CN114838453B - Formaldehyde detection method, formaldehyde detection device, air purifier and storage medium - Google Patents
Formaldehyde detection method, formaldehyde detection device, air purifier and storage medium Download PDFInfo
- Publication number
- CN114838453B CN114838453B CN202210438707.5A CN202210438707A CN114838453B CN 114838453 B CN114838453 B CN 114838453B CN 202210438707 A CN202210438707 A CN 202210438707A CN 114838453 B CN114838453 B CN 114838453B
- Authority
- CN
- China
- Prior art keywords
- value
- compensation
- formaldehyde
- detection
- initial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/70—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
-
- 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
- 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]
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air purification, in particular to a formaldehyde detection method, a formaldehyde detection device, an air purifier and a storage medium. The formaldehyde detection method comprises the following steps: obtaining a detection value of a formaldehyde detection component; acquiring the actual rotating speed of the fan; calculating a compensation value corresponding to the detection value according to the initial detection value and the actual rotation speed of the formaldehyde detection component; and obtaining a display value corresponding to the detection value according to the detection value and the compensation value. According to the invention, the compensation value corresponding to the detection value is calculated according to the initial detection value and the actual rotation speed of the formaldehyde detection component, and the display value is obtained by compensating the detection value through the compensation value, so that the display value is more close to the actual value, and the problem of slow response speed of formaldehyde display values in formaldehyde measurement in the prior art is effectively solved.
Description
Technical Field
The invention relates to the technical field of air purification, in particular to a formaldehyde detection method, a formaldehyde detection device, an air purifier and a storage medium.
Background
Formaldehyde is a relatively common toxic and harmful gas in daily life, and although the formaldehyde content is lower in general, the harm to human bodies caused by exceeding the standard of formaldehyde is extremely large. As formaldehyde release is a slow process, it has a continuous impact on human health, and more people are concerned about the exact actual content of formaldehyde in order to take countermeasures in time.
At present, part of air purifiers have formaldehyde removal function, and have formaldehyde value display function. Most of the air purifiers with formaldehyde value display function adopt electrochemical formaldehyde sensors to detect the concentration of environmental formaldehyde and convert the concentration of environmental formaldehyde into corresponding numerical information for display. However, for a common electrochemical formaldehyde sensor, the response speed of detecting the conversion of the environmental formaldehyde concentration into a numerical value is often not fast enough or the response to interfering substances such as alcohol and the like causes a certain deviation between a display value and an actual value. For example, when the air purifier is moved from a formaldehyde-free environment to an environment containing formaldehyde, since the detection of the formaldehyde sensor relies on the free diffusion of air, it takes a certain time for other formaldehyde-containing formaldehyde in the environment to diffuse freely to the formaldehyde sensor position inside the fuselage, resulting in inaccurate formaldehyde display values at the beginning of the detection. For example, when someone uses alcohol-containing perfume or alcohol-containing disinfectant water around the air purifier to use interfering substances similar to formaldehyde molecular structures, the electrochemical formaldehyde sensor also responds, the detection value of the electrochemical formaldehyde sensor suddenly rises, but the actual formaldehyde content is not changed, so that a certain deviation exists between the display value and the actual value. Therefore, how to improve the real-time performance and the anti-interference performance of the formaldehyde display value of the air purifier using the formaldehyde sensor is very important to improve the user experience of the air purifier.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect of slow response speed of formaldehyde display numerical value when formaldehyde is measured by using an electrochemical formaldehyde sensor in the prior art, so as to provide a formaldehyde detection method, a formaldehyde detection device, an air purifier and a storage medium.
In order to solve the above problems, the present invention provides a formaldehyde detection method, comprising the steps of: obtaining a detection value of a formaldehyde detection component; acquiring the actual rotating speed of the fan; calculating a compensation value corresponding to the detection value according to the initial detection value and the actual rotation speed of the formaldehyde detection component; and obtaining a display value corresponding to the detection value according to the detection value and the compensation value.
Optionally, the step of calculating the compensation value corresponding to the detection value according to the initial detection value and the actual rotation speed of the formaldehyde detection component includes: calculating a compensation time length according to the actual rotating speed; and calculating a compensation value corresponding to the detection value in the compensation time period according to the preset final compensation value, the compensation time period and the initial compensation value corresponding to the initial detection value of the formaldehyde detection component.
Optionally, the step of calculating the compensation time length according to the actual rotation speed includes: acquiring a preset maximum rotating speed and a first duration corresponding to the maximum rotating speed; acquiring a preset minimum rotating speed and a second time length corresponding to the minimum rotating speed; and obtaining the compensation time length corresponding to the actual rotating speed by using the highest rotating speed, the lowest rotating speed, the first time length, the second time length and the actual rotating speed and adopting an interpolation method.
