12 can also function as a backup light source when the first light emitting component 11 is abnormal, so as to ensure the normal operation of the filter cleanliness sensor and prolong its service life.

The present application also provides an air treatment apparatus including a screen cleanliness sensor, a memory, a processor, and a screen cleanliness detection program stored on the memory and operable on the processor, wherein the memory and the processor It can be integrated with the filter cleansing sensor, or it can be separately installed in the air handling equipment and electrically connected to the filter cleanliness sensor. The specific structure of the filter cleansing sensor is referred to the above embodiment. Since the air handling device adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are not Repeat them one by one.

The processor calls the filter cleanliness test stored in memory and does the following:

Controlling the first light emitting component to emit the first detecting light, and acquiring the first light intensity signal received by the first light receiving component;

Comparing the intensity of the first light intensity signal with the first preset intensity;

When the intensity of the first light intensity signal is greater than or equal to the first predetermined intensity, it is determined that the filter is in an installed state.

The processor calls the filter cleanliness detection program stored in the memory, and the operations of comparing the intensity of the first light intensity signal with the first preset intensity include:

Comparing the intensity of the first light intensity signal with the first preset intensity according to a preset time interval;

Determining that the intensity of the first light intensity signal is less than the first preset intensity when the intensity of the first first intensity signal is less than the first preset intensity;

Determining that the intensity of the first light intensity signal is greater than or equal to the first preset intensity when the intensity of the first predetermined intensity signal of the second predetermined number of times is greater than or equal to the first preset intensity;

Otherwise, after accumulating the preset duration, the steps of comparing the intensity of the first light intensity signal with the first preset intensity according to the preset time interval are returned.

The processor calls the filter cleanliness detection program stored in the memory, the filter cleansing sensor further includes a second light receiving component, and the second light receiving component and the first light emitting component are respectively disposed on two sides of the filter installation position. The second light receiving component is configured to receive the first detection light transmitted through the filter;

After determining that the filter is in the installed state, you also do the following:

Obtaining a cleanliness value of the filter or calibrating the filter cleanliness sensor according to the first detection light emitted by the first light emitting component and the second light intensity signal received by the second light receiving component.

The processor calls a filter cleanliness detection program stored in the memory, when the filter is in the installed state, according to the first detection light emitted by the first light emitting component and the second light intensity signal received by the second light receiving component, The operations for obtaining the cleanliness value of the filter include:

Controlling the first light emitting component to emit the first detecting light with the first standard emitting light intensity, and acquiring the second light intensity signal received by the second light receiving component;

Calculating a ratio of the intensity of the second light intensity signal to the first standard received light intensity, recorded as the cleanliness value of the filter;

The first standard received light intensity is the intensity of the second light intensity signal received by the second light receiving component when the first light emitting component emits the first detecting light with the first standard emitted light intensity when the filter is clean.

The processor calls a filter cleanliness detection program stored in the memory, when the filter is in the installed state, according to the first detection light emitted by the first light emitting component and the second light intensity signal received by the second light receiving component, The operation of calibrating the filter cleanliness sensor includes:

Obtain calibration instructions;

Comparing the intensity of the second light intensity signal with the second preset intensity;

When the intensity of the second light intensity signal is greater than or equal to the second predetermined intensity, updating the first standard received light intensity to the intensity of the current second light intensity signal;

Adjusting the intensity of the first detection light emitted by the first light emitting component and acquiring the second light intensity signal received by the second light receiving component when the intensity of the second light intensity signal is less than the second predetermined intensity;

When the difference between the intensity of the third preset intensity minus the second light intensity signal is greater than or equal to zero and less than the first preset difference, updating the first standard emission intensity to the intensity of the current first detection light, and The first standard received light intensity is updated to the intensity of the current second light intensity signal.

The filter cleanliness sensor further includes a second light emitting component, the second light emitting component and the first light receiving component are correspondingly disposed on two sides of the filter installation position, and the second light emitting component is configured to emit the second detecting light, the first The light receiving component is further configured to receive the second detection light transmitted through the filter, and the second light receiving component is further configured to receive the second detection light reflected by the filter;

The processor calls the filter cleanliness check program stored in the memory and also performs the following operations

Controlling the first light emitting component to emit the first detecting light, the second light emitting component is turned off, and acquiring the first light intensity signal received by the first light receiving component;

Comparing the intensity of the first light intensity signal with the fourth predetermined intensity;

When the intensity of the first light intensity signal is greater than or equal to the fourth preset intensity, determining that the filter screen is in an installed state, and the first light emitting component is normal;

