Method for self-cleaning of a filter screen, control device, dehumidifier, readable storage medium

Abstract

The application provides a method for self-cleaning of a filter screen, a control device, a dehumidifier and a readable storage medium, and the method comprises the following steps: the dehumidifier is provided with a spraying device, the method comprises the following steps: when the dehumidifier is in a dehumidifying operation, the pressure values of the air inlet and the air outlet of the dehumidifier are obtained; the difference between the pressure values of the air inlet and the air outlet is calculated; according to the difference, the dirty and clogged condition of the filter screen is judged; in the case that the difference is greater than a first threshold value, the dehumidifier is controlled to exit the dehumidifying mode and enter a self-cleaning mode; according to the dirty and clogged condition, the working time length of the self-cleaning mode is adjusted; the self-cleaning mode comprises the following steps: the rotating speed of the fan is adjusted; and / or the blowing direction of the fan is adjusted; and / or the spraying device sprays water to the filter screen. The application solves the technical problem of low service life of the existing filter screen, and achieves the technical effect of prolonging the service life of the filter screen.

Description

Technical Field

[0001] This invention relates to the field of dehumidifier technology, and more specifically, to a method, control device, dehumidifier, and readable storage medium for self-cleaning of dehumidifier filters. Background Technology

[0002] After prolonged use, a large amount of dust will accumulate on the filter of a dehumidifier, which not only affects the airflow but also easily breeds bacteria. If not cleaned in time, the dust and bacteria will enter the air through the air outlet when the dehumidifier is in use, affecting the user's health.

[0003] The problem is that users often only clean or replace the filter when it is already clogged and affecting normal use, which is not conducive to extending the lifespan of the filter. Summary of the Invention

[0004] This invention solves the technical problem of the short service life of existing filters and achieves the technical effect of extending the service life of filters.

[0005] To address the aforementioned problems, this invention provides a method for self-cleaning a dehumidifier filter. The dehumidifier is equipped with a spray device and a fan. The method includes: acquiring the pressure values ​​at the air inlet and outlet of the dehumidifier while it is dehumidifying; calculating the difference between the pressure values ​​at the air inlet and outlet; determining the degree of filter clogging based on the difference; controlling the dehumidifier to exit the dehumidification mode and automatically enter the self-cleaning mode if the difference exceeds a first threshold; adjusting the operating duration of the self-cleaning mode according to the degree of clogging; the self-cleaning mode includes: adjusting the fan speed; and / or adjusting the fan's airflow direction; and / or spraying water onto the filter using the spray device.

[0006] Compared to existing technologies, this technical solution achieves the following advantages: When the dehumidifier is operating in dehumidification mode, it acquires real-time pressure values ​​at the air inlet and outlet. By comparing the inlet and outlet pressures and calculating the pressure difference, the filter's clogging level can be determined. When the pressure difference between the inlet and outlet exceeds a certain value, automatic cleaning is initiated, eliminating the need for regular manual inspection and cleaning of the filter. This is more user-friendly, and timely filter cleaning extends its lifespan and improves airflow efficiency and air quality. In self-cleaning mode, the fan blows air towards the filter, causing dust to be adsorbed by the heat exchanger. A spray system can also spray water onto the filter for further cleaning. Adjusting the fan speed and airflow direction can further enhance the filter's dust removal efficiency.

[0007] In one embodiment of the present invention, determining the degree of clogging of the filter screen based on the difference includes: if the difference is greater than a first threshold and less than a second threshold, the filter screen is classified as level one clogging; if the difference is greater than or equal to the second threshold and less than a third threshold, the filter screen is classified as level two clogging; and if the difference is greater than or equal to the third threshold and less than a fourth threshold, the filter screen is classified as level three clogging.

[0008] Compared with existing technologies, the technical effect achieved by this solution is as follows: the degree of dirt clogging of the filter screen is classified according to the difference, so that the filter screen can be cleaned adaptively, resulting in better cleaning effect.

