CN105642038B - Efficacy detection device, detection method and the lung ventilator of filter core - Google Patents
Efficacy detection device, detection method and the lung ventilator of filter core Download PDFInfo
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- CN105642038B CN105642038B CN201511032084.8A CN201511032084A CN105642038B CN 105642038 B CN105642038 B CN 105642038B CN 201511032084 A CN201511032084 A CN 201511032084A CN 105642038 B CN105642038 B CN 105642038B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0086—Filter condition indicators
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0087—Environmental safety or protection means, e.g. preventing explosion
- A61M16/009—Removing used or expired gases or anaesthetic vapours
- A61M16/0093—Removing used or expired gases or anaesthetic vapours by adsorption, absorption or filtration
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/75—General characteristics of the apparatus with filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
- B01D2273/18—Testing of filters, filter elements, sealings
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- Respiratory Apparatuses And Protective Means (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention discloses a kind of efficacy detection device of filter core, the filter core is arranged on inside air flue, it is characterised in that described device includes：Pressure measurement cell, the pressure data of filter core efficiency is characterized for gathering, and the pressure data is that air-flow passes through the pressure data that is associated caused by the filter core with filter core；Computing unit, for being calculated according to the pressure data and corresponding to the reference data of the pressure data, obtain relative data；Comparing unit, for the relative data to be obtained into comparative result compared with corresponding to the specific threshold of the relative data, the comparative result is used to represent the filter core efficiency.Present invention also offers a kind of efficiency detection method of filter core and a kind of lung ventilator.Quantitatively, the concentration information of particulate matter can be relatively accurately obtained, so as to evaluate the filtering efficiency of filter core by measuring specific pressure data using the device or method of the present invention.
Description
Technical field
The present invention relates to lung ventilator technical field, more particularly, to a kind of efficacy detection device of filter core, detection method
A kind of and lung ventilator.
Background technology
Influence of the current indoor air quality to health has turned into the problem of World Focusing.With bar of living and work
The progressively improvement of part, the time of urban population activity indoors is also constantly extending, therefore room air pollution is to directly affect
An important factor for health.
In the case where environment is contaminated, there can be substantial amounts of dust in air, what people sucked when breathing is not pure
Net air but dust, people's these dust are lived and health has serious influence.People is in eupnea, breathing
Road can obstruct most of particulate matter and foreign matter, but for wearing the patient of lung ventilator, due to the gas pressure of lung ventilator output
Power is much larger than normal indoor gas pressure, when being now conveyed to the gas of patient by lung ventilator and passing through respiratory tract, respiratory tract pair
The filtering of foreign matter and cleaning action are significantly reduced in gas.Based on this reason, most of lung ventilators in air intake or can all go out
Air filter is installed at gas port end, and such air filter primarily serves foreign matter in the filtering of assisted respiartion road and clean air
Function, wherein the part to play a major role is filtering element for air filter.
Filtering element for air filter can remove the solid particle in air, the tiny dust impurity crossed in air filtering or have peculiar smell
Air, can protection equipment worked in pure air environment, and can ensure patient suction gas cleaning, when fluid enters
After the filter core for entering to be equipped with certain specification filter screen, its impurity or peculiar smell are blocked, and the stream thing cleaned is flowed out by filter core.Pass through filter
The air that the filtering of core makes to be contaminated reaches certain cleanliness factor, meets clean state required for patient to reach.
Therefore, filter core is the core component of air filter.Filter core to the filtering efficiency of foreign matter in air to filter core extremely
Close important, the filtering efficiency of filter core is high, then can fall most of foreign body filtering in air, prevent from entering patients with respiratory tract,
To filtering and the effect of cleaning.But design, operate or usage time due to be likely to result in the filter inefficiency of filtration core
It is different larger, or even when filter core usage time is long, substantial amounts of foreign matter is attached on screen pack, foreign matters of these attachments are in ventilation
Respiratory tract is brought into, causes secondary pollution, so as to not play a part of not only filtering and clean, forms pollution sources on the contrary.
For these reasons, the assessment to the filtering efficiency of filter core is just particularly important.But in the prior art, mostly
Number lung ventilator producer is all provided solely for filter core, does not fully take into account risk caused by secondary pollution, therefore offer pair
The function that filter core efficiency is prompted.Or at other in the prior art, although it is contemplated that this risk and function, but simply
Increase the prompting of a periodic replacement filter core in equipment, effective monitoring and prevention can not be accomplished.Simultaneously because such filter core
The prompting mode of efficiency does not account for the difference of the objective use environment of equipment, frequency of use and occupation mode, therefore easily
Cause when equipment sends filter element replacing prompting, filter core efficiency is reduced to unusable state or when equipment sends filter already
When core changes prompting, filter core efficiency is also of a relatively high, without changing.Cause the prompting of filter element replacing no real for user
Border reference significance.