When the intensity of the first light intensity signal is less than the fourth predetermined intensity, controlling the first light emitting component to be turned off, the second light emitting component to emit the second detecting light, and acquiring the second light intensity signal received by the second light receiving component;

Comparing the intensity of the second light intensity signal with the fifth preset intensity;

When the intensity of the second light intensity signal is less than the fifth preset intensity, determining that the filter screen is in an unmounted state;

The processor calls the filter cleanliness detection program stored in the memory, and after determining the abnormal operation of the first light emitting component, the following operations are also performed:

When the filter screen is in the installed state, the cleanliness value of the filter or the calibration filter cleanliness sensor is obtained according to the second detection light emitted by the second light emitting component and the first light intensity signal received by the first light receiving component.

The processor calls the filter cleanliness detection program stored in the memory, and after determining the normal operation of the first light emitting component, the following operations are also performed:

Obtain a calibration command when the filter is in the installed state;

Controlling the first light emitting component to emit the first detecting light by the first standard emitting light intensity, the second light emitting component is turned off, and acquiring the second light intensity signal received by the second light receiving component;

Comparing the intensity of the second light intensity signal with the sixth preset intensity;

When the intensity of the second light intensity signal is less than the sixth predetermined intensity, adjusting the intensity of the first detection light emitted by the first light emitting component, and acquiring the second light intensity signal received by the second light receiving component;

When the difference between the intensity of the seventh preset intensity minus the second light intensity signal is greater than or equal to zero and less than the second preset difference, the first standard emitted light intensity is updated to the intensity of the current first detected light, and The first standard received light intensity is updated to the intensity of the current second light intensity signal;

Controlling the first light emitting component to be turned off, and the second light emitting component emitting the second detecting light;

Adjusting the intensity of the second detection light emitted by the second light emitting component, and acquiring the first light intensity signal received by the first light receiving component;

When the absolute value of the difference between the intensity of the first standard received light intensity and the second light intensity signal is less than or equal to the third preset difference, updating the second standard emitted light intensity to the intensity of the current second detected light, and The second standard received light intensity is updated to the intensity of the current first light intensity signal.

The processor calls the filter cleanliness check program stored in the memory and also performs the following operations:

A first prompt signal is generated when it is determined that the screen is in an unmounted state; and/or a second prompt signal is generated when it is determined that the screen is in an installed state.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the patents of the present application, and the equivalent structural transformation, or direct/indirect use, of the present application and the contents of the drawings is used in the present invention. All other related technical fields are included in the patent protection scope of the present application.

Claims

A screen cleanliness detecting method, wherein the screen cleansing sensor comprises a first light emitting component and a first light receiving component, wherein the first light emitting component and the first light receiving component are disposed at a filter mounting position On the same side, the first light emitting component is configured to emit first detecting light, and the first light receiving component is configured to receive first detecting light reflected by the filter;

The filter cleanliness detection method includes the following steps:

Controlling the first light emitting component to emit first detecting light, and acquiring a first light intensity signal received by the first light receiving component;

Comparing the intensity of the first light intensity signal with a first preset intensity;

When the intensity of the first light intensity signal is less than the first preset intensity, determining that the filter screen is in an unmounted state;

When the intensity of the first light intensity signal is greater than or equal to the first preset intensity, it is determined that the screen is in an installed state.
The screen cleanliness detecting method according to claim 1, wherein the screen cleanliness sensor further comprises the following steps:

A first prompt signal is generated when it is determined that the screen is in an unmounted state; and/or a second prompt signal is generated when it is determined that the screen is in an installed state.
The screen cleanliness detecting method according to claim 1, wherein the step of comparing the intensity of the first light intensity signal with the first predetermined intensity comprises:

Comparing the intensity of the first light intensity signal and the first preset intensity according to a preset time interval;

Determining that the intensity of the first light intensity signal is less than the first preset intensity when the intensity of the first light intensity signal of the first predetermined number of times is less than the first preset intensity;

Determining that the intensity of the first light intensity signal is greater than or equal to the first preset intensity when the intensity of the first light intensity signal is greater than or equal to the first preset intensity;

Otherwise, after accumulating the preset duration, returning to the step of comparing the intensity of the first light intensity signal with the first preset intensity according to a preset time interval.
The screen cleanliness detecting method according to claim 3, wherein the screen cleanliness sensor further comprises the following steps:

