CN111707595A - Filter detection method, detection device and range hood - Google Patents
Filter detection method, detection device and range hood Download PDFInfo
- Publication number
- CN111707595A CN111707595A CN202010583852.3A CN202010583852A CN111707595A CN 111707595 A CN111707595 A CN 111707595A CN 202010583852 A CN202010583852 A CN 202010583852A CN 111707595 A CN111707595 A CN 111707595A
- Authority
- CN
- China
- Prior art keywords
- value
- filter
- pressure
- resistance value
- wind speed
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2035—Arrangement or mounting of filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
Abstract
The embodiment of the invention provides a detection method and a detection device of a filter and a range hood, wherein when a fan is detected to be in a preset working frequency, a first pressure value acquired by a first pressure detector and a second pressure value acquired by a second pressure detector are acquired; determining an air flow value through the filter based on the second pressure value; calculating a resistance value of the filter at the rated surface wind speed according to the first pressure value, the second pressure value and the wind value; if the resistance value is larger than the preset resistance value, the filter is prompted to be abnormal, so that the user can replace the filter in time, and the smoke exhaust capacity is improved.
Description
Technical Field
The invention relates to the technical field of range hoods, in particular to a detection method and a detection device of a filter and a range hood.
Background
Nowadays, range hood has become one of the indispensable household electrical appliances in the resident's life, range hood's filter is after using a period, need change just can reach the effect of purifying the oil smoke, it just changes when the filter has arrived the change cycle at present, nevertheless because the frequency of use of cigarette machine and the difference of oil smoke volume, probably cause the filter to seriously overrun before reaching the change cycle, the resistance greatly increased can appear in the filter overutilization, lead to smoke exhaust effect variation, greatly reduced user's use experience.
Disclosure of Invention
In view of the above, the present invention provides a detection method and a detection device for a filter, and a range hood, so as to alleviate the above technical problems.
In a first aspect, an embodiment of the present invention provides a method for detecting a filter, where the method is applied to a controller in a range hood, and the controller is in communication connection with a fan, a first pressure detector, and a second pressure detector on the range hood; the detection method comprises the following steps: when the fan is detected to be in a preset working frequency, acquiring a first pressure value acquired by a first pressure detector and a second pressure value acquired by a second pressure detector; the first pressure value is the front end static pressure of the filter, and the second pressure value is the rear end static pressure of the filter; determining an air flow value through the filter based on the second pressure value; calculating a resistance value of the filter according to the first pressure value, the second pressure value and the air quantity value; and if the resistance value is larger than the preset resistance value, prompting that the filter is abnormal.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the step of determining, based on the second pressure value, an air volume value passing through the filter includes: acquiring a preset pressure air volume relation table, wherein the pressure air volume relation table stores the corresponding relation between a pressure value and an air volume value; and searching the air volume value corresponding to the second pressure value according to the pressure air volume relation table.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the step of calculating a resistance value of the filter according to the first pressure value, the second pressure value, and the air volume value includes: acquiring a pre-stored sectional area and a rated plane wind speed value of the filter; calculating the surface wind speed value of the filter according to the wind speed value and the sectional area; and calculating a resistance value based on the first pressure value, the second pressure value, the rated surface wind speed value and the surface wind speed value.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the step of calculating a face wind speed value of the filter according to the wind speed value and the cross-sectional area includes: calculating the surface wind speed value of the filter by the following formula: vNoodle＝Q/S; wherein, VNoodleRepresents the surface wind speed value, Q represents the wind speed value, and S represents the cross-sectional area.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the step of calculating a resistance value based on the first pressure value, the second pressure value, the rated surface wind speed value, and the surface wind speed value includes: the resistance value is calculated by the following equation: pNoodle＝(P1-P2)*VIs provided with 2/VNoodle 2(ii) a Wherein, PNoodleDenotes the resistance value, P1Representing a first pressure value, P2Representing a second pressure value, VIs provided withRepresenting rated surface wind speed value, VNoodleRepresenting the face wind speed value.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the method further includes: if the resistance value is not larger than the preset resistance value, judging whether the resistance value is larger than the initial resistance value of the filter or not; if so, the filter is prompted to be abnormal.
With reference to the fifth possible implementation manner of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the method further includes: if the resistance value is not larger than the initial resistance value, determining the dust holding capacity based on the resistance value; and calculating the residual service life of the filter according to the dust holding capacity.
With reference to the sixth possible implementation manner of the first aspect, an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the step of determining the dust amount based on the resistance value includes: acquiring a preset resistance dust holding relational expression table, wherein the resistance dust holding relational expression table stores a corresponding relation between a resistance value and dust holding amount; and searching the dust holding amount corresponding to the resistance value according to the resistance dust holding relational table.
