CN106404674A - Photoelectric oily fume sensor - Google Patents
Photoelectric oily fume sensor Download PDFInfo
- Publication number
- CN106404674A CN106404674A CN201610848224.7A CN201610848224A CN106404674A CN 106404674 A CN106404674 A CN 106404674A CN 201610848224 A CN201610848224 A CN 201610848224A CN 106404674 A CN106404674 A CN 106404674A
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- CN
- China
- Prior art keywords
- opening
- cavity
- oil smoke
- photo
- electric oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Abstract
The invention relates to a photoelectric oily fume sensor. The photoelectric oily fume sensor comprises a detection light transmitting/receiving device, wherein the device has a head which can transmit or receive detection light. The photoelectric oily fume sensor is characterized in that the photoelectric oily fume sensor further comprises a protection structure, the protection structure comprises a protection cover with a cavity inside, a first opening communicated with the cavity is formed in one end of the protection cover, a second opening opposite to the first opening and also communicated with the cavity is formed in the other end of the protection cover, and the head of the detection light transmitting/receiving device is inserted into the first opening. As compared with the prior art, the photoelectric oily fume sensor has the following advantages that: by arranging the protection structure for a user protection light transmitting/receiving part, forming the cavity communicated with the first opening and the second opening in the protection cover and then inserting the light transmitting/receiving part into the first opening, the light transmitting/receiving part is not directly exposed to an oily fume air flow; oily fume enters the protection cover only through a diffused way, the probability that the probe is polluted is greatly reduced, and the dust and oily fume pollution prevention effects are better.
Description
Technical field
The present invention relates to a kind of photo-electric oil smoke sensor.
Background technology
Photoelectric sensor is the sensor using photoelectric cell as detecting element.It includes a detection light transmitting dress
Put and detect optical pickup apparatus, detection light emitting devices transmitting detection light, detection optical pickup apparatus receive detection light, the inspection of reception
After the refraction of substances to be measured (as oil smoke concentration), light intensity can change, and then relend and help photoelectric cell for light-metering
Further light intensity signal is converted into the signal of telecommunication.Photoelectric sensor is typically by detection light emitting devices, detection light-receiving dress
Put and photoelectric cell three part composition.Photoelectric detecting method has the advantages that high precision, reacts fast, noncontact, and can survey ginseng
Number is many, and the structure of sensor is simple, and flexible form is various, and therefore, electro-optical pickoff is applied very wide in detection and control
General.
Under specific application scenarios, photoelectric sensor may face device and be contaminated and lead to sensitivity to decline even inefficacy
Risk, and in some scenarios to beam path alignment and the exigent situation of receptor anti-natural light jamming performance.
The Chinese patent of Application No. 200510042977.0 disclose a kind of air-flow close dust-proof every formula pick-up lenss
Protection device, is equipped with the conical ring flow generator of clean compressed air source and adjustable flow, by the resistance to dust for the air-flow
Disconnected effect protection camera lens；It is clean empty by high pressure that the Chinese patent of Application No. 200520132940.2 employs similar method
The air curtain protection photo-electric smoke concentration measurer that air-flow is formed, makes optics not contaminated.
The deficiency of above method is, needs additional clean air source, and producing of pure air is very complicated, and needs additional
Power source is by pure air access equipment.
Content of the invention
The technical problem to be solved is to provide a kind of structure simple low cost oil resistant for above-mentioned prior art
The good photo-electric oil smoke sensor of dirty effect.
The present invention solves the technical scheme that adopted of above-mentioned technical problem：A kind of photo-electric oil smoke sensor, comprises to examine
Light-metering transmission/reception, this device there is the head that can launch or receive detection light it is characterised in that：Also include protection
Structure, this safeguard structure comprises the protective cover that inside has cavity, and one end of protective cover is provided with the first opening connecting with cavity,
The other end of protective cover is provided with the second opening that is relative with the first opening, equally connecting with cavity, and described detection light is launched/connect
The head of receiving apparatus is plugged in the first opening.