A first prompt signal is generated when it is determined that the screen is in an unmounted state; and/or a second prompt signal is generated when it is determined that the screen is in an installed state.
The screen cleanliness detecting method according to claim 1, wherein the screen cleanliness sensor further comprises a second light receiving component, and the second light receiving component and the first light emitting component are correspondingly disposed in the On both sides of the filter installation position, the second light receiving component is configured to receive the first detection light transmitted through the filter;

After the step of determining that the screen is in an installed state, the screen cleanliness detecting method further includes the following steps:

Acquiring the cleanliness value of the filter or calibrating the filter cleanliness sensor according to the first detection light emitted by the first light emitting component and the second light intensity signal received by the second light receiving component.
The screen cleanliness detecting method according to claim 5, wherein the screen cleanliness sensor further comprises the following steps:

A first prompt signal is generated when it is determined that the screen is in an unmounted state; and/or a second prompt signal is generated when it is determined that the screen is in an installed state.
The screen cleanliness detecting method according to claim 5, wherein when the screen is in an installed state, receiving according to the first detecting light emitted by the first light emitting unit and the second light receiving unit The second light intensity signal, the step of obtaining the cleanliness value of the filter screen includes:

Controlling the first light emitting component to emit the first detecting light at a first standard emission intensity, and acquiring a second light intensity signal received by the second light receiving component;

Calculating a ratio of the intensity of the second light intensity signal to the first standard received light intensity, which is recorded as the cleanliness value of the filter;

Wherein the first standard receiving light intensity is when the first light emitting component emits the first detecting light by using the first standard emission light intensity when the filter screen is clean, the second light receiving component receives the first The intensity of the two light intensity signals.
The screen cleanliness detecting method according to claim 7, wherein the screen cleanliness sensor further comprises the following steps:

A first prompt signal is generated when it is determined that the screen is in an unmounted state; and/or a second prompt signal is generated when it is determined that the screen is in an installed state.
The screen cleanliness detecting method according to claim 5, wherein when the screen is in an installed state, receiving according to the first detecting light emitted by the first light emitting unit and the second light receiving unit The second light intensity signal, the steps of calibrating the filter cleanliness sensor include:

Obtain calibration instructions;

Controlling the first light emitting component to emit the first detecting light at a first standard emission intensity, and acquiring a second light intensity signal received by the second light receiving component;

Comparing the intensity of the second light intensity signal with a second preset intensity;

When the intensity of the second light intensity signal is greater than or equal to the second preset intensity, updating the first standard received light intensity to the intensity of the current second light intensity signal;

Adjusting an intensity of the first detection light emitted by the first light emitting component and acquiring a second light intensity received by the second light receiving component when the intensity of the second light intensity signal is less than a second predetermined intensity signal;

When the difference between the third preset intensity minus the intensity of the second light intensity signal is greater than or equal to zero and less than the first preset difference, updating the first standard emission intensity to the current first detection light intensity, And updating the first standard received light intensity to the intensity of the current second light intensity signal.
The screen cleanliness detecting method according to claim 9, wherein the screen cleanliness sensor further comprises the following steps:

A first prompt signal is generated when it is determined that the screen is in an unmounted state; and/or a second prompt signal is generated when it is determined that the screen is in an installed state.
The screen cleanliness detecting method according to claim 5, wherein the screen cleanliness sensor further comprises a second light emitting component, and the second light emitting component and the first light receiving component are correspondingly disposed in the On both sides of the filter installation position, the second light emitting component is configured to emit second detection light, and the first light receiving component is further configured to receive second detection light transmitted through the filter, the The two light receiving components are further configured to receive the second detection light reflected by the filter;

The filter cleanliness detection method includes the following steps:

Controlling the first light emitting component to emit first detecting light, the second light emitting component is turned off, and acquiring a first light intensity signal received by the first light receiving component;

Comparing the intensity of the first light intensity signal with a fourth preset intensity;

When the intensity of the first light intensity signal is greater than or equal to the fourth predetermined intensity, determining that the screen is in an installed state, and the first light emitting component is normal;

When the intensity of the first light intensity signal is less than a fourth predetermined intensity, controlling the first light emitting component to be turned off, the second light emitting component emitting second detecting light, and acquiring the second light receiving component The received second light intensity signal;

Comparing the intensity of the second light intensity signal with a fifth preset intensity;

When the intensity of the second light intensity signal is less than the fifth preset intensity, determining that the screen is in an unmounted state;

When the intensity of the second light intensity signal is greater than or equal to the fifth predetermined intensity, it is determined that the screen is in an installed state, and the first light emitting component is abnormal.
The screen cleanliness detecting method according to claim 11, wherein the screen cleanliness sensor further comprises the following steps:

A first prompt signal is generated when it is determined that the screen is in an unmounted state; and/or a second prompt signal is generated when it is determined that the screen is in an installed state.
The screen cleanliness detecting method according to claim 11, wherein after the step of determining that the first light emitting component is abnormal, the screen cleanliness detecting method further comprises the following steps:

Obtaining a cleanliness value of the filter according to the second detection light emitted by the second light emitting component and the first light intensity signal received by the first light receiving component when the filter is in an installed state Or calibrate the filter cleanliness sensor.
The screen cleanliness detecting method according to claim 13, wherein the screen cleanliness sensor further comprises the following steps:

A first prompt signal is generated when it is determined that the screen is in an unmounted state; and/or a second prompt signal is generated when it is determined that the screen is in an installed state.
The screen cleanliness detecting method according to claim 11, wherein after the step of determining that the first light emitting unit is normal, the screen cleanliness detecting method further comprises the following steps:

Obtaining a calibration command when the filter is in an installed state;

Controlling the first light emitting component to emit first detecting light at a first standard emission intensity, the second light emitting component is turned off, and acquiring a second light intensity signal received by the second light receiving component;

Comparing the intensity of the second light intensity signal with a sixth preset intensity;

When the intensity of the second light intensity signal is greater than or equal to the sixth preset intensity, updating the first standard received light intensity to the intensity of the current second light intensity signal;

Adjusting an intensity of the first detection light emitted by the first light emitting component and acquiring a second light intensity received by the second light receiving component when the intensity of the second light intensity signal is less than a sixth predetermined intensity signal;

When the difference between the seventh preset intensity minus the intensity of the second light intensity signal is greater than or equal to zero and less than the second preset difference, updating the first standard emitted light intensity to the current first detected light intensity, And updating the first standard received light intensity to the intensity of the current second light intensity signal;

Controlling the first light emitting component to be turned off, and the second light emitting component emitting second detecting light;

Adjusting an intensity of the second detection light emitted by the second light emitting component, and acquiring a first light intensity signal received by the first light receiving component;

When the absolute value of the difference between the first standard received light intensity and the intensity of the second light intensity signal is less than or equal to the third preset difference, the second standard emitted light intensity is updated to the current second detected light intensity, And updating the second standard received light intensity to the intensity of the current first light intensity signal.
The screen cleanliness detecting method according to claim 15, wherein the screen cleanliness sensor further comprises the following steps:

A first prompt signal is generated when it is determined that the screen is in an unmounted state; and/or a second prompt signal is generated when it is determined that the screen is in an installed state.
A filter cleanliness sensor, wherein the filter cleanliness sensor comprises:

a first light emitting component configured to emit first detecting light;

The first light receiving component is disposed on a same side of the screen mounting position as the first light emitting component, and the first light receiving component is configured to receive the first detection light reflected by the filter.
The screen cleanliness sensor of claim 17, wherein the screen cleanliness sensor further comprises:

The second light receiving component is disposed on both sides of the filter installation position corresponding to the first light emitting component, and the second light receiving component is configured to receive the first detection light transmitted through the filter.
The screen cleanliness sensor of claim 18, wherein the screen cleanliness sensor further comprises:

a second light emitting component is disposed on both sides of the filter installation position corresponding to the first light receiving component, and the second light emitting component is configured to emit second detecting light;

The first light receiving component is further configured to receive second detection light transmitted through the filter screen;

The second light receiving component is further configured to receive second detection light reflected by the screen.
An air treatment apparatus, wherein the air treatment apparatus includes a screen cleanliness sensor, a memory, a processor, and a screen cleanliness detection program stored on the memory and operable on the processor, The screen cleanliness sensor includes a first light emitting component and a first light receiving component, the first light emitting component being configured to emit first detecting light; the first light receiving component and the first light emitting component being disposed at The same side of the screen mounting position, the first light receiving component is configured to receive first detection light reflected by the screen; and the screen cleanliness detection program is implemented by the processor to achieve filter cleanliness a step of detecting a method, the screen cleanliness detecting method comprising the steps of: controlling the first light emitting component to emit first detecting light, and acquiring a first light intensity signal received by the first light receiving component; The intensity of the first light intensity signal and the first preset intensity; when the intensity of the first light intensity signal is less than the first preset intensity, determining that the screen is in an unmounted state; The intensity of a light intensity signal is equal to or greater than a first predetermined intensity, the filter is determined in a mounted state.