Optionally, the step of obtaining the initial compensation value includes: acquiring a corresponding relation between a preset interval range and an initial compensation value; determining the interval range to which the initial detection value belongs; and obtaining an initial compensation value according to the interval range to which the initial detection belongs and the corresponding relation.
Optionally, the step of calculating the compensation value corresponding to the detection value in the compensation period according to the preset final compensation value, the compensation period and the initial compensation value corresponding to the initial detection value of the formaldehyde detection component includes: calculating a difference between the initial compensation value and the final compensation value; obtaining a compensation value corresponding to each moment in the compensation time according to the difference value and a preset rule; and obtaining a compensation value corresponding to the detection value in the compensation time according to the corresponding relation between the detection value and each time in the compensation time and the compensation value corresponding to each time in the compensation time.
Optionally, after the actual rotation speed of the fan is obtained, the formaldehyde detection method further includes: acquiring the working time of the formaldehyde detection component in the current environment; and when the working time is smaller than the compensation time, executing the step of calculating the compensation value corresponding to the detection value according to the initial detection value and the actual rotating speed of the formaldehyde detection component.
Optionally, after the actual rotation speed of the fan is obtained, the formaldehyde detection method further includes: acquiring a last display value of the formaldehyde detection component; and when the absolute value of the difference between the detected value and the last displayed value is smaller than or equal to a preset threshold value, executing the step of calculating a compensation value corresponding to the detected value according to the initial detected value and the actual rotating speed of the formaldehyde detecting component.
Optionally, the formaldehyde detection method further comprises: and when the absolute value of the difference between the detected value and the last displayed value is larger than the threshold value, the last displayed value is taken as the displayed value of the formaldehyde detection component.
The invention also provides a formaldehyde detection device, which comprises: the first acquisition module is used for acquiring the detection value of the formaldehyde detection component; the second acquisition module is used for acquiring the actual rotating speed of the fan; the calculation module is used for calculating a compensation value corresponding to the detection value according to the initial detection value and the actual rotation speed of the formaldehyde detection component, and the processing module is used for obtaining a display value corresponding to the detection value according to the detection value and the compensation value.
The present invention also provides an air cleaner, comprising: a housing having an air inlet; formaldehyde detection part, which is set on the shell and near the air inlet; the fan is arranged in the shell; the controller comprises a processor and a memory, wherein the processor is electrically connected with the formaldehyde detection component and the fan, and the memory is in communication connection with the processor; the memory stores instructions executable by the processor, and the instructions are executed by the processor, so that the processor executes the formaldehyde detection method.
Optionally, an air inlet grille is arranged at the air inlet, and the distance between the formaldehyde detection part and the air inlet grille is 15-20 mm.
Optionally, the formaldehyde detecting component is disposed above the air inlet.
The invention also provides a computer readable storage medium having stored thereon computer instructions which when executed by a processor implement the formaldehyde detection method described above.
The invention has the following advantages:
1. according to the initial detection value of the formaldehyde detection component and the compensation value corresponding to the actual rotation speed calculation detection value, the detection value is compensated by the compensation value to obtain the display value, so that the display value is more close to the real value, and the problem of low formaldehyde display value response speed in the prior art is effectively solved.
2. The detection value is compensated within the compensation time, the detection value is the same as the display value after the compensation time is exceeded, compensation is not needed, and steps are simplified; the initial compensation value is different along with the difference of the initial detection value, the larger the initial detection value is, the larger the deviation between the display value and the detection value is, so that the larger the initial compensation value is, the smaller the initial detection value is, the smaller the deviation between the display value and the detection value is, and the smaller the initial compensation value is; the compensation time length is different along with different rotating speeds, the larger the rotating speed is, the shorter the compensation time length is, the smaller the rotating speed is, the slower the air convection is, the longer the compensation time length is, and the detection response speed is accelerated.
3. When the absolute value of the difference between the detected value and the last displayed value is larger than a threshold value, the environment is abnormal, the interference substances exist in the environment, the detected value detected by the formaldehyde detecting component cannot truly reflect the formaldehyde content in the environment, the last displayed value is taken as the displayed value of the formaldehyde detecting component, the displayed value displayed by the display component is controlled to be unchanged, the last displayed value can truly reflect the formaldehyde content in the environment, the instantaneity and the interference resistance of formaldehyde display values are improved, and the experience feeling of a user is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic flow chart of a formaldehyde detection method according to an embodiment of the invention;
FIG. 2 shows a simplified schematic diagram of a formaldehyde detection device according to an embodiment of the present invention;
FIG. 3 is a graph showing the change of the detected and displayed values of formaldehyde concentration with the working time according to the embodiment of the invention;
FIG. 4 is a graph showing the change of the detected and displayed values of formaldehyde concentration with time of operation according to the embodiment of the present invention;
fig. 5 shows a schematic front view of an air cleaner according to an embodiment of the present invention.