With reference to the sixth possible implementation manner of the first aspect, an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein the step of calculating the remaining usage time of the filter according to the dust holding capacity includes: acquiring the rated dust holding capacity of a prestored filter; and calculating the residual using time length according to the rated dust holding amount and the dust holding amount.
With reference to the eighth possible implementation manner of the first aspect, an embodiment of the present invention provides a ninth possible implementation manner of the first aspect, where the step of calculating the remaining usage time according to the rated dust amount and the dust holding amount includes: calculating the residual using time length by the following formula; t ═ m/mContainer) 100% of the total weight; wherein T represents the residual service time, m represents the dust holding capacity, mContainerIndicating the nominal dust holding capacity.
In a second aspect, an embodiment of the present invention further provides a detection apparatus for a filter, where the detection apparatus is applied to a controller in a range hood, and the controller is in communication connection with a fan, a first pressure detector and a second pressure detector on the range hood; the above-mentioned detection device includes: the acquisition module is used for acquiring a first pressure value acquired by the first pressure detector and a second pressure value acquired by the second pressure detector when the fan is detected to be at a preset working frequency; the first pressure value is the front end static pressure of the filter, and the second pressure value is the rear end static pressure of the filter; a determination module for determining an air volume value passing through the filter based on the second pressure value; the calculation module is used for calculating a resistance value of the filter according to the first pressure value, the second pressure value and the air quantity value; and the prompting module is used for prompting that the filter is abnormal if the resistance value is larger than the preset resistance value.
In a third aspect, an embodiment of the present invention further provides a range hood, where the range hood includes a chassis, a filter and a controller integrated in the chassis, and a fan, a first pressure detector and a second pressure detector connected to the controller; wherein, the controller is provided with the detection device of the filter.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a detection method and a detection device of a filter and a range hood, wherein when a fan is detected to be in a preset working frequency, a first pressure value acquired by a first pressure detector and a second pressure value acquired by a second pressure detector are acquired; determining an air flow value through the filter based on the second pressure value; calculating a resistance value of the filter at the rated surface wind speed according to the first pressure value, the second pressure value and the wind value; if the resistance value is larger than the preset resistance value, the filter is prompted to be abnormal, so that the user can replace the filter in time, and the smoke exhaust capacity is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a range hood according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for detecting a filter according to an embodiment of the present invention;
FIG. 3 is a flow chart of another filter detection method according to an embodiment of the present invention;
FIG. 4 is a flow chart of another method for detecting a filter according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a detection device of a filter according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another filter detection device according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The filter in the range hood is a key device for filtering oil smoke, and if an abnormal filter cannot be replaced in time, the smoke exhaust efficiency can be reduced, and the human health is affected.
For the convenience of understanding the present embodiment, a detailed description will be given to a method for detecting a filter disclosed in the present embodiment.
Fig. 1 shows a schematic structural diagram of a range hood, as shown in fig. 1, the range hood includes a cabinet 100, and a filter 101, a controller 102, a fan 103, a first pressure detector 104, and a second pressure detector 105 that are integrated inside the cabinet 100; the blower 103, the first pressure detector 104 and the second pressure detector 105 are all in communication connection with the controller 102.
The fan 103 can make the generated oil smoke waste gas pass through the filter 101 according to the airflow direction shown in fig. 1, and the filter 101 filters the oil smoke waste gas to remove oil smoke pollutants in the oil smoke waste gas; the first pressure detector 104 and the second pressure detector 105 are respectively located at the front end and the rear end of the filter 101 in the airflow direction to detect the static pressure values at the front and rear ends of the filter 101.
Based on the above description, the present embodiment provides a method for detecting a filter, which is applied to a controller in a range hood, and referring to a flowchart of the method for detecting a filter shown in fig. 2, the method for detecting a filter includes the following steps:
step S202, when the fan is detected to be in a preset working frequency, acquiring a first pressure value acquired by a first pressure detector and a second pressure value acquired by a second pressure detector; the first pressure value is the front end static pressure of the filter, and the second pressure value is the rear end static pressure of the filter;
the first pressure detector 104 and the second pressure detector 105 are devices capable of detecting static gas pressure, such as pressure sensors; according to fig. 1, since the first pressure detector 104 is placed at the front end of the filter with respect to the direction of the air flow, the first pressure value obtained is the front end static pressure of the air flow that has not passed through the filter, and since the second pressure detector 105 is placed at the rear end of the filter with respect to the direction of the air flow, the second pressure value obtained is the rear end static pressure of the air flow that has passed through the filter.