Therefore, it is necessary to which a kind of detection means and method of the filtering efficiency of filter core, can be reduced in filter element filtering effect
Differentiated when to a certain degree, the gas of Pollution protection is by conveying patients with respiratory tract.
The content of the invention
The present invention proposes to solve the problems, such as that existing filter check device is unable to accurate judgement filter element filtering efficiency.
According to the first aspect of the invention, there is provided a kind of efficacy detection device of filter core, the filter core are arranged on air flue
Inside, described device include：Pressure measurement cell, the pressure data of filter core efficiency is characterized for gathering, and the pressure data is
Air-flow passes through the pressure data that is associated caused by the filter core with filter core；Computing unit, for according to the pressure data and
Calculated corresponding to the reference data of the pressure data, obtain relative data；Comparing unit, for by the relative data with
It is compared corresponding to the specific threshold of the relative data to obtain comparative result, the comparative result is used to represent the filter core
Efficiency.
Preferably, comparing unit is additionally operable to：When the comparative result represents that the relative data is more than specific threshold, sentence
Fixed presently described filter core efficiency is unqualified；When the comparative result represents that the relative data is not more than specific threshold, sentence
Fixed presently described filter core efficiency is qualified.
Preferably, the pressure measurement cell, it is additionally operable to characterize the pressure of filter core efficiency with predetermined sample frequency collection
Data；The comparing unit, it is additionally operable to when the continuous n times comparative result obtained according to the pressure data sampled every time judges to work as
When preceding filter core efficiency is unqualified, it is unqualified to judge the filter core efficiency.
Preferably, the pressure data of the sign filter core efficiency is the weight data of filter core；The pressure measurement cell bag
Include：Weight measurement unit, the filter core is placed in the measurement surface of the weight measurement unit, for gathering the weight of the filter core
Measure data；The computing unit, for using filter core initial weight as reference data, according to the weight data of the filter core and
The filter core initial weight calculates the weight difference of filter core as relative data.
Preferably, the pressure data of the sign filter core efficiency is the barometric information along airflow direction upper filter both sides；Institute
Stating device also includes being arranged on the second barometric surveying unit not filtered in path；The measuring unit includes：It is arranged on mistake
The first barometric surveying unit in path is filtered, for gathering the barometric information filtered in path；The second barometric surveying list
Member, for gathering reference number of the barometric information as the barometric information filtered corresponding to described in path not filtered in path
According to being supplied to the computing unit；The computing unit, for having filtered barometric information and the ginseng in path according to
Examine data and calculate the air pressure difference of filter core both sides as relative data.
Preferably, described device also includes：Alarm unit, for being sent out when comparing unit judges that filter core efficiency is unqualified
Go out alarm signal；And/or air-blower control unit, for controlling blower fan to stop when comparing unit judges that filter core efficiency is unqualified
Operation.
According to the second aspect of the invention, there is provided a kind of lung ventilator, including device as described in the first aspect of the invention.
According to the third aspect of the invention we, there is provided a kind of efficiency detection method of filter core, the filter core are arranged on air flue
Inside, including：Measuring process, the pressure data of filter core efficiency is characterized for gathering, and the pressure data passes through described for air-flow
The pressure data associated caused by filter core with filter core；Calculation procedure, for according to the pressure data and corresponding to the pressure
The reference data of data is calculated, and obtains relative data；Comparison step, for the relative data is relative with corresponding to this
The specific threshold of data is compared to obtain comparative result, and the comparative result is used to represent the filter core efficiency.
Preferably, the comparison step also includes：When the comparative result represents that the relative data is more than specific threshold
When, it is unqualified to judge presently described filter core efficiency；When the comparative result represents that the relative data is not more than specific threshold
When, it is qualified to judge presently described filter core efficiency.
Preferably, the measuring process, it is additionally operable to the predetermined sample frequency collection pressure for characterizing filter core efficiency
Data；The comparison step, it is additionally operable to when the continuous n times comparative result obtained according to the pressure data sampled every time judges to work as
When preceding filter core efficiency is unqualified, it is unqualified to judge the filter core efficiency.
Preferably, the pressure data of the sign filter core efficiency is the weight data of filter core；Wherein：The measuring process,
It is additionally operable to gather the weight data of the filter core；The calculation procedure, it is additionally operable to using filter core initial weight as reference data, root
The weight difference of filter core is calculated as relative data according to the weight data of the filter core and the filter core initial weight.
