CN108120798A - Sensor device, air purifier and gas measuring method - Google Patents
Sensor device, air purifier and gas measuring method Download PDFInfo
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- CN108120798A CN108120798A CN201611063318.XA CN201611063318A CN108120798A CN 108120798 A CN108120798 A CN 108120798A CN 201611063318 A CN201611063318 A CN 201611063318A CN 108120798 A CN108120798 A CN 108120798A
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Abstract
The invention discloses a kind of sensor device, air purifier and gas measuring method, which includes：Chamber is measured, air inlet and gas outlet are provided on the measurement chamber；For inputting the first inlet channel of reference gas, first inlet channel can be connected with the air inlet；The gas conveying control device being connected with the measurement chamber；The sensor of the measurement intracavitary is arranged on, tested gas can enter the measurement chamber by the air inlet or gas outlet；The controller that can be electrically connected with the sensor and gas conveying control device.Sensor device provided by the invention, air purifier and gas measuring method, can overcome the problems, such as zero migration, so as to obtain accurate gas measurement.
Description
Technical field
The present invention relates to field of gas detection, more particularly to a kind of sensor device, air purifier and gasmetry side
Method.
Background technology
At present, researcher studies to indoor air quality, and all interiors that usually sampling analysis is obtained can
Important finger of the summation of volatile organic matter (VOC Volatile Organic Compound) as evaluation indoor air quality
Mark.Wherein, various measured VOC are generically and collectively referred to as volatile total organic matter (TVOC Total Volatile Organic
Compound), including：All C-H compounds such as alcohol, aldehyde, benzene, ketone and alkane.
Mainly include three classes sensor for the measurement of TVOC, be respectively PID (Photo Ionization
Detectors), electrochemical sensor and semiconductor transducer.Wherein, PID has preferable accuracy and sensitivity, but cost compared with
The high and service life is shorter.Sensitivity more smaller than national standard is also not achieved in the sensor of electrochemistry at present.Semiconductor transducer cost compared with
It is low to last a long time, but there are problems that long term bias.
Therefore, it is necessary to be improved for the relatively low semiconductor transducer lasted a long time of cost, can overcome partially
Shifting problem, so as to obtain accurate, preferable VOC measured values.
The content of the invention
The object of the present invention is to provide a kind of sensor device, air purifier and gas measuring methods, can overcome partially
Shifting problem so as to obtain accurate, preferable gas measurement, improves user experience.
Following technical proposal can be used to realize in the above-mentioned purpose of the present invention：
A kind of sensor device, including：
Chamber is measured, air inlet and gas outlet are provided on the measurement chamber；
For inputting the first inlet channel of reference gas, first inlet channel can be connected with the air inlet；
The gas conveying control device being connected with the measurement chamber；
The sensor of the measurement intracavitary is arranged on, tested gas can enter the survey by the air inlet or gas outlet
Measure chamber；
The controller that can be electrically connected with the sensor and gas conveying control device.
Further, the sensor is used to obtain corresponding first signal of the reference gas and tested gas pair respectively
The secondary signal answered；
Correspondingly, the controller is used for the order that the reference gas and tested gas is controlled to be connected with the measurement chamber
And the time, and based on the zero point of the first signal and the second signal correction sensor, and determine the index of tested gas.
Further, it is provided with to remove by non-alcohols gas componant in conveying gas on first inlet channel
Filter mechanism.
Further, the material of the filter mechanism includes：
One or more groups in absorbent charcoal material, catalysis material, oxidizer materials and filtering element for air purifier material
It closes.
Further, further include：For inputting the second inlet channel of tested gas, second inlet channel can be with institute
Air inlet is stated to be connected.
Further, the first switching device being electrically connected with the controller is further included,
First inlet channel has the first opposite import and first outlet；
Second inlet channel has the second opposite import and second outlet；
The first outlet and second outlet are intersected in first switching device, and the sensor device has opposite
First state and the second state,
In the first state, first switching device opens the first outlet and closes the second outlet, at this time
Intracavitary gas for reference can be measured to described by first inlet channel；
In the second condition, first switching device opens the second outlet and closes the first outlet, at this time
It can be to the measurement intracavitary for tested gas by second inlet channel.
Further, first inlet channel and the second inlet channel close to the position of the measurement chamber air inlet extremely
There is part public passage less, the gas conveying control device is arranged on the public passage.
Further, the gas conveying control device is arranged on the pipeline connected with the gas outlet of the measurement chamber.
Further, the filter mechanism has the first volume, and the measurement chamber has the second volume, first volume
More than second volume.
Further, it is described measurement intracavitary set sensor include first sensor and second sensor, described first
Sensor is different to the response coefficient of alcohols from the second sensor.
Further, the controller is provided with storage unit, and the memory cell is contained for zero correction
First correspondence, the controller can determine wave according to the signal that the sensor obtains based on first correspondence
The absolute concentration value of hair property total organic matter.
Further, second be electrically connected with the controller is additionally provided in the gas outlet position of the measurement chamber to cut
Changing device, second switching device are used to control the opening and closing of the gas outlet.
Further, the reference gas include it is following in any one：
Zero gas, the gas of air purifier output.
A kind of air purifier, including：Any of the above-described sensor device.
Further, the air purifier has the outlet for outwards exporting filtered air, the outlet
It is connected with first inlet channel.
Further, the air purifier is provided with primary filter core, the communicating downstream of the primary filter core have second into
Gas passage, tested gas can enter second inlet channel after the primary filter core.