The preset operating frequency may be a specific certain operating frequency value, or may be an operating frequency range, which is not limited herein, for example, when the preset operating frequency is in a range of [50HZ-100HZ ], and when the controller 102 detects that the current operating frequency of the fan 103 is in the preset operating frequency range, the first pressure value collected by the first pressure detector 104 and the second pressure value collected by the second pressure detector 105 are obtained.
Step S204, determining an air quantity value passing through the filter based on the second pressure value;
the air volume value is the air volume of the current oil smoke waste gas passing through the filter, and in this embodiment, the air volume value can be determined according to the second pressure value collected by the second pressure detector 105.
Step S206, calculating a resistance value of the filter according to the first pressure value, the second pressure value and the air quantity value;
and step S208, if the resistance value is larger than the preset resistance value, prompting that the filter is abnormal.
The preset resistance value can be PFinal (a Chinese character of 'gan')K, wherein PFinal (a Chinese character of 'gan')The final resistance of the filter is represented, k represents the early warning coefficient of early replacement, and the value is usually 0.6-1; the final resistance is a difference between the front and rear static pressures at the rated surface wind speed when the filter reaches a set dust holding amount, and the dust holding amount is a contamination attached to the filter when the difference between the front and rear static pressures reaches the final resistanceMass of the product.
The abnormal condition of the filter usually means that the net surface of the filter is seriously blocked, the net surface is damaged, or the service life reaches the limit time of the use of the material, if the resistance value obtained by the calculation is larger than the threshold value>PFinal (a Chinese character of 'gan')K, it indicates that the service life of the filter is about to reach the limit time, and the user needs to be reminded to replace the filter in time.
The embodiment of the invention provides a detection method of a filter, wherein when a fan is detected to be in a preset working frequency, a first pressure value acquired by a first pressure detector and a second pressure value acquired by a second pressure detector are acquired; determining an air flow value through the filter based on the second pressure value; calculating a resistance value of the filter at the rated surface wind speed according to the first pressure value, the second pressure value and the wind value; if the resistance value is larger than the preset resistance value, the filter is prompted to be abnormal, so that the user can replace the filter in time, and the smoke exhaust capacity is improved.
The controller is used as the central processing unit of the whole range hood, and can be configured with a corresponding circuit system, a control interface and the like to realize the functions. Specifically, the controller may include a single chip, a DSP (Digital Signal Processing), an ARM (Advanced RISC machine, ARM processor), or other Digital logic controller capable of being used for automation control, and may load the control instruction into the memory at any time for storage and execution. Meanwhile, the system can also include units such as a memory, an input/output unit, a power module, and a digital analog unit, which are provided with CPU instructions and related information inside, and the units can be specifically set according to actual use conditions, which is not limited in this embodiment.
The embodiment provides another detection method of the filter, which is implemented on the basis of the above embodiment; this embodiment focuses on a specific implementation of determining an air flow value through the filter based on the second pressure value. As shown in fig. 3, a flow chart of another method for detecting a filter, the method for detecting a filter in this embodiment includes the following steps:
step S302, when the fan is detected to be in a preset working frequency, acquiring a first pressure value acquired by a first pressure detector and a second pressure value acquired by a second pressure detector;
step S304, acquiring a preset pressure air volume relation table, wherein the pressure air volume relation table stores the corresponding relation between a pressure value and an air volume value;
if the pressure value and the air volume value are in a linear relation, the pressure air volume relation table stores a linear relation between the pressure value and the air volume value, for example, 2 pressure value is equal to the air volume value; if the pressure value and the air quantity value are in a nonlinear relation, the pressure air quantity relation table can store a plurality of pressure values and air quantity values which are in one-to-one correspondence with each pressure value; if the pressure value and the air quantity value are in a nonlinear relation, the pressure and air quantity relation table can store a plurality of different pressure value ranges corresponding to different air quantity values, for example, the pressure range is [0-10Pa ]]The corresponding air volume value is 300m3H, pressure range of [20-40Pa]The corresponding air volume value is 500m3And/h, description is not repeated herein, wherein the corresponding relationship between the pressure value and the air volume value may be set according to actual needs, and is not limited herein.
S306, searching an air volume value corresponding to the second pressure value according to the pressure air volume relation table;
if it is known from examining the pressure/air volume relationship table that the linear relationship between the pressure value and the air volume value is 2 × pressure value to air volume value, when the second pressure value is 100Pa, the air volume value corresponding to the second pressure value is 200m3/h。
Step S308, acquiring the pre-stored sectional area and rated surface wind speed value of the filter;
the cross section is the projection area of the effective ventilation part of the filter in the direction perpendicular to the airflow direction, and the rated plane wind speed value is the effective wind speed value of the airflow of the lampblack waste gas passing through the filter perpendicularly.