Preferably, the pressure data of the sign filter core efficiency is the barometric information along airflow direction upper filter both sides；Its
In：The measuring process, it is additionally operable to gather the barometric information filtered in path；Methods described also includes：Reference data obtains
Step, for gathering reference of the barometric information as the barometric information filtered corresponding to described in path do not filtered in path
Data；And the calculation procedure, the barometric information and the reference data for being additionally operable to filter according in path calculate
The air pressure difference of filter core both sides is as relative data.
It was found by the inventors of the present invention that prior art only can be by recording being determined the need for using duration for filter core
Change, this record is very rough, can not accurately detect filter core efficiency and can not be directed to different use environments at all, use
Frequency and application method, which provide, has the targetedly detection of filter core efficiency and prompting.The present invention is specifically imitated by detecting with filter core
The related pressure data of energy, quantitatively, relatively accurately to obtain the concentration information of particulate matter, so as to evaluate the filtering of filter core effect
Can, and then judge whether to need to change filter core.Therefore, the technical assignment or technology to be solved that the present invention to be realized are asked
Topic be it is that those skilled in the art never expect or it is not expected that, therefore the present invention is a kind of new technical scheme.
By referring to the drawings to the present invention exemplary embodiment detailed description, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
It is combined in the description and the accompanying drawing of a part for constitution instruction shows embodiments of the invention, and even
It is used for the principle for explaining the present invention together with its explanation.
Fig. 1 is the block diagram of the efficacy detection device of the filter core of the present invention.
Fig. 2 is the flow chart of the efficiency detection method of the filter core of the present invention.
Fig. 3 is the schematic diagram of one embodiment of the efficacy detection device of the filter core of the present invention.
Fig. 4 is the filter core efficiency of the present invention and the graph of relation of weight difference.
Fig. 5 is the schematic diagram of another embodiment of the efficacy detection device of the filter core of the present invention.
Fig. 6 is the filter core efficiency of the present invention and the graph of relation of pressure differential.
Embodiment
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that：Unless have in addition
Body illustrates that the unlimited system of part and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The scope of invention.
The description only actually at least one exemplary embodiment is illustrative to be never used as to the present invention below
And its application or any restrictions that use.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
Fig. 1 is the block diagram of the efficacy detection device of filter core according to an embodiment of the invention.
Set as shown in figure 1, the efficacy detection device of filter core according to embodiments of the present invention may be directly applied to lung ventilator
Among standby, such as in medical breathing machine or home ventilator, typically this lung ventilator includes power supply, main frame, air flue, humidification machine
With the element such as blender, in addition the lung ventilator be also possible to coordinate source of the gas when in use, under the control of main frame, passing through air flue will
Gas such as oxygen or empty oxygen gas mixture in source of the gas are supplied to user, and the configuration of lung ventilator provided herein, which is only in that, to be shown
Example, the efficacy detection device of filter core of the invention are not limited only to above-mentioned application.
The efficacy detection device of filter core according to an embodiment of the invention include pressure measurement cell 10, computing unit 20 with
And comparing unit 30, wherein filter core are arranged on inside air flue.As described above, the air flue can be lung ventilator air flue.
Pressure measurement cell 10, the pressure data of filter core efficiency is characterized for gathering, and the pressure data passes through for air-flow
The pressure data associated caused by the filter core with filter core.
The filter core efficiency mentioned in this specification and subsidiary claim, refer to the filter effect of filter core, i.e. filter core energy
Enough abilities for continuing to obstruct particulate matter, the ability has been adhered to filter core or the factor such as the total amount of existing particulate matter is relevant.
Characterize filter core efficiency pressure data can be understood as air-flow by caused by during the filter core with filter core phase
The pressure data of association.Further, the pressure data can be various, such as the air pressure associated with filter core
Data, ballast data/weight data, pressure data etc..Consider that the associated pressure data of collection filter core is used as sign filter
The reason for foundation of core efficiency, is that air flue has the characteristic for ventilating, and filter core, which is arranged in air flue, to be led in gas
The data variation with pressure correlation connection is brought during filtration core, these data can change with the use of filter core, also
Filter core efficiency objective can be reacted, therefore the pressure data that can be associated for filter core is analyzed to reach detection filter core effect
The purpose of energy.More specifically, in one embodiment, the pressure data can be the ballast data (weight data) of filter core.
When the circulating direction of the air-flow is to tend to horizontal direction substantially, the ballast data for gathering filter core are particularly advantageous, and this will
It is described in detail below.In another embodiment, the pressure data can be that filter core has filtered barometric information in path,
Path is wherein filtered and has referred to direction with air-flow, the path of the part air flue after filter element filtering, this also will be under
Face describes in detail.