Reference numerals illustrate:
10. a housing; 20. formaldehyde detecting means; 30. an air inlet grille; 40. and an air outlet grille.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1 and 5, the formaldehyde detection method of the present embodiment includes the steps of:
acquiring a detection value of the formaldehyde detection part 20; wherein the formaldehyde detection component 20 can detect the concentration of formaldehyde, and the formaldehyde detection component 20 is a formaldehyde sensor;
acquiring the actual rotating speed of the fan;
calculating a compensation value corresponding to the detection value according to the initial detection value and the actual rotation speed of the formaldehyde detection part 20; the rotating speed of the fan can influence the flow speed of the wind field, so that the time for the formaldehyde detection part to acquire the gas in the external real environment is influenced;
and obtaining a display value corresponding to the detection value according to the detection value and the compensation value, wherein the sum of the detection value and the compensation value is the display value.
By applying the formaldehyde detection method of the embodiment, the compensation value corresponding to the detection value is calculated according to the initial detection value and the actual rotation speed of the formaldehyde detection component 20, and the display value is obtained by compensating the detection value through the compensation value, so that the display value is more close to the real value, and the problem of slow response speed of formaldehyde display values in formaldehyde measurement in the prior art is effectively solved.
In the present embodiment, the step of calculating the compensation value corresponding to the detection value from the initial detection value and the actual rotation speed of the formaldehyde detection part 20 includes: calculating a compensation time length according to the actual rotating speed; and calculating a compensation value corresponding to the detection value in the compensation time period according to the preset final compensation value, the compensation time period and the initial compensation value corresponding to the initial detection value of the formaldehyde detection component 20. The detection value is compensated within the compensation time, the detection value is the same as the display value after the compensation time is exceeded, compensation is not needed, and steps are simplified; the initial compensation value is different along with the difference of the initial detection value, the larger the initial detection value is, the larger the deviation between the display value and the detection value is, and the larger the initial compensation value is; the smaller the initial detection value is, the smaller the deviation between the display value and the detection value is, and the smaller the initial compensation value is; the compensation time length is different along with the different rotating speeds, and the larger the rotating speed is, the faster the air convection is, and the shorter the compensation time length is; the smaller the rotating speed is, the slower the air convection is, the longer the compensation time is, and the detection response speed is increased. It will be appreciated that, as an alternative embodiment, the detection value may be compensated after the compensation period has elapsed, in which case the compensation value is 0.
In this embodiment, the step of calculating the compensation period according to the actual rotation speed includes: acquiring a preset maximum rotating speed and a first duration corresponding to the maximum rotating speed; acquiring a preset minimum rotating speed and a second time length corresponding to the minimum rotating speed; and obtaining the compensation time length corresponding to the actual rotating speed by using the highest rotating speed, the lowest rotating speed, the first time length, the second time length and the actual rotating speed and adopting an interpolation method. The first time length and the second time length are obtained through wind field simulation conditions of the air purifier and actual test data, and the actual test data are obtained through multiple tests and averaging. For example, the maximum rotation speed is 1450r/min, the value of the first time period is 0.4 hours, the value of the second time period is 1.3 hours when the minimum rotation speed is 950r/min, and the compensation time period corresponding to the middle rotation speed between the maximum rotation speed and the minimum rotation speed is obtained by adopting an interpolation method. Specifically, the interpolation method is to calculate the average difference, the highest rotation speed is 1450r/min n, the lowest rotation speed is 950r/min, the rotation speed difference is 500, the compensation time is 0.4 to 1.3 hours, the time difference is 0.9 hours, the interpolation calculation is 0.9/500=0.0018 hours/rotation, and the compensation time is increased by 0.0018 hours when the rotation speed is reduced by 1 r/min.
In this embodiment, the step of obtaining the initial compensation value includes: acquiring a corresponding relation between a preset interval range and an initial compensation value; determining the interval range to which the initial detection value belongs; and obtaining an initial compensation value according to the interval range to which the initial detection belongs and the corresponding relation. The initial compensation value is obtained by a large amount of actual test data, the initial compensation value is related to the initial detection value, the larger the initial detection value is, the larger the initial compensation value is, and the initial display value is the sum of the initial detection value and the initial compensation value, wherein part of the actual test data is shown in the following table 1.
TABLE 1
The compensation value Δn in table 1 is the difference between the test value of the standard instrument and the test value of the formaldehyde sensor.