As improvement, the probe sealing of described photo-electric oil smoke sensor is plugged in the first opening, during use, will protect
Structure axial direction and oil smoke airflow direction right angle setting, such protective cover inner chamber is for tangentially swiftly flowing oil smoke air-flow
There is a malleation, oil smoke only can be entered in pipe by natural diffuseness, greatly reduce the contaminated probability of probe.
Preferably, described protective cover is in the form of a column or tubulose, and the cavity in protective cover is cylindrical cavity or tubular cavity.
As improvement, the internal diameter connecting the cavity between the first opening and the second opening presents and changes, internal diameter change
Cavity can make the probability reaching probe by the oil smoke diffusing into protective cover inner chamber substantially reduce.
Improve again, the internal diameter of the cavity between connection the first opening and the second opening presents n times and first reduces and expands
Change, N is the natural number more than or equal to 1.Cavity inside diameter, through reducing expansion change, enters cavity in oil smoke by the second opening
When, oil smoke obtains the diffusion motive force of radial direction, and most of oil smoke entering in pipe is diluted in this section and is attached to inside pipe wall, when
When cavity inside diameter reduces, the wall of radial direction blocks a part of oil smoke again, so circulates through n times, can make by diffusing into
Enter the reduction that the oil smoke in cavity reaches the Probability maximum of sensor probe.
As a kind of preferable embodiment, connect the cavity inner wall between the first opening and the second opening and be provided with relative setting
The N putting, to dividing plate, is respectively provided with gap between each pair dividing plate, N is the natural number more than or equal to 1.Oil smoke can be sensed by this structure
The uncollimated light that device transmitting probe sends eliminates through n times internal reflection, thus ensureing the collimation of emergent light, for sensing
Device receiving transducer is said, then can greatly reduce the impact to receipt signal of natural light and environment veiling glare.
When N is more than or equal to 2, the gap between adjacent two pairs of dividing plates differs.
N is on same straight line with the center of the first opening and the second opening to the center in gap between dividing plate.
As in addition preferable embodiment, in the cavity between connection the first opening and the second opening, it is provided with N number of stop
Plate, each barrier plate has through hole, and N is the natural number more than or equal to 1.
When N is more than or equal to 2, on two neighboring barrier plate, the diameter of through hole differs.
The central point of the through hole central point on N number of barrier plate and the first opening and the second opening be in same directly on.
Alternatively preferable embodiment, the pipe thickness of described protective cover assumes change, so that connection first
The internal diameter of the cavity between opening and the second opening assumes change.
Described light emission part can be light emitting diode or the laser tube that can send infrared light, and light receiver portion used is
Infrared light or the diode or triode of laser that energy corresponding reception light emission part sends.
As improvement, photo-electric oil smoke sensor also includes the sensing with detection light emitting devices and detection optical pickup apparatus
Device circuit board, this sensor circuit board is electrically connected with city and is detection light emitting devices and detection optical pickup apparatus offer power supply,
In addition, the reception detection optical signal processing unit being connected with detection optical pickup apparatus is had on this sensor circuit board.
Compared with prior art, it is an advantage of the current invention that：Protect detection light transmission/reception head by arranging user
The safeguard structure in portion, in protective cover, then detection light is launched/is received by the cavity of setting connection the first opening and the second opening
The head of device is plugged in the first opening, and such light emission part or/and light receiver portion will not be directly exposed to cooking fume
In stream, and oil smoke only can enter the cavity of protective cover by natural diffuseness, greatly reduce light emission part or/and light connects
The contaminated probability in receipts portion, has preferably dust-proof, grease proofing smoke pollution effect.
Brief description
Fig. 1 is the structural representation of photo-electric oil smoke sensor in the embodiment of the present invention one.
Fig. 2 is the structural representation of photo-electric oil smoke sensor in the embodiment of the present invention two.
Fig. 3 is the structural representation of photo-electric oil smoke sensor in the embodiment of the present invention three.
Fig. 4 is the structural representation of photo-electric oil smoke sensor in the embodiment of the present invention four.