The pressure measurement cell 10 can use different surveys according to the difference for the pressure data for characterizing filter core efficiency
Element is measured, can be resistance strain type sensor, piezoelectric transducer, piezomagnetic sensing when measuring ballast/weight data
Device, capacitance type sensor or gyro gauge-type sensor or the mutual any combination of these sensors.In measurement gas
Can be pressure sensor when pressing data, such as differential pressure pick-up, difference sensor or absolute pressure sensor, these can root
Selected according to needs.
Computing unit 20, based on being carried out according to the pressure data and corresponding to the reference data of the pressure data
Calculate, obtain relative data.The computing unit 20 need to utilize the reference data corresponding with the pressure data gathered to calculate institute
State relative data.Herein, the implication of " reference data for corresponding to the pressure data " refers to the property of the pressure data with being gathered
Matter is consistent reference data with type.For example, when the pressure data gathered is the weight data of filter core, the reference number
According to the initial weight data that can be filter core；When the pressure data gathered is the barometric information for having filtered path, the ginseng
It can not filter the barometric information of path to examine data, and the path that do not filter refers to direction with air-flow, without filter core
The path of the part air flue of filtering；Similarly, it is the associated other kinds of pressure of filter core in the pressure data gathered
During data, the data of the type can be set as reference data.
Therefore, can obtain, the reference data can be a fixed value, such as the initial weight data of filter core；
It can be the data for needing to measure by other measuring cell, such as not filter the barometric information of air flue.It is therefore preferable that
Ground, described device can also include a memory cell (not shown), and for storing the reference data value, this is in the reference number
According to being particularly advantageously when being a fixed value.It is highly preferred that described device can also include another reference data measuring unit, use
In measurement reference data, this is particularly advantageously when reference data is the changing value that need to be measured in real time.
Typically, it is described to be calculated as mathematic interpolation, that is, calculate the difference between the pressure data and corresponding reference data
Value, so as to obtain relative data.For example, it is that the weight data of filter core, the reference data are filters in the pressure data gathered
During the initial weight data of core, the relative data is the weightening data of filter core；It is to have filtered in the pressure data gathered
The barometric information of path, the reference data are when not filtering the barometric information of air flue, and the relative data is filter core both sides
Air pressure difference.Similarly, when the pressure data gathered is the associated other kinds of pressure data of filter core, can obtain
The difference data of the type is obtained as relative data.
Comparing unit 30, for the relative data to be obtained compared with corresponding to the specific threshold of the relative data
Comparative result is obtained, the comparative result is used to represent the filter core efficiency.Similarly, it is described " to correspond to the spy of the relative data
Determine threshold value " implication refer to that with the property of the relative data and type be consistent specific threshold.For example, in the relative number
During according to being the weightening data of filter core, index of the weightening threshold value of filter core as filter core efficiency can be set.In the relative data
When being the air pressure difference of filter core both sides, index of the threshold pressure differential of filter core as filter core efficiency can be set.Similarly, described
When relative data is other kinds of difference data, index of the threshold value of the type data as filter core efficiency can be set.
Here specific threshold can be the empirical value pre-set, and this empirical value can be according in actual applications
Change according to actual conditions.Form or curve can be formed by lot of experimental data, interpolation can be used during forming curves
Method or fitting process.After forming form or curve, can reversely it be derived corresponding to it by the minimum efficiency that can be tolerated
Data are used as preset data.Hereafter whenever measuring unit 10 measures data and obtains relative data by computing unit 20, just
By this relative data compared with specific threshold.
Especially, the comparative result of the comparing unit 30 is typically greater than, is less than or equal to.When the comparative result table
When showing that the relative data is more than specific threshold, comparing unit 30 judges that presently described filter core efficiency is unqualified；When the ratio
When relatively result represents that the relative data is less than or equal to specific threshold, comparing unit 30 judges that presently described filter core efficiency is
It is qualified.Certainly, due to the relative data of selection and the difference of specific threshold, the possible contrast of decision condition, for example, when described
When comparative result represents that the relative data is less than specific threshold, comparing unit 30 judges presently described filter core efficiency not conform to
Lattice；When the comparative result represents that the relative data is more than or equal to specific threshold, comparing unit 30 judges presently described filter
Core efficiency is qualified.These belong to the equivalent technical solutions of the present invention, are all contained within protection scope of the present invention.
In general, the sampling of single, calculating and comparative result generally might have contingency, for example, in equipment just
During unlatching, the environment in air flue is unstable, and the data of collection may can not reflect truth；Or become in accidental environment
During change, misjudgment is may result in, and the filter core efficiency result of determination provided according to the comparative result of single would generally be led
Erroneous judgement is caused, in order to avoid the generation of this problem, it is preferable that the pressure measurement cell 10, be additionally operable to predetermined sampling frequency
Rate collection characterizes the pressure data of filter core efficiency；And the comparing unit 30, it is additionally operable to when according to the number pressure sampled every time
According to the continuous n times comparative result of acquisition judge current filter core efficiency for it is unqualified when, judge the filter core efficiency to be unqualified.