Specifically, the number of the interval ranges is three and the interval ranges are a first interval range, a second interval range and a third interval range respectively, when the initial detection value is in the first interval range, the initial compensation value is a first compensation value, when the initial detection value is in the second interval range, the initial compensation value is a second compensation value, when the initial detection value is in the third interval range, the initial compensation value is a third compensation value, the first compensation value is smaller than the second compensation value, and the second compensation value is smaller than the third compensation value. For example, the first interval range is (0,0.03), the first offset value is 0.03, the second interval range is (0.03,0.08), the second compensation value is 0.05, the third interval range is 0.08, in +++). The second compensation value is 0.07.
In this embodiment, the step of calculating the compensation value corresponding to the detection value in the compensation period according to the preset final compensation value, the compensation period and the initial compensation value corresponding to the initial detection value of the formaldehyde detection component 20 includes: calculating a difference between the initial compensation value and the final compensation value; obtaining a compensation value corresponding to each moment in the compensation time according to the difference value and a preset rule; and obtaining a compensation value corresponding to the detection value in the compensation time according to the corresponding relation between the detection value and each time in the compensation time and the compensation value corresponding to each time in the compensation time. The final compensation value is 0, the compensation value decreases with the increase of time, for example, the compensation value decreases at a constant speed with the increase of time, and the compensation value changes with the change of time to form a straight line. It will be appreciated that as an alternative embodiment, the compensation value decreases with increasing speed over time, and the compensation value changes over time to form a curve.
In this embodiment, after the actual rotation speed of the fan is obtained, the formaldehyde detection method further includes: acquiring the working time of the formaldehyde detection component 20 in the current environment; when the operation period is smaller than the compensation period, a step of calculating a compensation value corresponding to the detection value based on the initial detection value and the actual rotation speed of the formaldehyde detection part 20 is performed. When the operation time length is longer than or equal to the compensation time length, the detection value detected by the formaldehyde detection component 20 is the true value of the current environment, and compensation for the detection value is not needed. It will be appreciated that this step may not be provided, and the detection value may be compensated after the compensation time is exceeded, and the compensation value is 0.
In this embodiment, after the actual rotation speed of the fan is obtained, the formaldehyde detection method further includes: acquiring a last display value of the formaldehyde detecting member 20; when the absolute value of the difference between the detected value and the last displayed value is equal to or smaller than a preset threshold value, a step of calculating a compensation value corresponding to the detected value from the initial detected value and the actual rotational speed of the formaldehyde detecting part 20 is performed. When the absolute value of the difference between the detection value and the last display value is smaller than or equal to a preset threshold value, the environment is judged to be normal, no interference substances exist at the moment, and the detection value can be compensated.
In this embodiment, the formaldehyde detection method further includes: when the absolute value of the difference between the detected value and the last displayed value is greater than the threshold, the environment is not normal, the interference substances exist in the environment, the detected value detected by the formaldehyde detecting component 20 cannot truly reflect the formaldehyde content in the environment, the last displayed value is taken as the displayed value of the formaldehyde detecting component 20, the displayed value displayed by the display component is controlled to be unchanged, the last displayed value can truly reflect the formaldehyde content in the environment, the instantaneity and the interference resistance of the formaldehyde displayed value are improved, and the experience feeling of a user is improved.
In particular, under the common practical use environment, the formaldehyde does not change by more than 0.1mg/m 3 The mutation of (2) occurs only in the presence of interfering substances, so that the threshold is 0.1mg/m 3 。
In this embodiment, after obtaining the display value corresponding to the detection value according to the detection value and the compensation value, the formaldehyde detection method further includes: the control display section displays the display value. Wherein the display component is a display screen and the like.
In this embodiment, before the initial detection value of the formaldehyde detecting means is acquired, the formaldehyde detecting method further includes: and acquiring a starting signal of the air purifier. Because the formaldehyde detection component detects inaccurately only in a period of time after the air purifier is started, the initial detection value of the formaldehyde detection component is obtained after the air purifier is started, then the initial compensation value is obtained according to the initial detection value, and then the running time and the like are continuously obtained.
According to the formaldehyde detection method, the corresponding speed and accuracy of the wind speed influence sensor are considered, the wind speed of the fan is used for calculating the compensation value, the detection value is calibrated, and meanwhile, the treatment of the interference objects is relatively simple and clear.
The invention also provides a formaldehyde detection device, which comprises: a first acquisition module for acquiring a detection value of the formaldehyde detection part 20; the second acquisition module is used for acquiring the actual rotating speed of the fan; the calculating module is used for calculating a compensation value corresponding to the detection value according to the initial detection value and the actual rotation speed of the formaldehyde detection component 20, and the processing module is used for obtaining a display value corresponding to the detection value according to the detection value and the compensation value.