[0009] In one embodiment of the present invention, when the filter screen is clogged to the first stage, the fan speed is adjusted to a first speed and the fan blows in an oscillating manner; when the filter screen is clogged to the second stage, the fan speed is adjusted to a second speed and the fan blows in an oscillating manner; when the filter screen is clogged to the third stage, the fan speed is adjusted to a third speed and the fan blows directly, and the spray device sprays water onto the filter screen; the first speed is less than the second speed, and the second speed is less than the third speed.

[0010] Compared to existing technologies, the technical effects achieved by this solution are as follows: When the filter is only partially clogged (level 1), the fan oscillates at its highest speed towards the filter, blowing air to all corners to dislodge dust. When the filter is partially clogged (level 2), the fan oscillates at its highest speed, resulting in even stronger airflow and better dust removal. When the filter is partially clogged (level 3), the fan blows directly towards the filter at its highest speed, providing even stronger and more concentrated airflow, while a spray system simultaneously sprays water onto the filter. This direct airflow ensures water droplets reach the filter as much as possible, attracting and washing away dust. Since air quality varies under different usage environments, the degree of filter clogging varies accordingly. This tiered control allows for more efficient and convenient filter cleaning, while also being more energy-efficient.

[0011] In one embodiment of the present invention, the working time of the self-cleaning mode is adjusted according to the degree of clogging, including: when the filter is clogged to the first level, the working time of the self-cleaning mode is a first working time; when the filter is clogged to the second level, the working time of the self-cleaning mode is a second working time; when the filter is clogged to the third level, the working time of the self-cleaning mode is a third working time; the first working time is less than the second working time, and the second working time is less than the third working time.

[0012] Compared with existing technologies, the technical effects achieved by this solution are as follows: for different levels of clogging, the self-cleaning mode can be set with different working times; the more severe the clogging of the filter, the longer the working time, in order to improve the cleaning effect of the filter and save energy.

[0013] In one embodiment of the present invention, the method further includes: when the working time reaches a preset working time, the dehumidifier automatically exits the self-cleaning mode.

[0014] Compared with existing technologies, the technical effects achieved by this solution are as follows: after the preset working time is reached, the dehumidifier can automatically switch working modes without user intervention, demonstrating a high degree of intelligence.

[0015] In one embodiment of the present invention, the method further includes: after the dehumidifier automatically exits the self-cleaning mode, it re-enters the dehumidification mode to obtain the air quality at the air outlet; if the air quality reaches the preset air quality, the dehumidifier continues to operate in the dehumidification mode; if the air quality does not reach the preset air quality, the dehumidifier re-enters the self-cleaning mode.

[0016] Compared to existing technologies, the technical effects achieved by this solution are as follows: After the dehumidifier automatically exits the self-cleaning mode, it automatically enters the dehumidification mode without user intervention. It detects the air quality at the outlet to verify the filter's cleaning effect. If the air quality reaches the preset level, the dehumidifier continues operating in dehumidification mode. If the air quality does not reach the preset level, the dehumidifier automatically enters the self-cleaning mode to clean the filter again, ensuring optimal air quality at the outlet and preventing any impact on the user's health. Preferably, after self-cleaning, the dehumidifier exits the self-cleaning mode and automatically enters the dehumidification mode. If the air quality still does not reach the preset level, the user is prompted to replace the filter; this prompt may be a buzzer.

[0017] In one embodiment of the present invention, the dehumidifier includes a cleaning component, and the method further includes: when the filter screen is three-stage clogged, the cleaning component moves toward the filter screen to clean the dust on the filter screen, and after cleaning, the spraying device sprays water onto the filter screen.

[0018] Compared with existing technologies, the technical effects achieved by this technical solution are as follows: the fan blows the dust on the filter screen onto the heat exchanger. The filter screen may still have dust adsorbed on it. In order to remove the dust more thoroughly, the cleaning component cleans the dust on the filter screen. After cleaning, the spray device sprays water onto the filter screen for further cleaning.