Specific embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one
Photo-electric oil smoke sensor as shown in Figure 1, comprises detection light transmission/reception 5, and this device has can be launched
Or the head 51 of reception detection light, also include safeguard structure, this safeguard structure comprises tubular protective cover 1, in tubular protective cover
Portion has tubular cavity 2, and one end of tubular protective cover is provided with the first opening 3 connecting with tubular cavity, tubular protective cover another
One end is provided with the second opening 4 that is relative with the first opening, equally connecting with tubular cavity, and head 51 sealing is plugged on first and opens
In mouthful；And the internal diameter connecting the cavity between the first opening and the second opening presents and changes；In the present embodiment, the change of this internal diameter
Change and realize in the following way：It is provided with barrier plate 6 in the middle part of tubular cavity, this barrier plate has through hole, the through hole on barrier plate
The central point of central point and the first opening and the second opening be in same directly on.
Above-mentioned safeguard structure, is designed by deep cavate, and the head 51 making detection light transmission/reception 5 will not be directly sudden and violent
It is exposed in oil smoke air-flow, head 51 installation end seals, and makes tubular protective cover inner chamber with respect to tangentially swiftly flowing oil smoke air-flow
For have a malleation, oil smoke only can by natural diffuseness enter pipe in, greatly reduce the contaminated probability of head 51；Resistance
The design of baffle plate 6, makes tubular intracavity internal diameter change, and when oil smoke enters cavity by the second opening, oil smoke obtains radial direction
Diffusion motive force, most of oil smoke entering in pipe is diluted in this section and is attached to inside pipe wall, when cavity inside diameter is through stopping
Plate intercepts, and the through hole on barrier plate carries out next step infiltration to oil smoke again, and the wall of barrier plate blocks a part of oil smoke again,
Can make by diffusing into the reduction that the oil smoke in cavity reaches the Probability maximum of light emission part.This structure can also be by energy
The uncollimated light that the head of transmitting detection light sends eliminates through the internal reflection of barrier plate, thus ensureing the collimation of emergent light
Property；For receiving the head of detection light, then can greatly reduce the natural light and environment veiling glare shadow to receipt signal
Ring energy.
In the present embodiment, described detection light emitting devices are light emitting diode or the laser tube that can send infrared light, used
Detection optical pickup apparatus are the diode or triode that can correspond to the reception infrared light that sends of light emission part or laser.
Embodiment two
From unlike embodiment one, the barrier plate 6 in above described tubular cavity is provided with multiple, interval setting, the present embodiment
In be 3, on two neighboring barrier plate 6 diameter of through hole can identical it is also possible to differ, through-hole diameter phase in the present embodiment
With shown in Figure 2.The design in this multiple reducing labyrinth, makes tubular cavity internal diameter repeatedly expand, reduce, when expanding, oil
Cigarette obtains the diffusion motive force of radial direction, and most of oil smoke entering in pipe is diluted in this section and is attached to inside pipe wall, when reducing
When, stop that the wall of version blocks a part of oil smoke again, so repeatedly circulate, make the concentration ladder in oil smoke entrance pipe with radial direction
Degree, such that it is able to make by diffusing into the reduction that the oil smoke in pipe reaches the Probability maximum of sensor probe.In addition, tubulose is empty
The variable diameter design in chamber moreover it is possible to form optics labyrinth in pipe, eliminate the larger light of the angle of divergence that detection light emitting devices send it is ensured that
The collimation of emergent light, for detection optical pickup apparatus, then effectively reduces the interference of natural light and ambient light.
Embodiment three
From unlike embodiment one, it is gradually thinning that the pipe thickness of tubular protective cover assumes thick middle both sides, so that
The internal diameter of tubular cavity assumes change, shown in Figure 3.
Example IV
From unlike embodiment three, the pipe thickness of tubular protective cover presents and is continually changing, so that tubular cavity
Internal diameter presents and is continually changing, shown in Figure 4.
Embodiment five
From unlike embodiment one, be provided with the one or more pairs of dividing plates being oppositely arranged, each pair dividing plate in the middle part of tubular cavity
Between there is gap, between dividing plate, the center of the center in gap and the first opening and the second opening is on same straight line.
Claims (10)
1. a kind of photo-electric oil smoke sensor, comprises detection light transmission/reception, and this device has can launch or receive detection
The head of light it is characterised in that：Also include safeguard structure, this safeguard structure comprises the protective cover that inside has cavity, protection
One end of cover is provided with the first opening connecting with cavity, and the other end of protective cover is provided with relative with the first opening, same and sky
Second opening of chamber connection, the head of described detection light transmission/reception is plugged in the first opening.
2. photo-electric oil smoke sensor according to claim 1 it is characterised in that：Described detection light transmission/reception
Head seal be plugged in the first opening.
3. photo-electric oil smoke sensor according to claim 1 it is characterised in that：Described protective cover is in the form of a column or tubulose,
Cavity in protective cover is cylindrical cavity or tubular cavity.
4. photo-electric oil smoke sensor according to claim 1 it is characterised in that：Connect the first opening and the second opening it
Between the internal diameter of cavity present and change.
5. photo-electric oil smoke sensor according to claim 4 it is characterised in that：Connect the first opening and the second opening it
Between the internal diameter of cavity present n times and first reduce the change expanding again, N is the natural number more than or equal to 1.
6. according to claim 4 detection optical pickup apparatus it is characterised in that：Connect between the first opening and the second opening
Cavity inner wall be provided with the N being oppositely arranged to dividing plate, be respectively provided with gap between each pair dividing plate, N is the natural number more than or equal to 1.
7. photo-electric oil smoke sensor according to claim 6 it is characterised in that：When N is more than or equal to 2, adjacent two is right
Gap between dividing plate differs, and N is in same to the center in gap between dividing plate and the center of the first opening and the second opening
On one straight line.
8. photo-electric oil smoke sensor according to claim 4 it is characterised in that：Connect the first opening and the second opening it
Between cavity in be provided with N number of barrier plate, each barrier plate has through hole, N is the natural number more than or equal to 1.
9. photo-electric oil smoke sensor according to claim 8 it is characterised in that：When N is more than or equal to 2, two neighboring
On barrier plate, the diameter of through hole differs, the through hole central point on N number of barrier plate and the central point of the first opening and the second opening
Be in same directly on.
10. photo-electric oil smoke sensor according to claim 4 it is characterised in that：The pipe thickness of described protective cover is in
Now change, so that the internal diameter of the cavity between connection the first opening and the second opening assumes change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610848224.7A CN106404674A (en) | 2016-09-26 | 2016-09-26 | Photoelectric oily fume sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610848224.7A CN106404674A (en) | 2016-09-26 | 2016-09-26 | Photoelectric oily fume sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106404674A true CN106404674A (en) | 2017-02-15 |
Family
ID=57996591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610848224.7A Pending CN106404674A (en) | 2016-09-26 | 2016-09-26 | Photoelectric oily fume sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106404674A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017211075A1 (en) * | 2016-06-07 | 2017-12-14 | 宁波方太厨具有限公司 | Protective structure of oil smoke sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204154642U (en) * | 2014-06-04 | 2015-02-11 | 江南大学 | A kind of infrared oil smoke concentration sensor |
| CN205749255U (en) * | 2016-06-07 | 2016-11-30 | 宁波方太厨具有限公司 | A kind of safeguard structure of oil smoke sensor |
-
2016
- 2016-09-26 CN CN201610848224.7A patent/CN106404674A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204154642U (en) * | 2014-06-04 | 2015-02-11 | 江南大学 | A kind of infrared oil smoke concentration sensor |
| CN205749255U (en) * | 2016-06-07 | 2016-11-30 | 宁波方太厨具有限公司 | A kind of safeguard structure of oil smoke sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017211075A1 (en) * | 2016-06-07 | 2017-12-14 | 宁波方太厨具有限公司 | Protective structure of oil smoke sensor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170215 |