Wherein described N is predetermined positive integer, such as N=5.Continuous n times comparative result can advantageously avoid single acquisition, calculate
Judged by accident with caused by comparison, so as to further improve the accuracy of detection.
Especially, described device can also include：Alarm unit 60, for judging filter core efficiency for not in comparing unit 30
Signal an alert when qualified, so as to effectively prompt user to change filter core；And/or air-blower control unit 70, it is used for
Control blower fan out of service when comparing unit 30 judges that filter core efficiency is unqualified, so as to prevent the filter core of poorly efficient energy from could not hinder
The particulate matter of gear continues to propagate in air flue by blower fan, can effectively the cleannes of lifting means, economize on resources, improve and set
Standby service efficiency.
According to another embodiment of the invention, a kind of lung ventilator is also provided, including the filter core described in previous embodiment
Efficacy detection device.
Embodiments of the invention have been described in conjunction with the accompanying above, and only offer periodic replacement in the prior art is provided and carried
The objective reaction true efficiency of filter core can be led to not by showing, cause excessively to change filter core and trigger waste or excessively using filter core draw
A kind of secondary pollution got angry, according to the present embodiment, there is provided the accurate inspection of filter core efficiency to filter core, particularly lung ventilator
Survey means, so as to easily obtain the truth of filter core efficiency.
The efficiency detection method of filter core according to another embodiment of the present invention is described below in conjunction with accompanying drawing.The present embodiment with
The upper same or similar Part Hereinafter of an embodiment will not be described in great detail.
With reference to figure 2, as illustrated, a kind of efficiency detection method of filter core, the filter core are arranged on inside air flue, the side
Method includes：Measuring process S100, the pressure data of filter core efficiency is characterized for gathering, and the pressure data passes through described for air-flow
The pressure data associated caused by filter core with filter core；Calculation procedure S200, for according to the pressure data and corresponding to this
The reference data of pressure data is calculated, and obtains relative data；Comparison step S300, for by the relative data and accordingly
It is compared in the specific threshold of the relative data to obtain comparative result, the comparative result is used to represent the filter core effect
Energy.
Wherein described step S300 also includes：When the comparative result represents that the relative data is more than specific threshold,
It is unqualified to judge presently described filter core efficiency；When the comparative result represents that the relative data is not more than specific threshold,
It is qualified to judge presently described filter core efficiency.
More specifically, the measuring process S100, is additionally operable to the pressure of predetermined sample frequency collection sign filter core efficiency
Force data；And the comparison step S300, it is additionally operable to when the continuous n times obtained according to the pressure data sampled every time compare knot
Fruit judge current filter core efficiency for it is unqualified when, judge the filter core efficiency to be unqualified.
Especially, wherein the pressure data of the sign filter core efficiency is the weight data of filter core；Wherein：The measurement step
Rapid S100, it is additionally operable to gather the weight data of the filter core；The calculation procedure S200, be additionally operable to using filter core initial weight as
Reference data, the weight difference of filter core is calculated as relative according to the weight data of the filter core and the filter core initial weight
Data.
Especially, the pressure data of the sign filter core efficiency is the barometric information along airflow direction upper filter both sides；Its
In：The measuring process S100, it is additionally operable to gather the barometric information filtered in path；Methods described also includes：Reference data
Obtaining step (not shown), filtered for gathering the barometric information not filtered in path as corresponding to described in path
Barometric information reference data；And the calculation procedure S200, it is additionally operable to filter the air pressure number in path according to
According to the air pressure difference with reference data calculating filter core both sides as relative data.
Embodiments of the invention are described in detail below in conjunction with specific example.
<Example 1>
In the present example, the pressure data for characterizing filter core efficiency is the weight data of filter core.
According to this example, the phasor measurement unit 12 as shown in figure 3, pressure measurement cell is attached most importance to.
Filter core 50 is placed in the measurement surface of weight measurement unit 12, for gathering the weight information of filter core 50.Described
When air flue is the air flue of basic horizontal, most beneficial for the placement of the weight measurement unit 12, now filter core 50 is in nature
It is lower to be located in the measuring surface of the weight measurement unit 12, and the setting of weight measurement unit 12 will not make the filtering surface of filter core
Product is adversely reduced, so as to not interfere with filter efficiency.
Weight measurement unit 12 can be resistance strain type sensor, piezoelectric transducer, piezomagnetic sensor, condenser type
Sensor or the mutual any combination of gyro gauge-type sensor or these sensors.
The computing unit, for using filter core initial weight as reference data, according to the weight data of the filter core with
And the filter core initial weight calculates the weight difference of filter core as relative data.The initial weight of the filter core can be stored in
Among one memory cell (not shown), the storage can be preset in the memory cell when equipment is dispatched from the factory, can also be with
Artificially inputted and stored by maintenance personal or user afterwards.
It is to be understood that filter core 50 has certain initial weight value in untapped state, in use for some time,
The particulate matter of a part can be adsorbed, causes weight small increase occur, the present embodiment is by detecting the increasing of filter core weight change value
Calais judges the filtering efficiency of filter core, i.e., when weight difference exceedes specific threshold, it can be understood as filter core 50 needs to change.Institute
It can be the empirical value pre-set to state specific threshold, and this empirical value can change according to actual conditions in actual applications
Become.Form or curve can be formed by lot of experimental data, interpolation method or fitting process can be used during forming curves.Shape
Into after form or curve, it is specific can reversely to derive that the data corresponding to it are used as by the minimum efficiency that can be tolerated
Threshold value.
For example, the specific threshold that can set weight difference is 1 μ g, filter core at a time increases weight relative to original state
1 μ g, i.e. weight difference are 1 μ g, are learnt by inquiring about experimental data form, and now efficiency corresponding to filter core is less than predetermined effect
Can be, it is necessary to be changed.
The graph of relation of the filtering efficiency of weight difference and filter core is as shown in figure 4, the curve map can be by fitting process
Draw.Figure 4, it is seen that this relation is similar to inversely prroportional relationship, weight difference is bigger, and the filtering efficiency of filter core 50 is got over
It is small, when this weight difference is reduced to a stable value, it can be understood as filter core 50 needs to change.
<Example 2>
In the present example, the pressure data for characterizing filter core efficiency is the barometric information along airflow direction upper filter both sides.
According to this example, as shown in figure 5, the pressure measurement cell is the first barometric surveying unit 14, mistake is arranged on
The first barometric surveying unit in path is filtered, for gathering the barometric information filtered in path.
Described device also includes being arranged on the second barometric surveying unit 16 not filtered in path, is not filtered for collection logical
Barometric information in road is supplied to the calculating single as corresponding to the reference data for having filtered the barometric information in path
Member.
The computing unit 20, for having filtered barometric information and reference data calculating filter in path according to
The air pressure difference of core both sides is as relative data.
Although in the present example, employ two barometric surveying units (14,16), one of ordinary skill in the art
It should be understood that some sensors in the prior art be present has two measuring units in itself, therefore can be only using a biography
Sensor can measures pressure difference value, but other sensors only have a measuring unit, it is therefore desirable to two similar biographies
Sensor can just measure pressure difference value, and these can be selected as needed, it is impossible to be construed as limiting the invention.
First barometric surveying unit 14 and the second barometric surveying unit 16 can be differential pressure pick-up, difference sensor or exhausted
Pressure sensor.
The graph of relation of the filtering efficiency of air pressure difference and filter core is as shown in fig. 6, the curve map can be by fitting process
Draw.From fig. 6 it can be seen that this relation is similar to inversely prroportional relationship, pressure difference value is relevant with many factors, such as air
Flowing velocity, airway diameter, air inlet pipe and outlet length of tube, gas density, the filtration coefficient etc. of filter core.It can generally recognize
For pressure differential is bigger, then the filtering efficiency of filter core is smaller, (the certain threshold when this air pressure difference is reduced to a stable value
Value), it can be understood as filter core 50 needs to change.
For example, the difference for the pressure that the first barometric surveying unit measures the both sides of filter core 50 with the second barometric surveying unit is
0.003N, learnt by inquiring about experimental data form, now corresponding filter core efficiency is less than predetermined threshold value, and filter core needs to carry out
Change.
Foregoing device can be included among lung ventilator.In actual applications, it is necessary to using lung ventilator patient often
It is higher to air quality requirements, therefore the efficacy detection device of filter core provided by the invention can be preferably applied to lung ventilator and work as
In.
It will be appreciated by those skilled in the art that said apparatus can be realized by various modes.For example, finger can be passed through
Configuration processor is made to realize said apparatus.For example, instruction can be stored in ROM, and when starting the device, will instruct
Read from ROM in programming device to realize said apparatus.For example, said apparatus can be cured to dedicated devices (such as
ASIC in).Said apparatus can be divided into separate unit, or they can be merged to realization.Above-mentioned dress
Putting can be realized by one kind in above-mentioned various implementations, or can pass through two kinds in above-mentioned various implementations
Or more the combination of kind mode realize.To those skilled in the art, these embodiments are all of equal value.
It is well known by those skilled in the art that the development of the electronic information technology with such as large scale integrated circuit technology
With the trend of hardware and software, clearly to divide computer system soft and hardware boundary and seem relatively difficult.Because appoint
What operation can realize with software, can also be by that should realize.The execution of any instruction can be completed by hardware, equally also may be used
To be completed by software.Hardware implementations or software implement scheme are used for a certain machine function, depending on price, speed
The Non-technical factors such as degree, reliability, memory capacity, change cycle.Therefore, for the ordinary skill of electronic information technical field
For personnel, mode more direct and that a technical scheme is explicitly described is to describe each operation in the program.Knowing
In the case of road institute operation to be performed, those skilled in the art can directly be set based on the consideration to the Non-technical factor
Count out desired product.
Although some specific embodiments of the present invention are described in detail by example, the skill of this area
Art personnel it should be understood that example above merely to illustrating, the scope being not intended to be limiting of the invention.The skill of this area
Art personnel to above example it should be understood that can modify without departing from the scope and spirit of the present invention.This hair
Bright scope is defined by the following claims.
Claims (11)
1. a kind of efficacy detection device for being used to breathe the filter core of machine equipment, the filter core are arranged on inside air flue, its feature exists
In described device includes：
Pressure measurement cell, the pressure data of filter core efficiency is characterized for gathering, and the pressure data is that air-flow passes through the filter
The pressure data associated caused by core with filter core；
Computing unit, for being calculated according to the pressure data and corresponding to the reference data of the pressure data, obtain
Relative data；
Comparing unit, for the relative data to be compared compared with corresponding to the specific threshold of the relative data
As a result, the comparative result is used to represent the filter core efficiency；
Air-blower control unit, for controlling blower fan out of service when comparing unit judges that filter core efficiency is unqualified.
2. device according to claim 1, it is characterised in that the comparing unit is additionally operable to：
When the comparative result represents that the relative data is more than specific threshold, presently described filter core efficiency is judged not conform to
Lattice；
When the comparative result represents that the relative data is less than or equal to specific threshold, presently described filter core efficiency is judged
To be qualified.
3. device according to claim 1 or 2, it is characterised in that
The pressure measurement cell, it is additionally operable to the predetermined sample frequency collection pressure data for characterizing filter core efficiency；
The comparing unit, it is additionally operable to when the continuous n times comparative result obtained according to the pressure data sampled every time judges to work as
When preceding filter core efficiency is unqualified, it is unqualified to judge the filter core efficiency.
4. device according to claim 1, it is characterised in that the wherein described pressure data for characterizing filter core efficiency is filter core
Weight data；
The pressure measurement cell includes：Weight measurement unit, the filter core are placed in the measurement surface of the weight measurement unit
On, for gathering the weight data of the filter core；
The computing unit, for using filter core initial weight as reference data, according to the weight data of the filter core and institute
State filter core initial weight and calculate the weight difference of filter core as relative data.
5. device according to claim 1, it is characterised in that the wherein described pressure data for characterizing filter core efficiency is along gas
Flow the barometric information of direction upper filter both sides；
Described device also includes being arranged on the second barometric surveying unit not filtered in path；
The pressure measurement cell includes：The the first barometric surveying unit filtered in path is arranged on, has been filtered for gathering
Barometric information in path；
The second barometric surveying unit is logical as having been filtered corresponding to described in for gathering the barometric information not filtered in path
The reference data of barometric information in road is supplied to the computing unit；
The computing unit, for having filtered barometric information and reference data calculating filter core both sides in path according to
Air pressure difference as relative data.
6. device according to claim 3, it is characterised in that described device also includes：
Alarm unit, for the signal an alert when comparing unit judges that filter core efficiency is unqualified.
7. a kind of efficiency detection method for being used to breathe the filter core of machine equipment, the filter core are arranged on inside air flue, its feature exists
In, including：
Measuring process, the pressure data of filter core efficiency is characterized for gathering, and the pressure data is that air-flow is led by the filter core
The pressure data associated with filter core caused；
Calculation procedure, for being calculated according to the pressure data and corresponding to the reference data of the pressure data, obtain
Relative data；
Comparison step, for the relative data to be compared compared with corresponding to the specific threshold of the relative data
As a result, the comparative result is used to represent the filter core efficiency；
Rate-determining steps, for controlling blower fan out of service when the filter core efficiency is unqualified.
8. according to the method for claim 7, it is characterised in that the comparison step also includes：
When the comparative result represents that the relative data is more than specific threshold, presently described filter core efficiency is judged not conform to
Lattice；
When the comparative result represents that the relative data is less than or equal to specific threshold, judge that presently described filter core efficiency is
It is qualified.
9. the method according to claim 7 or 8, it is characterised in that wherein：
The measuring process, it is additionally operable to the predetermined sample frequency collection pressure data for characterizing filter core efficiency；
The comparison step, it is additionally operable to when the continuous n times comparative result obtained according to the pressure data sampled every time judges to work as
When preceding filter core efficiency is unqualified, it is unqualified to judge the filter core efficiency.
10. according to the method for claim 7, it is characterised in that the wherein described pressure data for characterizing filter core efficiency is filter
The weight data of core；Wherein：
The measuring process, it is additionally operable to gather the weight data of the filter core；
The calculation procedure, be additionally operable to using filter core initial weight as reference data, according to the weight data of the filter core and
The filter core initial weight calculates the weight difference of filter core as relative data.
11. according to the method for claim 7, it is characterised in that the wherein described pressure data for characterizing filter core efficiency is edge
The barometric information of airflow direction upper filter both sides；Wherein：
The measuring process, it is additionally operable to gather the barometric information filtered in path；
Methods described also includes：
Reference data obtaining step, filtered for gathering the barometric information not filtered in path as corresponding to described in path
Barometric information reference data；And
The calculation procedure, the barometric information and the reference data for being additionally operable to filter according in path calculate filter core two
The air pressure difference of side is as relative data.
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| CN106620979B (en) * | 2016-12-29 | 2019-09-17 | 天津怡和嘉业医疗科技有限公司 | A kind of ventilator control method and device |
| CN108458841A (en) * | 2017-02-22 | 2018-08-28 | 北京小米移动软件有限公司 | The detection method and device of mask |
| CN107063966A (en) * | 2017-03-28 | 2017-08-18 | 东南大学 | A kind of wireless senser of the real-time monitoring contaminated degree of air filtering core |
| WO2020000089A1 (en) * | 2018-06-25 | 2020-01-02 | DRAM Innovations Inc. | Air filter apparatus, system and method |
| EP4249029A3 (en) | 2018-10-26 | 2023-11-15 | BMC Medical Co., Ltd. | Humidification assembly |
| CN109349921B (en) * | 2018-11-09 | 2021-04-13 | 青岛歌尔微电子研究院有限公司 | Detection structure and control method for internal air pressure of electric pressure cooker and electric pressure cooker |
| CN109939505B (en) * | 2019-04-19 | 2021-09-17 | 广西扬翔股份有限公司 | Control method of flushing system and flushing system |
| CN112915412A (en) * | 2021-02-27 | 2021-06-08 | 程辉君 | Removable filter core prevent haze gauze mask |
| CN113433025A (en) * | 2021-06-09 | 2021-09-24 | 华帝股份有限公司 | Management method and system for automatically updating filter element |
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| CN101601951A (en) * | 2009-07-03 | 2009-12-16 | 奇瑞汽车股份有限公司 | A kind of air filter replacement alarm system for automotive air conditioner |
| DE102011051384A1 (en) * | 2011-06-28 | 2013-01-03 | FAUDI Aviation GmbH | Method for monitoring operability of fluid-flow filter elements, involves selecting correction factor based on measured flow rate from group predetermined correction factors, and outputting corrected differential pressure |
| CN103801037B (en) * | 2014-01-24 | 2016-05-11 | 深圳市安保科技有限公司 | A kind of portable respiration device |
| CN104266324A (en) * | 2014-10-15 | 2015-01-07 | 北京雷克利达机电股份有限公司 | System and method capable of reminding user to replace fresh air haze removal machine HEPA (High Efficiency Particulate Air) filter |
| CN204446854U (en) * | 2015-01-09 | 2015-07-08 | 北京怡和嘉业医疗科技有限公司 | A kind of respirator and humidifier |
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Address after: 100036 Beijing city Haidian District Fuchengmen Road No. 115 affluent office building block A No. 110 Applicant after: Beijing Ka Yip Yee medical Polytron Technologies Inc Address before: 100036 Beijing city Haidian District Fuchengmen Road No. 115 affluent office building block A No. 110 Applicant before: Beijing delightful harmony Jia Ye medical science and technology company limited |
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Effective date of registration: 20191101 Address after: 100036, No. 115, Fu Lou, No. 110, Fu Cheng Road, Beijing, Haidian District, A Co-patentee after: TIANJIN YIHE JIAYE MEDICAL TECHNOLOGY CO., LTD. Patentee after: Beijing Ka Yip Yee medical Polytron Technologies Inc Address before: 100036, No. 115, Fu Lou, No. 110, Fu Cheng Road, Beijing, Haidian District, A Patentee before: Beijing Ka Yip Yee medical Polytron Technologies Inc |