In this embodiment, the calculation module includes: the first calculation sub-module is used for calculating the compensation time length according to the actual rotating speed; the second calculating sub-module is used for calculating the compensation value corresponding to the detection value in the compensation time period according to the preset final compensation value, the compensation time period and the initial compensation value corresponding to the initial detection value of the formaldehyde detection component 20.
In this embodiment, the first computing submodule includes: the first acquisition unit is used for acquiring a preset maximum rotating speed and a first duration corresponding to the maximum rotating speed; the second acquisition unit is used for acquiring a preset minimum rotating speed and a second duration corresponding to the minimum rotating speed; the first processing unit is used for obtaining the compensation time length corresponding to the actual rotating speed by utilizing the highest rotating speed, the lowest rotating speed, the first time length, the second time length and the actual rotating speed and adopting an interpolation method.
In this embodiment, the formaldehyde detection device further includes a third obtaining module, configured to obtain an initial compensation value, where the third obtaining module includes: the third acquisition unit is used for acquiring the corresponding relation between the preset interval range and the initial compensation value; the second processing unit is used for determining the interval range to which the initial detection value belongs; and the third processing unit is used for obtaining an initial compensation value according to the interval range and the corresponding relation of the initial detection.
In this embodiment, the second calculation submodule includes: a first calculation unit for calculating a difference between the initial compensation value and the final compensation value; the fourth processing unit is used for obtaining a compensation value corresponding to each moment in the compensation duration according to the difference value and a preset rule; and the fifth processing unit is used for obtaining the compensation value corresponding to the detection value in the compensation time according to the corresponding relation between the detection value and each time in the compensation time and the compensation value corresponding to each time in the compensation time.
In this embodiment, the formaldehyde detection device further includes: a fourth obtaining module, configured to obtain a working time of the formaldehyde detecting component 20 in the current environment; the first execution module is used for executing the step of calculating the compensation value corresponding to the detection value according to the initial detection value and the actual rotation speed of the formaldehyde detection component 20 when the working time is smaller than the compensation time.
In this embodiment, the formaldehyde detection device further includes: a fifth acquisition module for acquiring a last display value of the formaldehyde detection unit 20; and a second execution module for executing a step of calculating a compensation value corresponding to the detection value according to the initial detection value and the actual rotation speed of the formaldehyde detection part 20 when the absolute value of the difference between the detection value and the last display value is less than or equal to a preset threshold value.
In this embodiment, the formaldehyde detection device further includes: and a third execution module, configured to, when the absolute value of the difference between the detected value and the last displayed value is greater than the threshold value, take the last displayed value as the displayed value of the formaldehyde detection component 20, and control the displayed value displayed by the display component to remain unchanged.
In this embodiment, the formaldehyde detection device further includes: and the fourth execution module is used for controlling the display part to display the display value.
In this embodiment, the formaldehyde detection device further includes: and the sixth acquisition module is used for acquiring a starting signal of the air purifier.
The present invention also provides an air cleaner, as shown in fig. 2 and 5, comprising: the formaldehyde detector comprises a shell 10, a formaldehyde detector, a fan and a controller, wherein the shell 10 is provided with an air inlet; the formaldehyde detection part is arranged on the shell 10 and is close to the air inlet; the fan is arranged in the shell 10; the controller comprises a processor and a memory, the processor is electrically connected with the formaldehyde detection component and the fan, and the memory is in communication connection with the processor; the memory stores instructions executable by the processor, and the instructions are executed by the processor, so that the processor executes the formaldehyde detection method.
Specifically, the formaldehyde detection component is a formaldehyde sensor, the formaldehyde sensor belongs to an electrochemical sensor, the detection mechanism is based on the fuel cell principle of a current ampere method, water molecules in a formaldehyde molecule combined environment are ionized at a working electrode to generate hydrogen ions and CO2, as the hydrogen ions carry positive charges, equal electrons (negative charges) are attracted to form micro-current (nA), the current is proportional to the formaldehyde concentration, then hydrogen atoms generated at a counting electrode and the working electrode and the equal electrons are transferred to the counting electrode through an electrolyte, oxygen in the combined environment reacts at the counting electrode to generate water molecules, and the formaldehyde concentration is converted by detecting the current in the reaction process.
From the chemical reaction mechanism of the formaldehyde sensor, the formaldehyde sensor is greatly influenced by water molecules in the environment. If natural convection is not available, the reaction is carried out with the chemical substances of the formaldehyde sensor by completely depending on the diffusion effect of air, the reaction speed and the reaction process are relatively slow, if the air convection is increased, the reaction speed can be increased, but too strong convection cannot be available, because the too strong convection can influence the water molecules in the chemical reaction, thereby influencing the detection accuracy of the formaldehyde sensor. Therefore, the position selection of the formaldehyde sensor is important. Through wind field analysis of the air purifier, the position close to the air inlet is the mounting position of the formaldehyde sensor, and the detection accuracy of the formaldehyde sensor can be improved at the position close to the air inlet.