Step S310, calculating a surface wind speed value of the filter according to the wind speed value and the sectional area;
wherein, the surface wind speed value of the filter can be calculated by the following formula: vNoodleQ/S; wherein, VNoodleRepresents the surface wind speed value, Q represents the wind speed value, and S represents the cross-sectional area.
Step S312, calculating a resistance value based on the first pressure value, the second pressure value, the rated surface wind speed value and the surface wind speed value;
specifically, the resistance value is calculated by the following equation: pNoodle＝(P1-P2)*VIs provided with 2/VNoodle 2(ii) a Wherein, PNoodleDenotes the resistance value, P1Representing a first pressure value, P2Representing a second pressure value, VIs provided withRepresenting rated surface wind speed value, VNoodleRepresenting the face wind speed value.
And step S314, if the resistance value is larger than the preset resistance value, prompting that the filter is abnormal.
In this embodiment, the prompting device may be disposed in a prompting device connected to the controller, and when the resistance value is greater than a preset resistance value, the controller triggers the prompting device to prompt a user, where the prompting device may be an indicator light or a display screen, and is not limited herein; when the filter is abnormal, the controller triggers the indicator light to light or the display screen displays corresponding prompt characters.
According to the detection method of the filter, the resistance value can be accurately calculated through the series of formulas, and when the controller judges that the resistance value is larger than the preset resistance value, the user can be reminded of replacing the filter in time through the prompting device, so that the use experience of the user is improved while the filtering efficiency is guaranteed.
The embodiment provides another detection method of the filter, which is implemented on the basis of the above embodiment; this embodiment focuses on the specific embodiment where the resistance value is not greater than the preset resistance value. As shown in fig. 4, a flow chart of another method for detecting a filter, the method for detecting a filter in this embodiment includes the following steps:
step S402, when the fan is detected to be in a preset working frequency, acquiring a first pressure value acquired by a first pressure detector and a second pressure value acquired by a second pressure detector;
step S404, determining an air quantity value passing through the filter based on the second pressure value;
step S406, calculating a resistance value of the filter according to the first pressure value, the second pressure value and the air quantity value;
step S408, if the resistance value is larger than the preset resistance value, prompting that the filter is abnormal;
in this embodiment, if the resistance value is greater than the preset resistance value, it indicates that the filter is about to reach the limit time, and the above-mentioned prompt device may be triggered to prompt that the filter is abnormal, and if the resistance value is not greater than the preset resistance value, step S410 is executed.
Step S410, if the resistance value is not larger than the preset resistance value, judging whether the resistance value is larger than the initial resistance value of the filter or not;
the initial resistance value is a front-back static pressure difference value under the condition of the rated surface wind speed when the filter is used for the first time, if the resistance value is not more than the initial resistance value, the filter is damaged, and then the step S412 is executed; if the resistance value is larger than the initial resistance value, which indicates that the filter can be used for a period of time, executing step S414;
step S412, prompting that the filter is abnormal;
step S414, determining the dust holding capacity based on the resistance value;
wherein, the process of determining the dust amount based on the resistance value can be realized by the steps A1-A2:
step A1, acquiring a preset resistance dust-holding relational expression table, wherein the resistance dust-holding relational expression table stores a corresponding relation between a resistance value and dust holding amount;
if the resistance value and the dust holding amount are in a linear relationship, the resistance and dust holding relational expression table stores a linear relational expression corresponding to the resistance value and the dust holding amount, for example, 2 × the resistance value is the dust holding amount; if the resistance value and the dust holding amount are in a nonlinear relationship, the resistance and dust holding relational table can store a plurality of resistance values and the dust holding amounts which are in one-to-one correspondence with the resistance values; if the resistance value and the dust holding amount are in a nonlinear relationship, which is stored in the resistance dust holding relational table, a plurality of different resistance value ranges may correspond to one different dust holding amount, for example, the dust holding amount corresponding to the resistance range of [0-10Pa ] is 100 g, and the dust holding amount corresponding to the resistance range of [20-40Pa ] is 500 g, which is not described herein one by one, wherein the corresponding relationship between the resistance value and the dust holding amount may be set according to actual needs, and is not limited herein.
And step A2, searching the dust holding amount corresponding to the resistance value according to the resistance dust holding relational table.
As can be seen from the table of the resistance-dust holding relational expression, if the linear relational expression of the resistance value and the dust holding amount is 2 × resistance value — dust holding amount, the dust holding amount corresponding thereto is 200 g when the resistance value is 100 Pa.
Step S416, calculating the residual service life of the filter according to the dust containing quantity.
The residual service life is the service life of the filter reaching the limit time, and the filter can be replaced in time according to the residual service life; specifically, the above process of calculating the remaining service life of the filter according to the dust holding capacity may be implemented by steps B1-B2:
step B1, acquiring the rated dust holding capacity of the pre-stored filter;
since the rated dust holding amount is a specification parameter of the dust holding amount fixed to the filter, the rated dust holding amounts corresponding to different types of filters are different, and are not limited herein.