Further, the sensor device further includes the 3rd inlet channel, described 3rd inlet channel one end with it is described
The outlet of air purifier is connected, and the other end is connected with the measurement chamber.
A kind of gas measuring method, including：
To measurement intracavitary injection reference gas, after the first predetermined time, the gas outlet of the measurement chamber is closed, and is stopped
Reference gas only is injected to the measurement intracavitary, obtains the first signal of sensor, and according to the first signal acquisition sensor
Zero point；
The gas outlet of the measurement chamber is opened, to the tested gas of measurement intracavitary injection, after the second predetermined time, is obtained
The secondary signal of sensor；
Zero point and secondary signal based on the sensor determine the index of tested gas.
Further, the method further includes：
The step of being spaced the predetermined time, repeating the zero point of above-mentioned acquisition sensor.
Further, the method further includes：
Judge whether the index of the tested gas needs to meet pre-provisioning request；
If not satisfied, the step of then repeating the zero point of above-mentioned acquisition sensor.
Further, the method further includes：
Judge whether the index of the tested gas needs to meet pre-provisioning request；
If satisfied, it then keeps, to the tested gas of measurement intracavitary injection, measuring.
Further, the pre-provisioning request is：
The index of the tested gas is within predetermined interval scope.
Further, the method further includes：
The index of gas is tested described in periodic statistics；
Index according to gas is tested in a cycle determines the indication range of the tested gas；
The pre-provisioning request is determined according to the indication range of the definite tested gas.
A kind of gas measuring method, including：
Start gas conveying control device, by the first switching device open the first inlet channel, by described first into
Gas passage is to measurement intracavitary injection reference gas, after the first predetermined time, closes the measurement gas outlet of chamber and described
Gas conveying control device stops to the measurement intracavitary injection reference gas, obtains the first signal of sensor, and according to the
The zero point of one signal acquisition sensor；
The gas outlet of the measurement chamber and the gas conveying control device are opened, the is switched to by the first switching device
Two inlet channels by second inlet channel to the tested gas of measurement intracavitary injection, after the second predetermined time, obtain
The secondary signal of sensor；
Zero point and secondary signal based on the sensor determine the index of tested gas.
A kind of gas measuring method, including：
To measurement chamber injection reference gas, corresponding first subsignal of first sensor, second sensor pair are obtained respectively
The second subsignal answered；
To the tested gas of measurement chamber injection, corresponding 3rd subsignal of first sensor, second sensor pair are obtained respectively
The 4th subsignal answered；
Based on first subsignal, the second subsignal, the 3rd subsignal and the 4th subsignal, substitute into dual sensor and correspond to
Relation determines the index of tested gas.
The technical solution provided by more than the application embodiment is as it can be seen that sensor device is provided with and measures in the application
The controller that sensor and gas conveying control device in chamber are electrically connected controls the reference gas by the controller
The order connected with tested gas with the measurement chamber and time, it is corresponding that the reference gas that sensor measures is obtained respectively
First signal and the corresponding secondary signal of tested gas are then based on the zero point of sensor described in first signal correction, so
Determine the index of the tested gas with reference to the secondary signal based on the zero point of correction afterwards.In measurement process, by passing through
Stating reference gas realizes zero correction, therefore can overcome offset problem, so as to obtain accurate, preferable VOC measured values, carries
High user experience.
Description of the drawings
Fig. 1 is the structure diagram for the sensor device that one embodiment of the application provides；
Fig. 2 is the structure diagram for the sensor device that one embodiment of the application provides；
Fig. 3 is the structure diagram for the sensor device that one embodiment of the application provides；
Fig. 4 is the step flow chart for the gas measuring method that one embodiment of the application provides；
Fig. 5 is the step flow chart for the gas measuring method that one embodiment of the application provides；
Fig. 6 is the step flow chart for the gas measuring method that one embodiment of the application provides；
Fig. 7 is the step flow chart for the gas measuring method that one embodiment of the application provides；
Fig. 8 is the step flow chart for the gas measuring method that one embodiment of the application provides；
Fig. 9 is the step flow chart for the gas measuring method that one embodiment of the application provides.
Reference sign：
Measure chamber -1；Air inlet -11；Gas outlet -12；Public passage -13；Gas conveying control device -2；First air inlet
Passage -3；Filter mechanism -4；Sensor -5；Controller -6；First sensor-S1；Second sensor-S2；Second inlet channel-
7；First switching device -8, the, three inlet channel -9.
Specific embodiment
It below in conjunction with the drawings and specific embodiments, elaborates to technical scheme, it should be understood that these realities
Example is applied to be only illustrative of the invention and is not intended to limit the scope of the invention, after the present invention has been read, people in the art
Member each falls in the application scope as defined in the appended claims the modification of the various equivalent forms of the present invention.
It should be noted that when element is referred to as " being arranged at " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " on ",
" under ", "left", "right" and similar statement for illustrative purposes only, it is unique embodiment to be not offered as.
Unless otherwise defined, all of technologies and scientific terms used here by the article and the technical field of the application is belonged to
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.
The present invention provides a kind of sensor device, air purifier and gas measuring method, zero migration can be overcome to ask
Topic, so as to obtain accurate, preferable volatile total organic matter (TVOC) measured value, improves user experience.
It please refers to Fig.1 and Fig. 2, a kind of sensor device provided in the application embodiment can include：Chamber 1 is measured,
Air inlet 11 and gas outlet 12 are provided on the measurement chamber 1；For inputting the first inlet channel 3 of reference gas, described
One inlet channel 3 can be connected with the air inlet 11；The gas conveying control device 2 being connected with the measurement chamber 1；It sets
Sensor 5 in the measurement chamber 1 corresponds to for obtaining corresponding first signal of the reference gas and tested gas respectively
Secondary signal；Wherein, the tested gas can measure chamber 1 by the air inlet 11 or gas outlet 12 into described；It can be with
The controller 6 that the sensor 5 and gas conveying control device 2 are electrically connected is used to control the reference gas and be tested
The order and time that gas is connected with the measurement chamber 1, and correct the sensor 5 based on the first signal and the second signal
Zero point, and determine the index of tested gas.
In the present embodiment, the measurement chamber 1 can be relatively closed miniature cavities, the inside of the measurement chamber 1
It is provided with the sensor 5 of detection gas.Opposite air inlet 11 and gas outlet 12 are provided on the measurement chamber 1, gas can
To be measured by the air inlet 11 into described in chamber 1, after flowing through sensor 5, flowed out from the gas outlet 12.For example, institute
It can be a rectangular box to state measurement chamber 1, and internal capacity can meet 5 installation requirements of sensor and gasmetry needs.
Certainly, the concrete shape of the measurement chamber 1 and volume size can make corresponding setting according to actual measurement demand, and the application exists
This is not limited specifically.
In the present embodiment, the sensor 5 can be semiconductor transducer 5, can be used for obtaining the dense of TVOC
Spend signal.Specifically, the number of the sensor 5 can be one, or two and more than, the application does not make herein
It is specific to limit.Can be first sensor S1 and second sensor S2 respectively when the number of the sensor 5 is two,
The first sensor S1 and the second sensor S2 are different to the response coefficient of alcohols.
In the present embodiment, first inlet channel 3 can be connected with the air inlet 11 of the measurement chamber 1.With reference to
Gas can be flowed by first inlet channel 3 in the measurement chamber 1.Wherein, can be set on first inlet channel 3
It is equipped with to remove by the filter mechanism 4 of non-alcohols gas componant in conveying gas.
In the present embodiment, the gas conveying control device 2 is used to provide the power of flowing for gas.Specifically,
The form of the gas conveying control device 2 can be air pump, and certainly, the gas conveying control device 2 can also be other
Form, the application do not make specific limit herein.In addition, the design parameter of the gas conveying control device 2 can also root
Factually the throughput on border needs to carry out to select and set accordingly, and the application does not make specific limit herein.The gas is defeated
Control device 2 is sent to be connected with the measurement chamber 1, specifically, the gas conveying control device 2 can be arranged on the measurement
The upstream of the import of chamber 1 can also be arranged on the downstream of the outlet of the measurement chamber 1.At the gas conveying control device 2
When opening, air-flow can be flowed into from the import of the measurement chamber 1, after flowing through the measurement chamber 1, from the measurement chamber 1
Outlet outflow.
In the present embodiment, the controller 6 can be electrically connected with the gas conveying control device 2, so as to control
Make the opening and closing of the gas conveying control device 2.In addition, the controller 6 can be electrically connected with the sensor 5, so as to
Obtain the signal that the sensor 5 obtains.It further, can be based on the accurate quilt of signal acquisition that the sensor 5 obtains
Survey the index of gas.Wherein, the concrete mode of the electric connection can include wired connection and wireless connection or both
With reference to etc., specific the application does not make specific limit herein.The index of the tested gas can be used to indicate that tested gas
Body specifies ingredient, such as the concentration of VOC.Specifically, the form of the index can be analog signal or number
Signal when the form of the index is analog signal, can be converted by D/A converter module, can so as to obtain
The digital signal being read by a user.
In the present embodiment, when the controller 6 works, can control the reference gas and tested gas with it is described
Order and the time that chamber 1 connects are measured, corresponding first signal of the reference gas and be tested that acquisition sensor 5 measures respectively
The corresponding secondary signal of gas is then based on the zero point of sensor 5 described in first signal correction, is then based on the zero of correction
Point determines the index of the tested gas with reference to the secondary signal.
In the present embodiment, the reference gas can include it is following in any one：Zero gas, air purifier are defeated
The gas gone out.Wherein, zero gas refers to the gas of adjustment gas analyzer minimum scale, when which enters analyzer, analysis
Instrument is shown as zero.Specifically, zero gas can be High Purity Nitrogen or clean air without ingredient to be measured etc., certainly, zero gas is also
Can be other gases, the application does not make specific limit herein.The tested gas can be indoor air to be measured.When
So, the tested gas can not also make specific limit herein according to the different and different of the demand actually measured, the application
It is fixed.
The sensor device provided in the application embodiment is provided with and is conveyed with the sensor 5 in measurement chamber 1 and gas
The controller 6 that control device 2 is electrically connected controls the reference gas and tested gas and the survey by the controller 6
Order and the time that chamber 1 connects are measured, obtains corresponding first signal of the reference gas and tested gas that sensor 5 measures respectively
The corresponding secondary signal of body is then based on the zero point of sensor 5 described in first signal correction, is then based on the zero point of correction
The index of the tested gas is determined with reference to the secondary signal.In measurement process, due to being realized by the reference gas
Zero correction, therefore offset problem can be overcome, so as to obtain accurate, preferable VOC measured values, improve user experience.
Generally, since current TVOC includes all C-H compounds such as alcohol, aldehyde, benzene, ketone, alkane.Wherein, alcohols object
Matter is inevitably present in family, and when being included in culinary cuisine and drinks, fruit based food etc. can be generated and waved
It issues.Along with alcohols material toxicity itself is relatively low, harm to the human body is smaller, in Chinese indoor air pollutants standard simultaneously
Requirement is not made to alcohols material.
And it is current, often broadly by toxicity such as above-mentioned alcohols material and formaldehyde, substance is all counted into VOC indexs higher
In.When these alcohols materials are judged indoor air pollutants as one of index of VOC, the index of acquisition often to
Family causes to mislead, and causes user that cannot be accurately judged to the concentration of indoor pollutant, can not particularly judge to human toxicity compared with
Whether the substances such as high formaldehyde are exceeded, therefore cannot meet the needs of users.
In order to exclude influence of the alcohols material to TVOC, the scheme of being implemented as follows is further provided in this application.
Referring to Fig. 1, it in one embodiment, is provided with to remove by conveying gas on first inlet channel 3
The filter mechanism 4 of non-alcohols gas componant in body.
In the present embodiment, by setting to remove non-alcohols in conveying gas on first inlet channel 3
It, can be by the non-alcohols gas componant in the reference gas for entering first inlet channel 3 after the filter mechanism 4 of gas componant
Thoroughly removal obtains the reference gas of removal non-alcohols gas componant.When the non-alcohols gas componant in the reference gas is thorough
When after the removal of bottom into the measurement chamber 1, the first signal that the sensor 5 inductively measures can relatively more school exactly
The zero point of positive sensor 5 can obtain the target zero point only retained after alcohols material, in order to the survey of subsequently tested gas
Alcohols material can be removed in magnitude, obtain the preferable VOC gas index of user.
In the present embodiment, the material of the filter mechanism 4 can include：Modified active Carbon Materials, catalysis material,
One or more combinations in oxidizer materials and filtering element for air purifier material, certainly, the material of the filter mechanism 4 may be used also
Think other materials and combinations thereof, one of ordinary skill in the art can also make other under the enlightenment of present techniques marrow
Change, but as long as its function for realizing and the effect that reaches are same as the present application or similar, the application protection should all be covered by
In the range of.
Specifically, the filter mechanism 4 can be a cavity being arranged on first inlet channel 3, the cavity
It is interior to be provided with above-mentioned filtering material, when the reference gas entered from first inlet channel 3 flows through the filter mechanism 4
Filtering material when, by the filtering material in the filter mechanism 4 object can occur for the non-alcohols substance in the reference gas
Reason or chemical action, so as to be removed.
In a specific embodiment, the filter mechanism 4 has the first volume, and the measurement chamber 1 has second
Volume, first volume are more than second volume.When the volume of the filter mechanism 4 is more than the volume of the measurement chamber 1
When, it can ensure through the non-alcohols substance in the first inlet channel 3 entrance reference gas for measuring chamber 1 thoroughly
It is removed by the filter mechanism 4, so as to ensure that the first signal that the sensor 5 inductively measures can relatively more exactly
The zero point of sensor 5 is corrected, the target zero point only retained after alcohols material can be obtained, in order to subsequently tested gas
Alcohols material can be removed in measured value, obtain the preferable VOC gas index of user.
Referring to Fig. 1, in one embodiment, the sensor device can also include：For inputting tested gas
The second inlet channel 7, second inlet channel 7 can be connected with the air inlet 11.
In the present embodiment, second inlet channel 7 can be connected with the air inlet 11 of the measurement chamber 1, be used for
To the tested gas of measurement chamber 1 input.Specifically, the tested gas can be indoor air to be measured.
Further, the sensor device can also include the first switching device being electrically connected with the controller 6
8, first inlet channel 3 has the first opposite import and first outlet；Second inlet channel 7 has opposite the
Two imports and second outlet；The first outlet and second outlet are intersected in first switching device 8, the sensor device
With opposite first state and the second state, in the first state, first switching device 8 opens the first outlet simultaneously
Close the second outlet, at this time by first inlet channel 3 can into the measurement chamber 1 gas for reference；Second
Under state, first switching device 8 opens the second outlet and closes the first outlet, at this time by described second into
Gas passage 7 can be into the measurement chamber 1 for tested gas.
Wherein, first switching device 8 can be electrically connected with the controller 6, for controlling first air inlet
The order that passage 3, the second inlet channel 7 are connected with the measurement chamber 1.Specifically, the form of first switching device 8 can be with
Valve in order to control can control first inlet channel 3, the break-make of the second inlet channel 7.
In addition, the first air inlet of reference gas is led to referring to Fig. 2, the sensor device can be provided only with to circulate
Road 3, the tested gas can be measured into described inside chamber 1 by the gas outlet 12 of the measurement chamber 1.When the actual room of test
During interior gas TVOC, the first inlet channel 3 can be closed, indoor gas freely expands via the gas outlet 12 on the measurement chamber 1
It is dissipated in measurement chamber 1, then sensor 5 provides corresponding readings according to the gas concentration in measurement chamber 1.
In a specific embodiment, 3 and second inlet channel 7 of the first inlet channel is close to the measurement
The position of 1 air inlet 11 of chamber at least has part public passage 13, and the gas conveying control device 2 is arranged on described public logical
On road 13.When 3 and second inlet channel 7 of the first inlet channel has close to the position of measurement 1 air inlet 11 of chamber
During public passage 13,11 numbers of air inlet of the measurement chamber 1 can be with for one, correspondingly, first inlet channel 3 and the
The duct length of two inlet channels 7 can be contracted by, so as to be conducive to the reduction of sensor device cost.
Further, when the gas conveying control device 2 is arranged on the public passage 13, likewise, its
Number can be only one can be realized by the gas in the first inlet channel 3 or the second inlet channel 7 be pumped into it is described measurement chamber 1
It is interior.
Referring to Fig. 1, in addition, the gas conveying control device 2 can also be arranged on the outlet company with the measurement chamber 1
On logical pipeline.When the gas conveying control device 2 is arranged on on the pipeline of the outlet of the measurement chamber 1, it is
The sensor device provides the power of gas circulation, likewise, its number, which can be only one, can meet the sensor
The power demand of device gas flowing.
Referring to Fig. 2, in another embodiment, the sensor 5 set in the measurement chamber 1 can include first and pass
Sensor S1 and second sensor S2, the first sensor S1 and the second sensor S2 are different to the response coefficient of alcohols.
In the present embodiment, the number of the sensor 5 can be two, be respectively that first sensor S1 and second is passed
Sensor S2, also, the first sensor S1 and second sensor S2 is different to the response coefficient of alcohols, so as to according to institute
The signal of first sensor S1, second sensor S2 acquisition is stated based on predetermined correspondence, by alcohols material from TVOC indexs
Middle rejecting, so as to obtain the preferable TVOC indexs of user.
Specifically, the controller 6 can be provided with storage unit, the memory cell is contained for zero correction
The first correspondence, the controller 6 can according to the sensor 5 obtain signal be determined based on first correspondence
The absolute concentration value of VOC.Wherein, first correspondence can be dual sensor correspondence, based on the dual sensor pair
It should be related to, the gas obtained by the different sensor of at least two pairs of alcohols response coefficients in test process and correction course is dense
Signal is spent, can determine the calculating concentration of VOC and the calculating concentration of alcohols gas respectively.With first sensor S1, the second sensing
Exemplified by device S2, the dual sensor correspondence is specifically as follows：Based on first sensor S1, second sensor S2 was being measured
The signal of the expression gas concentration obtained in journey, correction course and each different response slopes to designated gas classification and finger
Determine the other correspondence between calculating concentration of gas class.The designated gas classification can include：Toluene is the calculating of the VOC of representative
Concentration, methanol are calculating concentration of alcohols of representative etc..
In addition, first correspondence can also be according to the difference of practical application scene, such as the difference of sensor etc.
And making corresponding variation, the application does not make specific limit herein.
In one embodiment, it is additionally provided in 12 position of gas outlet of the measurement chamber 1 electrical with the controller 6
Second switching device of connection, second switching device are used to control the opening and closing of the gas outlet 12.
In the present embodiment, second switching device can be electrically connected with the controller 6, described for controlling
Measure the opening and closing of the gas outlet 12 of chamber 1.Specifically, the form of second switching device can valve in order to control, certainly, may be used also
Think other forms, only need to realize the opening and closing for controlling the gas outlet 12.
The application embodiment further provides a kind of air purifier, including：Biography described in any of the above-described embodiment
Sensor arrangement.Specifically, the concrete structure composition of the sensor device and its technique effect that can be realized are referred to
The specific descriptions of embodiment are stated, details are not described herein by the application.
In the present embodiment, the air purifier has the outlet for outwards exporting filtered air, institute
Outlet is stated with first inlet channel 3 to be connected.
It, can be by first inlet channel 3 to institute when the outlet is connected with first inlet channel 3
It states in measurement chamber 1 and reference gas is persistently provided.Purified treatment of the reference gas due to passing through air purifier, in contrast,
Purity is higher, during as with reference to gas, advantageously ensures that the reliability of sensor device measurement.
In the present embodiment, the air purifier is provided with primary filter core, and the communicating downstream of the primary filter core has
Second inlet channel 7, tested gas can enter second inlet channel 7 after the primary filter core.
The tested gas, will be described tested by the primary filter core when flowing through the primary filter core of the air purifier
The larger solid impurity of bulky grain equidimension in gas filters out.When the tested gas enters institute after the primary filter core
When stating the second inlet channel 7, it is possible to prevente effectively from solid impurity deposits in second inlet channel 7, by described second
Inlet channel 7 blocks.
Referring to Fig. 3, in one embodiment, the sensor device further includes the 3rd inlet channel 9, the described 3rd
9 one end of inlet channel can be connected with the outlet of the air purifier, and the other end is connected with the measurement chamber 1.
In the present embodiment, the sensor device can be provided with the 3rd inlet channel 9, the 3rd inlet channel
9 can be used in being passed through what the outlet of air purifier was flowed out in the measurement chamber 1 by the purified air of air purifier,
It is measured by the sensor 5 in the measurement chamber 1 by the purified air quality of air purifier.Specifically, the described 3rd
One end of inlet channel 9 can be connected with the outlet of the air purifier, and the other end can be with first inlet channel
3rd, the second inlet channel 7 converges at first switching device 8, first switching device 8 is controlled by controller 6, from
And realize each inlet channel with measuring the connected relation of chamber 1.
Referring to Fig. 4, based on the sensor device provided in the application embodiment, present invention also provides a kind of gases
Measuring method.The gas measuring method may include steps of：
Step S10：To measurement intracavitary injection reference gas, after the first predetermined time, going out for the measurement chamber is closed
Gas port, and stop, to the measurement intracavitary injection reference gas, obtaining the first signal of sensor, and according to the first signal acquisition
The zero point of sensor；
Step S12：The gas outlet of the measurement chamber is opened, to the tested gas of measurement intracavitary injection, by the second pre- timing
Between after, obtain the secondary signal of sensor；
Step S14：Zero point and secondary signal based on the sensor determine the index of tested gas.
In the present embodiment, the sensor device, can be first to measurement intracavitary injection ginseng when carrying out actual measurement
Gas is examined, after injecting for the first predetermined time, when can ensure that the measurement intracavitary is full of reference gas, closes the measurement chamber
Gas outlet.Wherein described first predetermined time can be according to the flow velocity of the volume of the measurement chamber and the reference gas, the
The sectional area of one inlet channel determines, within first predetermined time, to the volume of the reference gas of the measurement chamber injection
More than the volume of the measurement chamber.At this point it is possible to stop to the measurement intracavitary injection reference gas, and measured using sensor
Corresponding first signal of the reference gas, the zero point based on sensor described in first signal correction.
Then, open it is described measurement chamber gas outlet, by it is described measurement chamber air inlet or gas outlet to measurement intracavitary
The tested gas of injection after the second predetermined time, that is, after ensureing that the measurement intracavitary is full of tested gas, is surveyed using sensor
The corresponding secondary signal of the tested gas is measured, the zero point of the sensor is then based on and the secondary signal determines tested gas
The TVOC indexs of body.
Due in measurement process, being corrected using reference gas to sensor zero point, eliminating alcohols material
Interference, therefore in contrast this is tested the corresponding TVOC indexs of gas accurately and reliably, it is high to the actual reference of user.
Referring to Fig. 5, the gas measuring method can also include the following steps：
Step S16：The step of being spaced the predetermined time, repeating the zero point that sensor is obtained in above-mentioned steps S10.
In the present embodiment, can be spaced the predetermined cycle is corrected the zero point of sensor device, specifically, institute
Stating the predetermined time can be set according to actual use demand and frequency, and the application does not make specific limit herein.For example,
When frequency of use is high, the predetermined time at interval can be relatively short, and when frequency of use is low, the predetermined time at interval can phase
To longer.After when automatically periodically perform above-mentioned acquisition sensor zero point the step of, it can ensure the sensing of sensor device
The zero point of device as much as possible in the preferred range, so as to be conducive to obtain with zero correction and can prevent alcohols from disturbing
High-precision TVOC indexs.
Referring to Fig. 6, in one embodiment, the gas measuring method can also include the following steps：
Step S18：Judge whether the index of the tested gas needs to meet pre-provisioning request；
Step S181：If not satisfied, in the S10 that then repeats the above steps acquisition sensor zero point the step of；
Step S182：If satisfied, it then keeps, to the tested gas of measurement intracavitary injection, measuring.
In the present embodiment, the gas measuring method can also include judging whether the index of the tested gas is full
Sufficient pre-provisioning request.Specifically, the pre-provisioning request can be：The index of the tested gas is within predetermined interval scope.One
As, it can first set out the predetermined interval scope of tested gas.Specifically, the predetermined interval scope can be according to numerical statistic
It obtains.Certainly, definite and interval range the size of the range boundary value of the specific predetermined interval can be according to actual demand
Depending on, for example, when higher to the required precision of sensor, the scope in the section can be smaller, which includes as far as possible
The intensive point of probability distribution；When the required precision of normal sensor is not relatively high, the scope in the section can be larger.
In the present embodiment, when the index of the tested gas is unsatisfactory for the pre-provisioning request, for example, tested gas
Index not when within the predetermined interval scope, can repeat obtain sensor zero point the step of, to the zero point of sensor
It is corrected.
In the present embodiment, when the index of the tested gas meets the pre-provisioning request, for example, tested gas
Index represents that the zero point of sensor does not deviate, can normally be measured at this time when within the predetermined interval scope,
So as to obtain accurate, preferable gas index.
Referring to Fig. 7, in a detailed embodiment, the gas measuring method can also include：
Step S191：The index of gas is tested described in periodic statistics；
Step S192：Index according to gas is tested in a cycle determines the indication range of the tested gas；
Step S193：The pre-provisioning request is determined according to the indication range of the definite tested gas.
In the present embodiment, the gas measuring method can also carry out periodic statistics to the index for being tested gas.
Wherein, the specific setting in the cycle can be set according to actual service condition and demand, and the application does not make herein
It is specific to limit.The index of gas is tested in a cycle by recording, it may be determined that the indication range of tested gas.When definite
After the indication range, the reference standard of tested gas can be set, that is, determines the pre-provisioning request.In present embodiment, institute
The indication range for stating the tested gas determined in the cycle can directly be the pre-provisioning request；In addition, the pre-provisioning request also may be used
It, specifically can be according to actual need to be enlarged or reduce on the basis of the indication range of the tested gas determined within the cycle
Make adaptive change, the application does not make specific limit herein.
When counting the indication range of definite tested gas in a cycle as the first indication range, in second period
The indication range of the definite tested gas of statistics is the second indication range, after the second indication range is obtained, can directly be deleted
First indication range can also be modified the second indication range using first indication range, so cycle past
Multiple, details are not described herein by the application.
Referring to Fig. 8, based on the sensor device provided in the application embodiment, present invention also provides a kind of gases
Measuring method.The gas measuring method may include steps of：
Step S11：Start gas conveying control device, the first inlet channel is opened by the first switching device, passes through institute
The first inlet channel is stated to measurement intracavitary injection reference gas, after the first predetermined time, closes the outlet of the measurement chamber
Mouth and the gas conveying control device stop, to the measurement intracavitary injection reference gas, obtaining the first signal of sensor,
And according to the zero point of the first signal acquisition sensor；
Step S13：The gas outlet of the measurement chamber and the gas conveying control device are opened, passes through the first switching device
The second inlet channel is switched to, by second inlet channel to the tested gas of measurement intracavitary injection, by the second pre- timing
Between after, obtain the secondary signal of sensor；
Step S15：Zero point and secondary signal based on the sensor determine the index of tested gas.
In the present embodiment, the sensor device can first start gas conveying control when carrying out actual measurement
Device connects the first inlet channel and measurement chamber by the first switching device, is injected by the first inlet channel to measurement intracavitary
Reference gas after injecting for the first predetermined time, when can ensure that the measurement intracavitary is full of reference gas, closes the measurement
The gas outlet of chamber and the gas conveying control device.Wherein described first predetermined time can be according to the volume of the measurement chamber
Flow velocity, the sectional area of the first inlet channel with the reference gas determine, within first predetermined time, to the measurement
The volume of the reference gas of chamber injection is more than the volume of the measurement chamber.At this point it is possible to stop to the measurement intracavitary injection ginseng
Gas is examined, and corresponding first signal of the reference gas is measured using sensor, based on biography described in first signal correction
The zero point of sensor.
Then, the gas outlet of the measurement chamber and the gas conveying control device are opened, is cut by the first switching device
The second inlet channel is shifted to, by second inlet channel to the tested gas of measurement intracavitary injection, by the second predetermined time
Afterwards, that is, after ensureing that the measurement intracavitary is full of tested gas, the corresponding secondary signal of the tested gas is measured using sensor,
It is then based on the zero point of the sensor and the secondary signal determines the TVOC indexs of tested gas.
Due in measurement process, being corrected using reference gas to sensor zero point, eliminating alcohols material
Interference, therefore in contrast this is tested the corresponding TVOC indexs of gas accurately and reliably, it is high to the actual reference of user.
Referring to Fig. 9, based on the sensor device provided in the application embodiment, present invention also provides another gas
Bulk measurement method.The gas measuring method may include steps of：
Step S20：Reference gas is injected to measurement chamber, respectively corresponding first subsignal of acquisition first sensor, second
Corresponding second subsignal of sensor；
Step S22：Gas is tested to measurement chamber injection, respectively corresponding 3rd subsignal of acquisition first sensor, second
Corresponding 4th subsignal of sensor；
Step S24：Based on first subsignal, the second subsignal, the 3rd subsignal and the 4th subsignal, double pass is substituted into
Sensor correspondence determines the index of tested gas.
In the present embodiment, can be utilized based on the different sensors principle different to the response coefficient of alcohols material
Dual sensor correspondence is corrected sensor and obtains the TVOC indexs for excluding alcohols interference.
Specifically, corresponding first subsignal of first sensor can be obtained respectively first to measurement chamber injection reference gas,
Corresponding second subsignal of second sensor.Wherein, first subsignal and the second subsignal can be used for correcting sensor
Zero point.Specifically, first subsignal can input readout when reference gas is corrected for first sensor.Institute
It can be readout when second sensor input reference gas is corrected to state the second subsignal.Then, to measurement intracavitary note
Enter tested gas, obtain corresponding 3rd subsignal of first sensor, corresponding 4th subsignal of second sensor respectively.Its
In, the 3rd subsignal can be the readout in the first sensor measurement process, and the 4th subsignal can be
Readout in the second sensor measurement process.Finally, by first subsignal, the second subsignal, the 3rd subsignal
With the 4th subsignal, dual sensor correspondence is substituted into, you can determine the index of tested gas.
Due in measurement process, being corrected using reference gas to sensor zero point, eliminating alcohols material
Interference, therefore in contrast this is tested the corresponding TVOC indexs of gas accurately and reliably, it is high to the actual reference of user.
Above-mentioned each embodiment in this specification is described by the way of progressive, identical between each embodiment
Similar portion is cross-referenced, and what each embodiment stressed is and other embodiment difference.
The foregoing is merely several embodiments of the invention, although disclosed herein embodiment as above, institute
Content is stated only to facilitate the embodiment for understanding the present invention and using, is not intended to limit the present invention.Any institute of the present invention
Belong to those skilled in the art, do not depart from disclosed herein spirit and scope on the premise of, can be in embodiment
Formal and details on make any modification and variation, but the scope of patent protection of the present invention still must be with appended claims
Subject to the scope that book is defined.
Claims (25)
1. a kind of sensor device, which is characterized in that including：
Chamber is measured, air inlet and gas outlet are provided on the measurement chamber；
For inputting the first inlet channel of reference gas, first inlet channel can be connected with the air inlet；
The gas conveying control device being connected with the measurement chamber；
The sensor of the measurement intracavitary is arranged on, tested gas can enter the measurement by the air inlet or gas outlet
Chamber；
The controller that can be electrically connected with the sensor and gas conveying control device.
2. sensor device as described in claim 1, which is characterized in that
The sensor is used to obtain corresponding first signal of the reference gas and the corresponding secondary signal of tested gas respectively；
Correspondingly, the controller be used to controlling the reference gas and tested gas with it is described measure the order that connects of chamber and when
Between, and based on the zero point of the first signal and the second signal correction sensor, and determine the index of tested gas.
3. sensor device as claimed in claim 2, which is characterized in that be provided with to remove on first inlet channel
By the filter mechanism of non-alcohols gas componant in conveying gas.
4. sensor device as claimed in claim 3, which is characterized in that the material of the filter mechanism includes：
One or more combinations in absorbent charcoal material, catalysis material, oxidizer materials and filtering element for air purifier material.
5. sensor device as claimed in claim 2, which is characterized in that further include：For input the second of tested gas into
Gas passage, second inlet channel can be connected with the air inlet.
6. sensor device as claimed in claim 5, which is characterized in that further include first be electrically connected with the controller
Switching device,
First inlet channel has the first opposite import and first outlet；
Second inlet channel has the second opposite import and second outlet；
The first outlet and second outlet are intersected in first switching device, and the sensor device has opposite first
State and the second state,
In the first state, first switching device opens the first outlet and closes the second outlet, passes through at this time
First inlet channel can measure intracavitary gas for reference to described；
In the second condition, first switching device opens the second outlet and closes the first outlet, passes through at this time
Second inlet channel can be to the measurement intracavitary for tested gas.
7. sensor device as claimed in claim 6, which is characterized in that first inlet channel and the second inlet channel exist
At least there is part public passage close to the position of the measurement chamber air inlet, the gas conveying control device is arranged on described
On public passage.
8. sensor device as claimed in claim 2, which is characterized in that the gas conveying control device be arranged on it is described
It measures on the pipeline of gas outlet connection of chamber.
9. sensor device as claimed in claim 3, which is characterized in that
The filter mechanism has the first volume, and the measurement chamber has the second volume, and first volume is more than described second
Volume.
10. the sensor device as described in claim 2 or 5, which is characterized in that
The sensor that the measurement intracavitary is set includes first sensor and second sensor, the first sensor and described the
Two sensors are different to the response coefficient of alcohols.
11. sensor device as claimed in claim 10, which is characterized in that
The controller is provided with storage unit, and the memory cell contains the first correspondence for zero correction,
The controller can determine volatile total organic matter according to the signal that the sensor obtains based on first correspondence
Absolute concentration value.
12. sensor device as claimed in claim 2, which is characterized in that
It is additionally provided with the second switching device being electrically connected with the controller in the gas outlet position of the measurement chamber, described the
Two switching devices are used to control the opening and closing of the gas outlet.
13. sensor device as described in claim 1, which is characterized in that the reference gas include it is following in it is any one
Kind：
Zero gas, the gas of air purifier output.
14. a kind of air purifier, which is characterized in that including：Sensor device as described in claim 1 to 13 is any.
15. air purifier as claimed in claim 14, which is characterized in that the air purifier has to filter
The outlet that outwards exports of air, the outlet is connected with first inlet channel.
16. air purifier as claimed in claim 14, which is characterized in that the air purifier is provided with primary filter core,
The communicating downstream of the primary filter core has the second inlet channel, and tested gas can enter described second after the primary filter core
Inlet channel.
17. air purifier as claimed in claim 14, which is characterized in that the sensor device further includes the 3rd air inlet and leads to
Road, described 3rd inlet channel one end can be connected with the outlet of the air purifier, and the other end is connected with the measurement chamber
It is logical.
18. a kind of gas measuring method, which is characterized in that including：
To measurement intracavitary injection reference gas, after the first predetermined time, close it is described measurement chamber gas outlet, and stop to
The measurement intracavitary injection reference gas obtains the first signal of sensor, and according to the zero point of the first signal acquisition sensor；
The gas outlet of the measurement chamber is opened, to the tested gas of measurement intracavitary injection, after the second predetermined time, obtains sensing
The secondary signal of device；
Zero point and secondary signal based on the sensor determine the index of tested gas.
19. method as claimed in claim 18, which is characterized in that the method further includes：
The step of being spaced the predetermined time, repeating the zero point that sensor is obtained in the claims 18.
20. method as claimed in claim 18, which is characterized in that the method further includes：
Judge whether the index of the tested gas needs to meet pre-provisioning request；
If not satisfied, the step of then repeating to obtain the zero point of sensor in the claims 18.
21. method as claimed in claim 18, which is characterized in that the method further includes：
Judge whether the index of the tested gas needs to meet pre-provisioning request；
If satisfied, it then keeps, to the tested gas of measurement intracavitary injection, measuring.
22. the method as described in claim 20 or 21, which is characterized in that the pre-provisioning request is：
The index of the tested gas is within predetermined interval scope.
23. the method as described in claim 20 or 21, which is characterized in that the method further includes：
The index of gas is tested described in periodic statistics；
Index according to gas is tested in a cycle determines the indication range of the tested gas；
The pre-provisioning request is determined according to the indication range of the definite tested gas.
24. a kind of gas measuring method, which is characterized in that including：
Start gas conveying control device, the first inlet channel is opened by the first switching device, is led to by first air inlet
The gas outlet of the measurement chamber and the gas after the first predetermined time, are closed in road to measurement intracavitary injection reference gas
Conveying control device stops, to the measurement intracavitary injection reference gas, obtaining the first signal of sensor, and according to the first letter
The zero point of number acquisition sensor；
Open it is described measurement chamber gas outlet and the gas conveying control device, by the first switching device switch to second into
Gas passage by second inlet channel to the tested gas of measurement intracavitary injection, after the second predetermined time, obtains sensing
The secondary signal of device；
Zero point and secondary signal based on the sensor determine the index of tested gas.
25. a kind of gas measuring method, which is characterized in that including：
To measurement chamber injection reference gas, corresponding first subsignal of first sensor is obtained respectively, second sensor is corresponding
Second subsignal；
To the tested gas of measurement chamber injection, corresponding 3rd subsignal of first sensor is obtained respectively, second sensor is corresponding
4th subsignal；
Based on first subsignal, the second subsignal, the 3rd subsignal and the 4th subsignal, substitute into dual sensor and correspond to pass
System determines the index of tested gas.
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| CN113219134A (en) * | 2021-05-11 | 2021-08-06 | 华中科技大学 | Gas detection device |
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