In the embodiment, the air inlet is provided with the air inlet grille 30, and the distance between the formaldehyde detection part and the air inlet grille 30 is 15 mm-20 mm. Through wind field analysis of the air purifier, the position of the position which is 15-20 mm away from the air inlet grille is obtained, so that good convection wind speed can be obtained, high response speed can be obtained, and the influence on the accuracy of the formaldehyde sensor due to overlarge wind speed can be avoided.
In this embodiment, the formaldehyde detecting component is disposed above the air inlet, and the specific position is shown in fig. 5. It will be appreciated that as an alternative embodiment, the formaldehyde detection means may also be arranged below or to the left or right of the air inlet.
In this embodiment, the air purifier further includes an air outlet grille, the housing 10 further has an air outlet, the air outlet is located at the top of the housing, the air inlet is located at the lower portion of the housing, and the air outlet is provided with the air outlet grille 40. Wherein. The arrowed line in fig. 5 is the flow direction of the air flow.
In this embodiment, the air purifier further includes a display unit, and the controller is electrically connected to the display unit, and the controller sends out a control signal to perform independent control and display of each unit.
Specifically, when the air purifier is started, the controller acquires a starting signal, then starts to read the detection value of the formaldehyde sensor, reads the detection value once every 0.5 seconds, compares the read detection value with the last display value, judges that an interference substance exists in the environment if the difference between the read detection value and the last display value is large, controls the displayed data to be unchanged, and can resist the interference substance to influence the formaldehyde sensor reading in the display process, so that the experience of a user is improved. Wherein the large difference between the read detection value and the last display value means that the absolute value of the difference between the read detection value and the last display value is larger than 0.1mg/m 3 。
If the read detection value and the last display value are not more than 0.1mg/m 3 And judging that the environment is normal. At this time, the controller reads the rotation speed of the fan, and calculates the time T required for keeping the display value and the detection value the same according to the rotation speed of the fan.
The display value in the middle process is evenly smoothed according to the initial compensation value and the change time T, namely, after the time T, the detection value and the display value of the formaldehyde sensor are identical (as shown in fig. 3 and 4). In the calibration process, the controller transmits the calibrated data to the display component, and the display value is more approximate to the true value.
In this embodiment, the processor may be a central processing unit (Central Processing Unit, CPU). The processor may also be any other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof.
In this embodiment, the memory is used as a non-transitory computer readable storage medium for storing non-transitory software programs, non-transitory computer executable programs, and modules.
The memory may include a memory program area and a memory data area, wherein the memory program area may store an operating system, at least one application program required for a function; the storage data area may store data created by the processor, etc. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory may optionally include memory located remotely from the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The invention also provides a computer readable storage medium having stored thereon computer instructions which when executed by a processor implement the formaldehyde detection method described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. the method is used for compensating and calibrating the detection value of the formaldehyde sensor aiming at the conditions of different wind speeds, different concentrations and different chemical reaction time, so that the display value is more close to the true value, and the defect of slow formaldehyde display numerical response speed when the electrochemical formaldehyde sensor is used for formaldehyde measurement in the prior art is overcome.
2. Comparing the detection value with the last display value, if the difference between the detection value and the last display value is larger, determining that an anti-alcohol and other interference substances exist in the environment, controlling the displayed data to be unchanged, wherein the displayed data are the readings of the formaldehyde sensor which are influenced by the anti-interference substances, the formaldehyde sensor display value still responds under the condition of the interference substances, and an anti-interference algorithm is adopted, so that the user experience is improved, and the defect that the real concentration value of formaldehyde is difficult to accurately reflect under the condition of the interference substances in the prior art is overcome.
3. Through wind field analysis, the proper position of the formaldehyde sensor is designed, and the self-circulation wind field of the air purifier is utilized to accelerate air convection and detection, so that the problem of overlong accurate numerical time of detection by means of natural diffusion is avoided, and the detection response speed can be accelerated.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (11)
1. The formaldehyde detection method is characterized by comprising the following steps of:
obtaining a detection value of the formaldehyde detection component (20);
acquiring the actual rotating speed of the fan;
calculating a compensation value corresponding to the detection value according to the initial detection value of the formaldehyde detection component (20) and the actual rotation speed;
obtaining a display value corresponding to the detection value according to the detection value and the compensation value;
wherein the step of calculating a compensation value corresponding to the detection value according to the initial detection value of the formaldehyde detection component (20) and the actual rotation speed comprises the following steps: calculating a compensation time length according to the actual rotating speed; calculating a compensation value corresponding to the detection value within the compensation period according to a preset final compensation value, the compensation period and an initial compensation value corresponding to an initial detection value of the formaldehyde detection component (20);
the step of calculating a compensation value corresponding to the detection value within the compensation period according to a preset final compensation value, the compensation period and an initial compensation value corresponding to an initial detection value of the formaldehyde detection component (20) comprises: calculating a difference between the initial compensation value and the final compensation value; obtaining a compensation value corresponding to each moment in the compensation time according to the difference value and a preset rule; and obtaining a compensation value corresponding to the detection value in the compensation time period according to the corresponding relation between the detection value and each time in the compensation time period and the compensation value corresponding to each time in the compensation time period.