And step B2, calculating the residual using time length according to the rated dust holding capacity and the dust holding capacity.
Specifically, the remaining usage time can be calculated by the following equation; t ═ m/mContainer) 100% of the total weight; wherein T represents the residual service time, m represents the dust holding capacity, mContainerIndicating the nominal dust holding capacity. The residual service life of the filter can be accurately obtained through the calculation of the formula, and based on the residual service life, the filter can be replaced by a worker in time.
According to the detection method of the filter, the residual service life of the filter can be accurately calculated under the condition that the filter does not reach the limit time or is damaged, and workers can replace the filter in time based on the residual service life.
Corresponding to the method embodiment, the embodiment of the invention provides a detection device of a filter, the detection device is applied to a controller in a range hood, and the controller is in communication connection with a fan, a first pressure detector and a second pressure detector on the range hood; fig. 5 is a schematic structural diagram of a detection device of a filter, which includes:
an obtaining module 502, configured to obtain a first pressure value collected by a first pressure detector and a second pressure value collected by a second pressure detector when it is detected that the fan is at a preset operating frequency; the first pressure value is the front end static pressure of the filter, and the second pressure value is the rear end static pressure of the filter;
a first determination module 504 for determining an air flow value through the filter based on the second pressure value;
a first calculating module 506, configured to calculate a resistance value of the filter according to the first pressure value, the second pressure value, and the air quantity value;
the first prompt module 508 is configured to prompt the filter to be abnormal if the resistance value is greater than a preset resistance value.
The embodiment of the invention provides a detection device of a filter, wherein when a fan is detected to be in a preset working frequency, a first pressure value acquired by a first pressure detector and a second pressure value acquired by a second pressure detector are acquired; determining an air flow value through the filter based on the second pressure value; calculating a resistance value of the filter at the rated surface wind speed according to the first pressure value, the second pressure value and the wind value; if the resistance value is larger than the preset resistance value, the filter is prompted to be abnormal, so that the user can replace the filter in time, and the smoke exhaust capacity is improved.
The first determining module 504 is further configured to obtain a preset pressure air volume relation table, where a corresponding relation between a pressure value and an air volume value is stored in the pressure air volume relation table; and searching the air volume value corresponding to the second pressure value according to the pressure air volume relation table.
The first calculating module 506 is further configured to obtain a pre-stored sectional area of the filter and a rated plane wind speed value; calculating the surface wind speed value of the filter according to the wind speed value and the sectional area; and calculating a resistance value based on the first pressure value, the second pressure value, the rated surface wind speed value and the surface wind speed value.
The first calculating module 506 is further configured to calculate a sum according to the wind amountThe step of calculating the surface wind speed value of the filter by the sectional area comprises the following steps: calculating the surface wind speed value of the filter by the following formula: vNoodleQ/S; wherein, VNoodleRepresents the surface wind speed value, Q represents the wind speed value, and S represents the cross-sectional area.
The first calculating module 506 is further configured to calculate a resistance value based on the first pressure value, the second pressure value, the rated surface wind speed value, and the surface wind speed value, and includes: the resistance value is calculated by the following equation: pNoodle＝(P1-P2)*VIs provided with 2/VNoodle 2(ii) a Wherein, PNoodleDenotes the resistance value, P1Representing a first pressure value, P2Representing a second pressure value, VIs provided withRepresenting rated surface wind speed value, VNoodleRepresenting the face wind speed value.
Based on the above-mentioned detection device of the filter, another detection device of the filter is further provided in the embodiments of the present invention, referring to the schematic structural diagram of the detection device of the filter shown in fig. 6, the detection device of the filter includes, in addition to the structure shown in fig. 5, a determination module 510 connected to the first calculation module 506, for determining whether the resistance value is greater than the initial resistance value of the filter if the resistance value is not greater than the preset resistance value; and the second prompting module 512 is connected to the judging module 510 and is configured to prompt that the filter is abnormal when the judging module judges yes.
The detecting device further comprises a second determining module 514 connected to the determining module 510, for determining the dust holding capacity based on the resistance value if the resistance value is not greater than the initial resistance value; and a second calculating module 516 connected to the second determining module 514, for calculating the remaining service life of the filter according to the dust holding capacity.
The second determining module 514 is further configured to obtain a preset resistance dust holding relational expression table, where a corresponding relationship between a resistance value and a dust holding amount is stored in the resistance dust holding relational expression table; and searching the dust holding amount corresponding to the resistance value according to the resistance dust holding relational table.