[0019] This invention also provides a control device for self-cleaning a dehumidifier filter, and a control method applicable to any of the above embodiments. The control device includes: an acquisition module for acquiring the pressure values ​​of the air inlet and outlet of the dehumidifier during dehumidification operation; a calculation module for calculating the difference between the pressure values ​​of the air inlet and outlet; a judgment module for judging the degree of filter clogging based on the difference; a control module for controlling the dehumidifier to exit the dehumidification mode and automatically enter the self-cleaning mode when the difference is greater than a first threshold; and a processing module for adjusting the working duration of the self-cleaning mode according to the degree of clogging.

[0020] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: when the control device of the dehumidifier is used to execute the control method in the above example, the control device has all the technical features and all the beneficial effects of the control method in the above embodiment, which will not be elaborated here.

[0021] This invention also provides a dehumidifier, which includes a filter, a fan, a heat exchanger, a dust collection device, a water tank, a spray device, a cleaning assembly, and a drive device. The dehumidifier's air inlet and outlet are respectively equipped with pressure measuring devices for measuring the pressure values ​​at the air inlet and outlet. The fan blows dust from the filter to the heat exchanger. The dust collection device collects dust adsorbed on the heat exchanger and dust from the filter. The spray device is connected to the water tank so that it sprays water from the tank onto the filter. The cleaning assembly cleans the dust from the filter. The drive device moves the cleaning assembly and the dust collection device. The dehumidifier also includes a control device as described above, which is electrically connected to the pressure measuring device, the fan, the spray device, and the drive device.

[0022] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: After implementing the control method in the above example, the dehumidifier has all the technical features and all the beneficial effects of the control method in the above embodiment, which will not be elaborated here.

[0023] The present invention also provides a readable storage medium on which a program or instructions are stored, and a method for implementing any of the above-described instances when the program or instructions are executed by a processor.

[0024] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: After the readable storage medium implements the control method in the above example, the readable storage medium has all the technical features and all the beneficial effects of the control method in the above embodiment, which will not be elaborated here. Attached Figure Description

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a flowchart illustrating a method for self-cleaning a dehumidifier filter, provided in an embodiment of the present invention. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below.

[0028] Example 1:

[0029] This embodiment provides a method for self-cleaning the filter of a dehumidifier. The dehumidifier is equipped with a spray device and a fan. See [link to documentation]. Figure 1 , Figure 1 This is a flowchart illustrating the method, which includes:

[0030] S10: When the dehumidifier is in dehumidification operation, obtain the pressure values ​​of the air inlet and outlet of the dehumidifier;

[0031] S20: Calculate the pressure difference between the air inlet and the air outlet;

[0032] S30: Determine the degree of clogging of the filter screen based on the difference;

[0033] S40: If the difference is greater than the first threshold, control the dehumidifier to exit the dehumidification mode and automatically enter the self-cleaning mode;

[0034] S50: Adjust the working time of the self-cleaning mode according to the degree of dirt and clogging;

[0035] Self-cleaning modes include: adjusting fan speed; and / or

[0036] Adjust the fan's airflow direction; and / or

[0037] The spraying device sprays water onto the filter screen.

[0038] Specifically, the dehumidifier is equipped with pressure measuring devices at both the air inlet and outlet to measure the pressure values ​​at these points. When the dehumidifier is running in dehumidification mode, it acquires the pressure values ​​at the inlet and outlet in real time. By comparing the pressure at the inlet and outlet and calculating the pressure difference, the level of filter clogging can be determined. When the pressure difference between the inlet and outlet exceeds a certain value, automatic cleaning is initiated, eliminating the need for regular manual inspection and cleaning of the filter. This is more user-friendly, and timely filter cleaning extends its lifespan and improves airflow efficiency and air quality. In self-cleaning mode, the fan blows air towards the filter, causing dust to be adsorbed by the heat exchanger. A spray system can also spray water onto the filter for further cleaning. Adjusting the fan speed and airflow direction can improve the filter's dust removal efficiency.

[0039] Furthermore, based on the difference, the degree of clogging of the filter is determined, including: if the difference is greater than the first threshold and less than the second threshold, the filter is classified as Level 1 clogging; if the difference is greater than or equal to the second threshold and less than the third threshold, the filter is classified as Level 2 clogging; and if the difference is greater than or equal to the third threshold and less than the fourth threshold, the filter is classified as Level 3 clogging.

[0040] For example, the first threshold is 800 Pa, the second threshold is 1000 Pa, the third threshold is 1200 Pa, and the fourth threshold is 1500 Pa.

[0041] Specifically, the degree of dirt and clogging of the filter screen is classified according to the difference, so that the filter screen can be cleaned accordingly for better cleaning results.

[0042] Furthermore, when the filter is clogged to the first stage, the fan speed is adjusted to the first speed, and the fan is oscillating and blowing air; when the filter is clogged to the second stage, the fan speed is adjusted to the second speed, and the fan is oscillating and blowing air; when the filter is clogged to the third stage, the fan speed is adjusted to the third speed, and the fan is blowing air directly, with the spray device spraying water onto the filter; the first speed is lower than the second speed, and the second speed is lower than the third speed.

[0043] For example, the first speed is 1000 rpm, the second speed is 2000 rpm, and the third speed is 3000 rpm.

[0044] Specifically, when the filter is only partially clogged (level 1), the fan operates at its fastest speed, oscillating towards the filter to blow air to all corners and dislodge dust. For level 2 clogging, the filter is even dirtier, so the fan operates at its fastest speed, oscillating towards the filter with even stronger airflow for better dust removal. For level 3 clogging (the dirtiest level), the fan operates at its fastest speed, blowing directly towards the filter with even stronger, more concentrated airflow, while a spray system simultaneously sprays water onto the filter. The fan and spray system can operate simultaneously, or the spray system can activate after the fan has run for a while. The direct airflow ensures that water droplets reach the filter as much as possible; the water droplets attract and remove dust with strong force, effectively cleaning the filter. Because air quality varies in different environments, the degree of filter clogging will vary. This tiered control allows for more efficient and convenient filter cleaning, while also being more energy-efficient.

[0045] Furthermore, the working time of the self-cleaning mode is adjusted according to the degree of clogging, including: when the filter is clogged to level one, the working time of the self-cleaning mode is the first working time; when the filter is clogged to level two, the working time of the self-cleaning mode is the second working time; when the filter is clogged to level three, the working time of the self-cleaning mode is the third working time; the first working time is less than the second working time, and the second working time is less than the third working time.

[0046] For example, the first task lasts 5 minutes, the second task lasts 8 minutes, and the third task lasts 10 minutes.

[0047] Specifically, the self-cleaning mode is set to different working times depending on the degree of clogging. The more severe the clogging of the filter, the longer the working time, in order to improve the cleaning effect of the filter and save energy.

[0048] Furthermore, the method also includes: when the working time reaches the preset working time, the dehumidifier automatically exits the self-cleaning mode.

[0049] Specifically, once the preset working time is reached, the dehumidifier can automatically switch working modes without user intervention, demonstrating a high degree of intelligence.

[0050] Furthermore, the method also includes: after the dehumidifier automatically exits the self-cleaning mode, it re-enters the dehumidification mode to obtain the air quality at the air outlet. If the air quality reaches the preset air quality, the dehumidifier continues to operate in the dehumidification mode. If the air quality does not reach the preset air quality, the dehumidifier re-enters the self-cleaning mode.

[0051] Specifically, after the dehumidifier automatically exits the self-cleaning mode, it automatically enters the dehumidification mode without user intervention. It detects the air quality at the outlet to verify the filter's cleaning effectiveness. If the air quality reaches the preset level, the dehumidifier continues operating in dehumidification mode. If the air quality does not reach the preset level, the dehumidifier automatically enters the self-cleaning mode to clean the filter again, ensuring optimal air quality at the outlet and preventing any impact on the user's health. After self-cleaning, the dehumidifier exits the self-cleaning mode and automatically enters the dehumidification mode. If the air quality still does not reach the preset level, the user is prompted to replace the filter; this prompt may be indicated by a buzzer.

[0052] Furthermore, the dehumidifier includes a cleaning component, and the method further includes: when the filter screen is three-stage clogged, the cleaning component moves toward the filter screen to clean the dust on the filter screen, and after cleaning, the spray device sprays water onto the filter screen.

[0053] Specifically, the fan blows the dust from the filter onto the heat exchanger. The filter may still have dust adhering to it. To remove the dust more thoroughly, a cleaning component cleans the dust from the filter. After cleaning, a spray device sprays water onto the filter for further cleaning.

[0054] Example 2:

[0055] This embodiment provides a control device for self-cleaning of a dehumidifier filter, applicable to any of the above-described examples. The control device includes:

[0056] The acquisition module is used to acquire the pressure values ​​of the air inlet and outlet of the dehumidifier when the dehumidifier is in dehumidification operation;

[0057] The calculation module is used to calculate the pressure difference between the air inlet and the air outlet;

[0058] The judgment module is used to determine the degree of dirt and clogging of the filter screen based on the difference.

[0059] The control module is used to control the dehumidifier to exit the dehumidification mode and automatically enter the self-cleaning mode when the difference is greater than the first threshold.

[0060] The processing module is used to adjust the working time of the self-cleaning mode according to the degree of dirt and clogging.

[0061] Preferably, when the control device of the dehumidifier is used to execute the control method in the above examples, the control device has all the technical features and all the beneficial effects of the control method in the above embodiments, which will not be described in detail here.

[0062] Example 3:

[0063] This embodiment provides a dehumidifier, which includes a filter, a fan, a heat exchanger, a dust collection device, a water tank, a spray device, a cleaning assembly, and a drive device. Pressure measuring devices are installed at the air inlet and outlet of the dehumidifier to measure the pressure values ​​at the air inlet and outlet. The fan blows dust from the filter to the heat exchanger. The dust collection device collects dust adsorbed on the heat exchanger and dust from the filter. The spray device is connected to the water tank so that it sprays water from the tank onto the filter. The cleaning assembly cleans the dust from the filter. The drive device moves the cleaning assembly and the dust collection device. The dehumidifier also includes a control device as described above, which is electrically connected to the pressure measuring device, the fan, the spray device, and the drive device.

[0064] Preferably, after implementing the control method in the above examples, the dehumidifier possesses all the technical features and beneficial effects of the control method in the above embodiments, which will not be elaborated here.

[0065] Specifically, the filter is installed inside the dehumidifier casing near the heat exchanger, and a fan is installed on the other side of the filter. A dust collection device is installed between the filter and the heat exchanger, a cleaning assembly is installed between the filter and the heat exchanger, and a spray device is installed on top of the filter. The cleaning assembly includes brushes to clean dust from the filter and heat exchanger. The dust collection device is movable, allowing it to collect the dust swept off the filter and heat exchanger in a timely manner. When water droplets adhere to the filter, the cleaning assembly washes the filter, and the dust collection device moves to the bottom of the filter to collect the cleaned wastewater. In case of overload, the system will promptly alert the user to remove the dirt from the dust collection device; this alert may be a buzzer.

[0066] Specifically, the dehumidifier also includes an air quality detection device, which is installed at the air outlet of the dehumidifier to detect the air quality at the air outlet.

[0067] Example 4:

[0068] This embodiment provides a readable storage medium on which a program or instruction is stored, and when the program or instruction is executed by a processor, it implements the method of any of the above instances.

[0069] Preferably, after implementing the control method in the above examples, the readable storage medium possesses all the technical features and beneficial effects of the control method in the above embodiments, which will not be elaborated here.

[0070] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A method for self-cleaning a dehumidifier filter, characterized in that, The dehumidifier is equipped with a spray device and a fan, and the method includes: When the dehumidifier is in dehumidification operation, the pressure values ​​of the air inlet and air outlet of the dehumidifier are obtained; Calculate the pressure difference between the air inlet and the air outlet; Based on the difference, the degree of clogging of the filter screen is determined; If the difference is greater than the first threshold, the dehumidifier is controlled to exit the dehumidification mode and automatically enter the self-cleaning mode. Adjust the working time of the self-cleaning mode according to the degree of dirt and clogging; The self-cleaning mode includes: Adjust the fan speed; and / or Adjust the airflow direction of the fan; and / or The spraying device sprays water onto the filter screen; The determination of the filter's clogging status based on the difference includes: if the difference is greater than the first threshold and less than the second threshold, the filter is classified as having a level 1 clogging; if the difference is greater than or equal to the second threshold and less than the third threshold, the filter is classified as having a level 2 clogging; and if the difference is greater than or equal to the third threshold and less than the fourth threshold, the filter is classified as having a level 3 clogging. When the filter is clogged to the first stage, the fan speed is adjusted to a first speed, and the fan operates in an oscillating blowing mode; when the filter is clogged to the second stage, the fan speed is adjusted to a second speed, and the fan operates in an oscillating blowing mode; when the filter is clogged to the third stage, the fan speed is adjusted to a third speed, and the fan operates in a direct blowing mode, while the spray device sprays water onto the filter; the first speed is less than the second speed, and the second speed is less than the third speed.

2. The method according to claim 1, characterized in that, The step of adjusting the working time of the self-cleaning mode according to the degree of dirt blockage includes: When the filter is clogged to level one, the self-cleaning mode operates for the first operating time. When the filter is clogged in two stages, the self-cleaning mode operates for the second operating time. When the filter is clogged to level three, the self-cleaning mode operates for the third operating time. The first working time is less than the second working time, and the second working time is less than the third working time.

3. The method according to claim 1, characterized in that, The method further includes: When the preset working time is reached, the dehumidifier automatically exits the self-cleaning mode.

4. The method according to claim 3, characterized in that, The method further includes: After the dehumidifier automatically exits the self-cleaning mode, it re-enters the dehumidification mode to obtain the air quality at the air outlet. If the air quality reaches the preset air quality, the dehumidifier continues to operate in the dehumidification mode. If the air quality does not reach the preset air quality, the dehumidifier re-enters the self-cleaning mode.

5. The method according to claim 1, characterized in that, The dehumidifier includes a cleaning component, and the method further includes: When the filter screen is clogged to level three, the cleaning component moves toward the filter screen to clean the dust on the filter screen. After cleaning, the spraying device sprays water onto the filter screen.

6. A control device for self-cleaning of a dehumidifier filter, characterized in that, The control device, applied to the control method according to claims 1 to 5, comprises: The acquisition module is used to acquire the pressure values ​​of the air inlet and air outlet of the dehumidifier when the dehumidifier is running; The calculation module is used to calculate the pressure difference between the air inlet and the air outlet; The judgment module is used to determine the degree of clogging of the filter screen based on the difference. The control module is used to control the dehumidifier to exit the dehumidification mode and automatically enter the self-cleaning mode when the difference is greater than the first threshold. The processing module is used to adjust the working time of the self-cleaning mode according to the degree of dirt blockage.

7. A dehumidifier, characterized in that, The dehumidifier includes a filter, a fan, a heat exchanger, a dust collection device, a water tank, a spray device, a cleaning assembly, and a drive device; The dehumidifier is equipped with pressure measuring devices at its air inlet and air outlet, respectively, and the pressure measuring devices are used to measure the pressure values ​​at the air inlet and air outlet. The fan can blow dust from the filter screen to the heat exchanger; The dust collection device is used to collect the dust adsorbed on the heat exchanger and the dust on the filter screen; The spraying device is connected to the water tank so that the spraying device can spray water from the water tank onto the filter screen; The cleaning assembly is used to clean the dust on the filter screen; The drive device is used to drive the cleaning assembly and the dust collection device to move; The dehumidifier further includes the control device as described in claim 6, wherein the control device is electrically connected to the pressure measuring device, the fan, the spray device and the drive device.

8. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the method as described in any one of claims 1 to 5.

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