2. The formaldehyde detection method according to claim 1, wherein the step of calculating a compensation period based on the actual rotational speed includes:
acquiring a preset maximum rotating speed and a first duration corresponding to the maximum rotating speed;
acquiring a preset minimum rotating speed and a second time length corresponding to the minimum rotating speed;
and obtaining a compensation time length corresponding to the actual rotating speed by utilizing the maximum rotating speed, the minimum rotating speed, the first time length, the second time length and the actual rotating speed and adopting an interpolation method.
3. The formaldehyde detection method according to claim 1, wherein the step of obtaining the initial compensation value comprises:
acquiring a corresponding relation between a preset interval range and an initial compensation value;
determining the interval range to which the initial detection value belongs;
and obtaining the initial compensation value according to the interval range to which the initial detection belongs and the corresponding relation.
4. A formaldehyde detection method according to any one of claims 1 to 3, characterized in that after the actual rotational speed of the blower is obtained, the formaldehyde detection method further comprises:
acquiring the working time of the formaldehyde detection component (20) in the current environment;
and when the working time is smaller than the compensation time, executing the step of calculating a compensation value corresponding to the detection value according to the initial detection value of the formaldehyde detection component (20) and the actual rotating speed.
5. A formaldehyde detection method according to any one of claims 1 to 3, characterized in that after the actual rotational speed of the blower is obtained, the formaldehyde detection method further comprises:
acquiring a last display value of the formaldehyde detection component (20);
and when the absolute value of the difference between the detected value and the last displayed value is smaller than or equal to a preset threshold value, executing the step of calculating a compensation value corresponding to the detected value according to the initial detected value of the formaldehyde detection component (20) and the actual rotating speed.
6. The formaldehyde detection method according to claim 5, further comprising:
and when the absolute value of the difference between the detected value and the last displayed value is larger than the threshold value, the last displayed value is taken as the displayed value of the formaldehyde detection component (20).
7. A formaldehyde detection apparatus for performing the formaldehyde detection method of claim 1, the formaldehyde detection apparatus comprising:
a first acquisition module for acquiring a detection value of the formaldehyde detection means (20);
the second acquisition module is used for acquiring the actual rotating speed of the fan;
a calculation module for calculating a compensation value corresponding to the detection value according to the initial detection value of the formaldehyde detection component (20) and the actual rotation speed,
and the processing module is used for obtaining a display value corresponding to the detection value according to the detection value and the compensation value.
8. An air purifier, comprising:
a housing (10) having an air inlet;
formaldehyde detection means arranged on the housing (10) and close to the air inlet;
the fan is arranged in the shell (10);
the controller comprises a processor and a memory, wherein the processor is electrically connected with the formaldehyde detection component and the fan, and the memory is in communication connection with the processor;
wherein the memory stores instructions executable by the processor to cause the processor to perform the formaldehyde detection method of any one of claims 1-6.
9. The air purifier according to claim 8, wherein an air inlet grille (30) is arranged at the air inlet, and the distance between the formaldehyde detection component and the air inlet grille (30) is 15-20 mm.