The second calculating module 516 is further configured to obtain a preset rated dust holding capacity of the filter; and calculating the residual using time length according to the rated dust holding amount and the dust holding amount.
The second calculating module 516 is further configured to calculate the remaining usage time by the following equation; t ═ m/mContainer) 100% of the total weight; wherein T represents the residual service time, m represents the dust holding capacity, mContainerIndicating the nominal dust holding capacity.
The filter detection device provided by the embodiment of the invention has the same technical characteristics as the filter detection method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The embodiment of the invention also provides a range hood, wherein the range hood comprises a case, a filter and a controller which are integrated in the case, and a fan, a first pressure detector and a second pressure detector which are connected with the controller; wherein, the controller is provided with the detection device of the filter.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the range hood and the detection apparatus described above may refer to the corresponding processes in the foregoing detection method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the following embodiments are merely illustrative of the present invention, and not restrictive, and the scope of the present invention is not limited thereto: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. The detection method of the filter is characterized in that the detection method is applied to a controller in a range hood, and the controller is in communication connection with a fan, a first pressure detector and a second pressure detector on the range hood; the detection method comprises the following steps:
when the fan is detected to be in a preset working frequency, acquiring a first pressure value acquired by the first pressure detector and a second pressure value acquired by the second pressure detector; wherein the first pressure value is the front end static pressure of the filter, and the second pressure value is the back end static pressure of the filter;
determining an air volume value through the filter based on the second pressure value;
calculating a resistance value of the filter according to the first pressure value, the second pressure value and the air volume value;
and if the resistance value is larger than a preset resistance value, prompting that the filter is abnormal.
2. The detection method according to claim 1, wherein the step of determining the value of the air flow through the filter based on the second pressure value comprises:
acquiring a preset pressure air volume relation table, wherein the pressure air volume relation table stores the corresponding relation between a pressure value and an air volume value;
and searching the air quantity value corresponding to the second pressure value according to the pressure air quantity relation table.
3. The detection method according to claim 1, wherein the step of calculating a resistance value of the filter from the first pressure value, the second pressure value and the air volume value comprises:
acquiring a pre-stored sectional area and a rated plane wind speed value of the filter;
calculating a surface wind speed value of the filter according to the wind speed value and the sectional area;
calculating the resistance value based on the first pressure value, the second pressure value, a rated surface wind speed value and the surface wind speed value.
4. The method of claim 3, wherein the step of calculating a face wind speed value of the filter from the wind speed value and the cross-sectional area comprises:
calculating the face wind speed value of the filter by the following formula:
Vnoodle＝Q/S；
Wherein, VNoodleRepresenting the surface wind speed value, Q representing the wind speed value and S representing the cross-sectional area.
5. The method of testing according to claim 3, wherein the step of calculating said resistance value based on said first pressure value, said second pressure value, a nominal face wind speed value and said face wind speed value comprises:
the resistance value is calculated by the following formula:
Pnoodle＝(P1-P2)*VIs provided with 2/VNoodle 2；
Wherein, PNoodleRepresenting the resistance value, P1Representing said first pressure value, P2Representing said second pressure value, VIs provided withRepresenting said rated surface wind speed value, VNoodleRepresenting the face wind speed value.
6. The detection method according to claim 1, further comprising:
if the resistance value is not larger than a preset resistance value, judging whether the resistance value is larger than the initial resistance value of the filter or not;
if yes, prompting that the filter is abnormal.
7. The detection method according to claim 6, further comprising:
if the resistance value is not larger than the initial resistance value, determining the dust holding capacity based on the resistance value;
and calculating the residual service life of the filter according to the dust holding amount.
8. The detecting method according to claim 7, wherein the step of determining the dust holding amount based on the resistance value includes:
acquiring a preset resistance dust holding relational expression table, wherein the resistance dust holding relational expression table stores a corresponding relation between a resistance value and a dust holding amount;
and searching the dust holding amount corresponding to the resistance value according to the resistance dust holding relational table.
9. The method for detecting according to claim 7, wherein the step of calculating the remaining usage time of the filter according to the dust holding amount comprises:
acquiring the pre-stored rated dust holding capacity of the filter;
and calculating the residual service life according to the rated dust holding amount and the dust holding amount.
10. The method for detecting according to claim 9, wherein the step of calculating the remaining usage time period according to the rated dust holding amount and the dust holding amount comprises:
calculating the remaining usage time by the following equation;
T＝(m/mcontainer)*100％；
Wherein T represents the remaining service time, m represents the dust holding capacity, and mContainerRepresenting the rated dust amount.
11. The detection device of the filter is characterized in that the detection device is applied to a controller in a range hood, and the controller is in communication connection with a fan, a first pressure detector and a second pressure detector on the range hood;
the detection device includes:
the acquisition module is used for acquiring a first pressure value acquired by the first pressure detector and a second pressure value acquired by the second pressure detector when the fan is detected to be at a preset working frequency; wherein the first pressure value is the front end static pressure of the filter, and the second pressure value is the back end static pressure of the filter;
a determination module for determining an air volume value passing through the filter based on the second pressure value;
the calculation module is used for calculating a resistance value of the filter according to the first pressure value, the second pressure value and the air volume value;
and the prompting module is used for prompting that the filter is abnormal if the resistance value is larger than a preset resistance value.
12. A range hood is characterized by comprising a case, a filter and a controller which are centralized in the case, and a fan, a first pressure detector and a second pressure detector which are connected with the controller;
wherein the controller is provided with a detection device of the filter of claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010583852.3A CN111707595A (en) | 2020-06-23 | 2020-06-23 | Filter detection method, detection device and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010583852.3A CN111707595A (en) | 2020-06-23 | 2020-06-23 | Filter detection method, detection device and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111707595A true CN111707595A (en) | 2020-09-25 |
Family
ID=72541867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010583852.3A Pending CN111707595A (en) | 2020-06-23 | 2020-06-23 | Filter detection method, detection device and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111707595A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136530A (en) * | 2021-11-23 | 2022-03-04 | 中国铁道科学研究院集团有限公司 | Method and device for determining air pressure difference between inlet and outlet of converter |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050247194A1 (en) * | 2004-05-06 | 2005-11-10 | Pengju Kang | Technique for detecting and predicting air filter condition |
| CN101196413A (en) * | 2006-12-05 | 2008-06-11 | 上海智城分析仪器制造有限公司 | Device and method for biological safety detection, control and alarm |
| CN104492198A (en) * | 2014-12-29 | 2015-04-08 | 东莞市宇洁新材料有限公司 | Life-measurable composite particulate filter |
| CN104524896A (en) * | 2014-12-29 | 2015-04-22 | 东莞市宇洁新材料有限公司 | Indoor air purification device and method capable of detecting service life of particulate filter |
| CN106126858A (en) * | 2016-07-06 | 2016-11-16 | 西安理工大学 | A kind of method of fan type selecting in electrokinetic cell air cooling system |
| CN106289836A (en) * | 2016-07-29 | 2017-01-04 | 北京京丰燃气发电有限责任公司 | A kind of performance determination method of gas turbine inlet air filtration device |
| WO2017088671A1 (en) * | 2015-11-25 | 2017-06-01 | 佛山市城市森林净化科技有限公司 | Method for determining life of filter screen of air purifier |
| CN206539756U (en) * | 2016-12-28 | 2017-10-03 | 杭州老板电器股份有限公司 | The Electric air valve that a kind of air quantity is automatically adjusted |
| KR20180067813A (en) * | 2016-12-13 | 2018-06-21 | (주)엠피코 | Apparatus for automatic cleaning filter for pipe |
| CN108398278A (en) * | 2018-01-08 | 2018-08-14 | 佛山市顺德区阿波罗环保器材有限公司 | A kind of resistance determination method of air filter |
| CN108421337A (en) * | 2018-02-11 | 2018-08-21 | 广东美的环境电器制造有限公司 | A kind of strainer service life determines method, air purifier and computer storage media |
| CN207922322U (en) * | 2017-12-27 | 2018-09-28 | 杭州老板电器股份有限公司 | A kind of kitchen ventilator of intelligent reminding cleaning filter screen |
| CN108800433A (en) * | 2018-04-24 | 2018-11-13 | 青岛朗兹环保科技有限公司 | New blower fan screen net life detecting method |
| CN109030306A (en) * | 2018-06-26 | 2018-12-18 | 杭州老板电器股份有限公司 | Kitchen ventilator condition detection method, device, system and kitchen ventilator |
| CN110824109A (en) * | 2019-10-15 | 2020-02-21 | 同济大学 | Evaluation test method and test stand for dust holding performance of high-efficiency air filter material |
-
2020
- 2020-06-23 CN CN202010583852.3A patent/CN111707595A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050247194A1 (en) * | 2004-05-06 | 2005-11-10 | Pengju Kang | Technique for detecting and predicting air filter condition |
| CN101196413A (en) * | 2006-12-05 | 2008-06-11 | 上海智城分析仪器制造有限公司 | Device and method for biological safety detection, control and alarm |
| CN104492198A (en) * | 2014-12-29 | 2015-04-08 | 东莞市宇洁新材料有限公司 | Life-measurable composite particulate filter |
| CN104524896A (en) * | 2014-12-29 | 2015-04-22 | 东莞市宇洁新材料有限公司 | Indoor air purification device and method capable of detecting service life of particulate filter |
| WO2017088671A1 (en) * | 2015-11-25 | 2017-06-01 | 佛山市城市森林净化科技有限公司 | Method for determining life of filter screen of air purifier |
| CN106126858A (en) * | 2016-07-06 | 2016-11-16 | 西安理工大学 | A kind of method of fan type selecting in electrokinetic cell air cooling system |
| CN106289836A (en) * | 2016-07-29 | 2017-01-04 | 北京京丰燃气发电有限责任公司 | A kind of performance determination method of gas turbine inlet air filtration device |
| KR20180067813A (en) * | 2016-12-13 | 2018-06-21 | (주)엠피코 | Apparatus for automatic cleaning filter for pipe |
| CN206539756U (en) * | 2016-12-28 | 2017-10-03 | 杭州老板电器股份有限公司 | The Electric air valve that a kind of air quantity is automatically adjusted |
| CN207922322U (en) * | 2017-12-27 | 2018-09-28 | 杭州老板电器股份有限公司 | A kind of kitchen ventilator of intelligent reminding cleaning filter screen |
| CN108398278A (en) * | 2018-01-08 | 2018-08-14 | 佛山市顺德区阿波罗环保器材有限公司 | A kind of resistance determination method of air filter |
| CN108421337A (en) * | 2018-02-11 | 2018-08-21 | 广东美的环境电器制造有限公司 | A kind of strainer service life determines method, air purifier and computer storage media |
| CN108800433A (en) * | 2018-04-24 | 2018-11-13 | 青岛朗兹环保科技有限公司 | New blower fan screen net life detecting method |
| CN109030306A (en) * | 2018-06-26 | 2018-12-18 | 杭州老板电器股份有限公司 | Kitchen ventilator condition detection method, device, system and kitchen ventilator |
| CN110824109A (en) * | 2019-10-15 | 2020-02-21 | 同济大学 | Evaluation test method and test stand for dust holding performance of high-efficiency air filter material |
Non-Patent Citations (3)
| Title |
|---|
| 严俊等: "WGP-01型无隔板高效空气过滤器", 《河北工业大学学报》, no. 01 * |
| 席德清: "《粮食大辞典》", 北京：中国物资出版社, pages: 147 * |
| 章重洋等: "空气过滤器寿命实验研究及经济性分析", 《暖通空调》, no. 05 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136530A (en) * | 2021-11-23 | 2022-03-04 | 中国铁道科学研究院集团有限公司 | Method and device for determining air pressure difference between inlet and outlet of converter |
| CN114136530B (en) * | 2021-11-23 | 2023-10-13 | 中国铁道科学研究院集团有限公司 | Method and device for determining inlet and outlet air pressure difference of converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI749044B (en) | Air filter condition sensing | |
| CN107684801B (en) | Formaldehyde filter screen replacing method and device for air purifier and air purifier | |
| JP6491767B2 (en) | Air cleaner | |
| CN107990512B (en) | Air conditioning equipment and formaldehyde detection method and device thereof | |
| CN109008801A (en) | Electric appliance screen replacing detection method, system, intake calculation method and dust catcher | |
| CN109195684A (en) | For determining the method for having utilized capacity of air filter | |
| JP2010017708A (en) | Method for determining life of filter in bag house and filter monitoring system | |
| KR101982566B1 (en) | Air Cleaner And Method Of Predicting Filter Remaining Life Time Of Air Cleaner | |
| CN111707595A (en) | Filter detection method, detection device and range hood | |
| CN104330329B (en) | The monitoring method and device of filtering material for air purifying extent of deterioration | |
| CN105222194A (en) | The control method of smoke exhaust ventilator and smoke exhaust ventilator | |
| CN108025241A (en) | Air-conditioning and its control method | |
| CN108050673A (en) | Air-conditioner control method, device, air conditioner and storage medium | |
| CN113513823B (en) | Control device and method for fresh air filter unit and fresh air filter unit | |
| CN109106286A (en) | Dust collection equipment and its control device and method | |
| KR20190004068A (en) | air conditioner and operating method thereof | |
| CN107063336A (en) | Environment detection method and device | |
| KR101982565B1 (en) | Air Cleaner And Method Of Predicting Filter Life Of Air Cleaner | |
| CN113465124B (en) | Fan filter screen service life prediction method and device, and storage medium and device | |
| CN215295070U (en) | Filter screen and range hood | |
| JP2018176111A (en) | Blower | |
| CN216868613U (en) | Central range hood and filter screen weighing system thereof | |
| KR100944315B1 (en) | Apparatus and method for sensing block of airfilter | |
| CN209147180U (en) | A kind of range hood with lubricating cup oil mass detection device | |
| CN105935680B (en) | A kind of ventilation hoods for laboratories |
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 |