CN116499074B - Control method for reducing operation noise of air purifier and air purifier - Google Patents
Control method for reducing operation noise of air purifier and air purifier Download PDFInfo
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- CN116499074B CN116499074B CN202310776905.7A CN202310776905A CN116499074B CN 116499074 B CN116499074 B CN 116499074B CN 202310776905 A CN202310776905 A CN 202310776905A CN 116499074 B CN116499074 B CN 116499074B
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000013507 mapping Methods 0.000 claims description 54
- 230000006870 function Effects 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 238000004887 air purification Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/39—Monitoring filter performance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/64—Airborne particle content
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/66—Volatile organic compounds [VOC]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
- F24F2130/40—Noise
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The application relates to a control method for reducing operation noise of an air purifier and the air purifier, and relates to the technical field of the air purifier, wherein the control method comprises the following steps: acquiring air quality information in the operation process of the air purifier; in the current operation process, a first current value of a direct current motor of a fan of the air purifier is obtained; a first operating power of the direct current motor based on the first current value; obtaining a first decibel value of the fan based on the first operating power; obtaining a second operating power matched with the air quality information based on the air quality information; obtaining a second fraction Bei Zhi based on the second operating power; judging whether the air purifier operates in a first operation mode; if yes, comparing the first db value with the second score Bei Zhi; if the first decibel value is larger than the second decibel value, controlling the air purifier to work at the second operation power; and if the first decibel value is smaller than the second decibel value, controlling the air purifier to continuously work at the first operation power.
Description
Technical Field
The application relates to the technical field of air purifiers, in particular to a control method for reducing operation noise of an air purifier and the air purifier.
Background
An air purifier is a device for decomposing toxic and harmful gases and killing bacteria. In recent years, it has been widely popularized in the life of residents.
The air purifier uses a direct current motor to drive a fan to rotate, so that gas is sucked into a filter element in the air purifier for purification. However, a certain noise is generated when the fan works; in the case of low environmental noise requirements, a certain discomfort is caused to the user, and how to solve the technical problem is a technical difficulty that a person skilled in the art needs to overcome.
Disclosure of Invention
In order to at least partially solve the technical problems, the application provides a control method for reducing the operation noise of an air purifier and the air purifier.
In a first aspect, the present application provides a control method for reducing operation noise of an air purifier, which adopts the following technical scheme.
A control method for reducing the operation noise of an air purifier, comprising:
acquiring air quality information in the operation process of the air purifier;
in the current operation process, a first current value of the fan of the air purifier is obtained when a direct current motor of the fan operates;
obtaining a first running power of the direct current motor based on the first current value;
obtaining a first decibel value of the fan based on the first current value;
obtaining a second operation power matched with the air quality information based on the air quality information;
obtaining a second fraction Bei Zhi of the dc motor based on the second operating power;
judging whether the air purifier operates in a first operation mode; if so, comparing the first decibel value with the second score Bei Zhi;
if the first decibel value is larger than the second decibel value, controlling the direct current motor to work at the second running power;
and if the first decibel value is smaller than the second decibel value, controlling the direct current motor to continue to work with the first running power.
Optionally, controlling the dc motor to operate at the second operating power includes:
acquiring a first rotation speed value of the direct current motor when the direct current motor works according to the instruction of the second running power;
obtaining a nominal rotation speed value of the second operation power;
comparing the nominal rotation speed value with the first rotation speed value to obtain a difference value;
and when the difference value is larger than a preset value, compensating the second operation power.
Optionally, obtaining the first operating power of the dc motor based on the first current value includes:
and obtaining the first running power based on the first current value and the working voltage of the direct current motor.
Optionally, obtaining the first decibel value of the fan based on the first current value includes:
inputting the first operating power into a mapping table; the mapping table is a mapping table of the corresponding relation between the power value and the decibel value; obtaining the first decibel value based on a mapping result of the mapping table;
alternatively, the first operating power is input to a mapping function; the mapping function is a function of the corresponding relation between the power value and the decibel value; and obtaining the first decibel value based on the mapping result of the mapping table.
Optionally, obtaining a second fractional value of the dc motor based on the second operating power includes:
inputting the second operating power into a mapping table; the mapping table is a mapping table of the corresponding relation between the power value and the decibel value; obtaining the second component Bei Zhi based on a mapping result of the mapping table;
alternatively, the second operating power is input to a mapping function; the mapping function is a function of the corresponding relation between the power value and the decibel value; and obtaining the second decibel value based on the mapping result of the mapping table.
Optionally, the method further comprises:
obtaining the residual usage amount of the filter element of the air purifier;
and when the residual usage amount is lower than a preset value, sending out prompt information when the air purifier is not in the first operation mode.
Optionally, acquiring air quality information includes:
sending an acquisition instruction to a sensor of the air purifier; the acquisition instruction is used for triggering the sensor to send detection data;
and after receiving the detection data sent by the sensor, obtaining air quality information based on the detection data.
In a second aspect, the present application discloses an air purifier comprising a memory and a processor, the memory having stored thereon a computer program loaded by the processor and performing any of the methods described above.
In a third aspect, the present application discloses a computer readable storage medium storing a computer program capable of being loaded by a processor and performing any of the methods described above.
Drawings
Fig. 1 is a flowchart of a control method for reducing the operation noise of an air cleaner according to an embodiment of the present application.
Detailed Description
The application is further illustrated by the following description of the specific embodiments in conjunction with the accompanying drawings of fig. 1:
first, what needs to be described here is: in the description of the present application, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used for convenience of description only as regards orientation or positional relationship as shown in the accompanying drawings, and do not denote or imply that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application; moreover, the numerical terms such as the terms "first," "second," "third," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, a fixed connection, a releasable connection, an interference fit, a transition fit, or an integral connection; can be directly connected or indirectly connected through an intermediate medium; the specific meaning of the above terms in the present application will be understood by those skilled in the art according to the specific circumstances.
The embodiment of the application discloses a control method for reducing the operation noise of an air purifier. Referring to fig. 1, as one embodiment of a control method for reducing the operation noise of an air cleaner, a control method for reducing the operation noise of an air cleaner includes the steps of:
step 101, acquiring air quality information in the operation process of the air purifier;
specifically, the air purifier utilizes an internal fan to pump air into the machine body, and filters the air through a built-in filter element, so that the effects of filtering dust, removing peculiar smell and killing part of bacteria are achieved, and the fan can be driven by a direct current motor to operate. In the running process of the air purifier, detecting the current concentration of particulate matters and the concentration of harmful gases through an internal sensor (PM 2.5 dust sensor and formaldehyde sensor); the processor obtains air quality information based on the data sent by the sensor.
102, in the current operation process, acquiring a first current value when a direct current motor of a fan of the air purifier is operated;
specifically, during operation of the air purifier, a current value of the direct current motor of the fan of the air purifier may be read by the current sensor and recorded as a first current value. In other implementations, the current detection circuit may also be designed to enable measurement of the current value of the dc motor.
Step 103, obtaining a first running power of the direct current motor based on the first current value;
specifically, in general, the efficiency of the air purifier for purifying air is in positive correlation with the power consumed by the direct current motor of the blower, that is, the efficiency of purifying air is generally higher. The voltage of the direct current motor is constant, so that the first operating power of the direct current motor can be obtained after the first current value is obtained.
104, obtaining a first decibel value of the fan based on the first current value;
in particular, during operation of the dc motor, the current and the rotational speed are mutually influenced, and the relationship between them can be represented by a characteristic curve of the dc motor. At low speed, the direct current motor needs to overcome inertia, and at high speed, the resistance heating of the direct current motor can lead to current reduction, and at intermediate rotating speed, the efficiency of the direct current motor is highest, so that the characteristic curve of the current and the rotating speed of the direct current motor presents an inverted U shape. The rotation speed of the direct current motor is different, and the decibel value of the sound generated when the fan works is different, and in general, the higher the rotation speed is, the larger the decibel value generated is.
Step 105, obtaining a second operation power matched with the air quality information based on the air quality information;
in particular, if air purification is required to be rapidly achieved, more air needs to be sucked by the blower, and even though the purification efficiency and power of the air purifier are not linearly increased or exponentially increased, the increase in power enables air purification to be performed more rapidly.
Step 106, obtaining a second component Bei Zhi of the direct current motor based on the second operating power;
specifically, since the voltage of the fan is constant, a matched current value can be obtained based on the second operation power, and a second fractional value can be obtained based on the current value.
Step 107, judging whether the air purifier operates in a first operation mode; if so, comparing the first decibel value with the second score Bei Zhi;
in particular, the first mode of operation may be understood as: sleep mode, reading mode, etc. require a mode in which the air purifier is low in noise when in operation.
Step 108, if the first decibel value is larger than the second decibel value, controlling the direct current motor to work with the second running power;
specifically, when the first decibel value is larger than the second decibel value, the processor controls the direct current motor to work at the second running power, and the decibel of sound generated when the direct current motor works is reduced from the first decibel value to the second decibel value, so that the environmental noise is reduced.
Step 109, if the first db value is smaller than the second db value, controlling the dc motor to continue to operate at the first operating power;
specifically, if the first decibel value is smaller than the second decibel value, the direct current motor is controlled to continue to work at the first running power, so that the decibel value generated when the air purifier continues to work is kept to be the first decibel value.
As a specific embodiment of a control method for reducing the operation noise of the air purifier, controlling the dc motor to operate at the second operation power includes:
acquiring a first rotation speed value of the direct current motor when the direct current motor works according to the instruction of the second running power;
obtaining a nominal rotation speed value of the second operation power;
comparing the nominal rotation speed value with the first rotation speed value to obtain a difference value;
and when the difference value is larger than a preset value, compensating the second operation power.
Specifically, as the air cleaner operates, the filtering effect of the filter element gradually decreases, the corresponding resistance increases, the rotation speed of the motor decreases, and the purification efficiency decreases under the same power. In order to not increase the decibel value generated when the direct current motor works, the processor obtains a first rotating speed value when the direct current motor works according to the instruction of the second operating power, and compares the nominal rotating speed value with the first rotating speed value to obtain a difference value; since the rotational speed of the direct current motor has a slight fluctuation, a preset value is set as a reasonable fluctuation interval. When the difference is greater than a preset value, the second operation power is compensated, namely: the second running power is increased to enable the actual working rotating speed of the direct current motor to reach a nominal rotating speed value, and the purifying efficiency is ensured while the decibel value is not increased.
As a specific embodiment of a control method for reducing the operation noise of the air purifier, obtaining the first operation power of the dc motor based on the first current value includes:
and obtaining the first running power based on the first current value and the working voltage of the direct current motor.
As a specific embodiment of a control method for reducing the operation noise of the air purifier, obtaining a first decibel value of the fan based on the first current value includes:
inputting the first operating power into a mapping table; the mapping table is a mapping table of the corresponding relation between the power value and the decibel value; obtaining the first decibel value based on a mapping result of the mapping table;
alternatively, the first operating power is input to a mapping function; the mapping function is a function of the corresponding relation between the power value and the decibel value; and obtaining the first decibel value based on the mapping result of the mapping table.
As one embodiment of a control method for reducing the operation noise of the air purifier, obtaining a second division value of the dc motor based on the second operation power includes:
inputting the second operating power into a mapping table; the mapping table is a mapping table of the corresponding relation between the power value and the decibel value; obtaining the second component Bei Zhi based on a mapping result of the mapping table;
alternatively, the second operating power is input to a mapping function; the mapping function is a function of the corresponding relation between the power value and the decibel value; and obtaining the second decibel value based on the mapping result of the mapping table.
As one embodiment of a control method for reducing the operation noise of an air cleaner, the method further comprises:
obtaining the residual usage amount of the filter element of the air purifier;
and when the residual usage amount is lower than a preset value, sending out prompt information when the air purifier is not in the first operation mode.
Specifically, the air suction path of the fan of the air purifier is an air inlet, a filter element, a fan and an air outlet, and when the residual usage amount of the filter element of the air purifier is lower than a preset value, the filter element needs to be replaced as soon as possible at the moment to ensure a better purifying effect, and when the air purifier is not in a first operation mode, prompt information is sent out, so that a user is not disturbed.
As one embodiment of a control method for reducing operation noise of an air cleaner, acquiring air quality information includes:
sending an acquisition instruction to a sensor of the air purifier; the acquisition instruction is used for triggering the sensor to send detection data;
and after receiving the detection data sent by the sensor, obtaining air quality information based on the detection data.
Specifically, through the arrangement, the sensor is in a dormant state under the general condition and works after receiving the acquisition instruction, so that electric energy is saved.
The embodiment of the application also discloses an air purifier.
Specifically, the apparatus includes a memory and a processor, the memory having stored thereon a computer program capable of being loaded by the processor and executing any one of the above-described control methods for reducing the operating noise of the air purifier.
The embodiment of the application also discloses a computer readable storage medium. Specifically, the computer-readable storage medium storing a computer program that can be loaded by a processor and that executes any one of the control methods for reducing the operation noise of the air cleaner described above, includes, for example: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
It should be noted that: the above embodiments are only for illustrating the present application and not for limiting the technical solutions described in the present application, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present application may be modified or substituted by the same, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present application are intended to be included in the scope of the claims of the present application.
Claims (9)
1. A control method for reducing the operation noise of an air cleaner, comprising:
acquiring air quality information in the operation process of the air purifier;
in the current operation process, a first current value of the fan of the air purifier is obtained when a direct current motor of the fan operates;
obtaining a first running power of the direct current motor based on the first current value;
obtaining a first decibel value of the fan based on the first current value;
obtaining a second operation power matched with the air quality information based on the air quality information;
obtaining a second fraction Bei Zhi of the dc motor based on the second operating power;
judging whether the air purifier operates in a first operation mode; if so, comparing the first decibel value with the second score Bei Zhi; the first mode of operation is: sleep mode, reading mode;
if the first decibel value is larger than the second decibel value, controlling the direct current motor to work at the second running power;
and if the first decibel value is smaller than the second decibel value, controlling the direct current motor to continue to work with the first running power.
2. The control method for reducing operating noise of an air purifier of claim 1 wherein controlling the dc motor to operate at the second operating power comprises:
acquiring a first rotation speed value of the direct current motor when the direct current motor works according to the instruction of the second running power;
obtaining a nominal rotation speed value of the second operation power;
comparing the nominal rotation speed value with the first rotation speed value to obtain a difference value;
and when the difference value is larger than a preset value, compensating the second operation power.
3. The control method for reducing operating noise of an air cleaner according to claim 2, wherein obtaining the first operating power of the dc motor based on the first current value comprises:
and obtaining the first running power based on the first current value and the working voltage of the direct current motor.
4. A control method for reducing operating noise of an air cleaner as defined in claim 3, wherein deriving a first decibel value of the fan based on the first current value comprises:
inputting the first operating power into a mapping table; the mapping table is a mapping table of the corresponding relation between the power value and the decibel value; obtaining the first decibel value based on a mapping result of the mapping table;
alternatively, the first operating power is input to a mapping function; the mapping function is a function of the corresponding relation between the power value and the decibel value; and obtaining the first decibel value based on the mapping result of the mapping table.
5. The method of claim 4, wherein obtaining a second division value of the dc motor based on the second operating power, comprises:
inputting the second operating power into a mapping table; the mapping table is a mapping table of the corresponding relation between the power value and the decibel value; obtaining the second component Bei Zhi based on a mapping result of the mapping table;
alternatively, the second operating power is input to a mapping function; the mapping function is a function of the corresponding relation between the power value and the decibel value; and obtaining the second decibel value based on the mapping result of the mapping table.
6. The method of claim 5, further comprising:
obtaining the residual usage amount of the filter element of the air purifier;
and when the residual usage amount is lower than a preset value, sending out prompt information when the air purifier is not in the first operation mode.
7. The method of claim 6, wherein the step of obtaining air quality information comprises:
sending an acquisition instruction to a sensor of the air purifier; the acquisition instruction is used for triggering the sensor to send detection data;
and after receiving the detection data sent by the sensor, obtaining air quality information based on the detection data.
8. An air cleaner comprising a memory and a processor, the memory having stored thereon a computer program for loading and executing the method of any one of claims 1 to 7 by the processor.
9. A computer readable storage medium, characterized in that a computer program is stored which can be loaded by a processor and which performs the method according to any of claims 1 to 7.
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| CN208901574U (en) * | 2018-09-11 | 2019-05-24 | 珠海格力电器股份有限公司 | A kind of air cleaning unit |
| CN113310181A (en) * | 2020-02-27 | 2021-08-27 | 青岛海尔空调器有限总公司 | Environment regulating system and control method thereof |
| JP3227396U (en) * | 2020-05-28 | 2020-08-20 | 新能量科技股▲ふん▼有限公司Ｐｏｗｅｒ Ｌｏｇｉｃ Ｔｅｃｈ．Ｉｎｃ． | Airflow generator with adjustable air chamber |
| CN112178862A (en) * | 2020-09-30 | 2021-01-05 | 深圳市晨北科技有限公司 | Method for controlling air purifier, air purifier and storage medium |
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