10. The air cleaner of claim 8, wherein the formaldehyde detection component is disposed above the air intake.
11. A computer readable storage medium having stored thereon computer instructions, which when executed by a processor, implement the formaldehyde detection method of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210438707.5A CN114838453B (en) | 2022-04-21 | 2022-04-21 | Formaldehyde detection method, formaldehyde detection device, air purifier and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210438707.5A CN114838453B (en) | 2022-04-21 | 2022-04-21 | Formaldehyde detection method, formaldehyde detection device, air purifier and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114838453A CN114838453A (en) | 2022-08-02 |
| CN114838453B true CN114838453B (en) | 2023-06-13 |
Family
ID=82565239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210438707.5A Active CN114838453B (en) | 2022-04-21 | 2022-04-21 | Formaldehyde detection method, formaldehyde detection device, air purifier and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114838453B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444377A (en) * | 2016-01-13 | 2016-03-30 | 东莞市利发爱尔空气净化系统有限公司 | Control method and device for air cleaner |
| CN110320328A (en) * | 2019-06-21 | 2019-10-11 | 珠海格力电器股份有限公司 | A kind of concentration of formaldehyde detection method, device and air purifier |
| CN210863662U (en) * | 2019-06-21 | 2020-06-26 | 珠海格力电器股份有限公司 | Formaldehyde concentration detection device and air purifier |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4209802B2 (en) * | 2003-04-15 | 2009-01-14 | 日本特殊陶業株式会社 | Gas detection device and vehicle auto ventilation system |
| CN204493248U (en) * | 2015-03-04 | 2015-07-22 | 周志斌 | Rotation speed of fan bucking-out system |
| CN110030739B (en) * | 2018-01-11 | 2021-05-18 | 宁波方太厨具有限公司 | Combustion control method of gas water heater |
| KR20190141584A (en) * | 2018-06-14 | 2019-12-24 | 웅진코웨이 주식회사 | Air purifier and the method of control the same |
| CN109655518A (en) * | 2019-02-25 | 2019-04-19 | 珠海格力电器股份有限公司 | A kind of formaldehyde electrochemical sensing detection device, calibration method and clarifier |
| CN110307608B (en) * | 2019-06-11 | 2020-10-16 | 珠海格力电器股份有限公司 | Formaldehyde detection processing method and device, storage medium and air purifier |
| CN211177205U (en) * | 2019-10-10 | 2020-08-04 | 莱克电气股份有限公司 | Majority shows intellectual detection system display device and uses its air purification equipment |
| TWI722793B (en) * | 2020-02-07 | 2021-03-21 | 研能科技股份有限公司 | Mobile gas detection and cleaning device |
| CN111624310A (en) * | 2020-06-09 | 2020-09-04 | 中国石油化工股份有限公司 | Method for resisting high-speed airflow of multi-sensor cavity |
| CN114019110B (en) * | 2021-11-16 | 2022-06-03 | 河南驰诚电气股份有限公司 | Workplace gas detector end cloud integration platform based on big data |
-
2022
- 2022-04-21 CN CN202210438707.5A patent/CN114838453B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444377A (en) * | 2016-01-13 | 2016-03-30 | 东莞市利发爱尔空气净化系统有限公司 | Control method and device for air cleaner |
| CN110320328A (en) * | 2019-06-21 | 2019-10-11 | 珠海格力电器股份有限公司 | A kind of concentration of formaldehyde detection method, device and air purifier |
| CN210863662U (en) * | 2019-06-21 | 2020-06-26 | 珠海格力电器股份有限公司 | Formaldehyde concentration detection device and air purifier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114838453A (en) | 2022-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106706852B (en) | A kind of scaling method and system of gas concentration sensor | |
| RU2534942C2 (en) | Detection of blockages and interruptions in aspirating smoke detector (asd) | |
| EP2656067B1 (en) | Method for measuring breath alcohol concentration and apparatus therefor | |
| CN107990512B (en) | Air conditioning equipment and formaldehyde detection method and device thereof | |
| US20090043515A1 (en) | Digital gas detector and noise reduction techniques | |
| WO2013191634A1 (en) | Method for measuring breath alcohol concentration and apparatus therefor | |
| CN112198209B (en) | Formaldehyde detection method and formaldehyde detection device | |
| CN111458395B (en) | Kalman filtering method and device for changing Q value and readable storage medium | |
| JP4184007B2 (en) | Gas sensor characteristic compensation device and gas concentration measurement device | |
| CN114838453B (en) | Formaldehyde detection method, formaldehyde detection device, air purifier and storage medium | |
| CN113866241A (en) | Apparatus and method for monitoring gas concentration and sensor | |
| CN115420787A (en) | Oxygen sensor deviation compensation method, device, electronic equipment and storage medium | |
| EP3983788A1 (en) | Interrogation of capillary-limited sensors | |
| Marinov et al. | Improvement of NDIR carbon dioxide sensor accuracy | |
| CN110824109A (en) | Evaluation test method and test stand for dust holding performance of high-efficiency air filter material | |
| CN114674987A (en) | Formaldehyde detection method and device based on formaldehyde sensor and air purifier | |
| CN112540112B (en) | Sensor calibration method, device, equipment and storage medium | |
| CN111288949A (en) | Micropore closure detection method and device | |
| JP2010175320A (en) | Gas detector | |
| JP2010175321A (en) | Gas detector | |
| CN113719981B (en) | Indoor and outdoor air pressure difference detection method and device, air conditioning equipment and storage medium | |
| JP2000193577A (en) | Method for inspecting moisture permeability characteristics of film | |
| CA2552130A1 (en) | Methods of detecting gaseous component levels in a breath | |
| CN118066672A (en) | Air volume control method of indoor unit, controller, air conditioner and storage medium | |
| CN114777287A (en) | Method and device for acquiring pollution degree of indoor unit of air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |