CN205957259U - Can detect oil smoke concentration's lampblack absorber - Google Patents

Abstract

The utility model provides a can detect oil smoke concentration's lampblack absorber, including the casing, be equipped with fan and main control unit that can the control fan rotational speed in the casing, the fan is installed in the fan shell, and the fan shell sets up in the casing, and the fan shell has air intake and an air outlet, the main control unit still is connected with the photoelectric type smoke sensor that can detect oil smoke concentration, and this photoelectric type smoke sensor contains detection light emitting device and detects light receiving device, its characterized in that: it has the contained angle with detecting to be to detect light emitting device after light receiving device installs, and detects light emitting device's transmission orientation place straight line and detect the point of intersect of light receiving device's receipt orientation place straight line or zone bit in fan shell the air intake 1~5cm of below that crosses, it still includes protective structure to detect light emitting device or detect light receiving device. The utility model discloses detectivity is high, smoke sensor's resistant greasy dirt is effectual.

Description

A kind of lampblack absorber that can detect oil smoke concentration

Technical field

This utility model is related to a kind of lampblack absorber, more particularly to a kind of lampblack absorber that can detect oil smoke concentration.

Background technology

The Based Intelligent Control of existing lampblack absorber depends on sensor dense to relevant environment index such as gas concentration, oil smoke mostly The accurate detection of degree, temperature, odorousness, Range switch etc..Wherein, realize opening and closing automatically of lampblack absorber mainly to pass through Detect that these indexs are mutated from scratch, and automatically control the rotating speed of range hood fan or gear then mainly according to index value Size.

For example, the Chinese patent of Patent No. 20111003374.0 is it is proposed that a kind of Smoke Detection system based on photographic head System, can detect the size of amount of smoke, then automatically control lampblack absorber work according to smokescope.In the program, need to arrange Photographic head, to gather the image of the lampblack absorber kitchen range top in kitchen, then also needs to arrange Smoke Detection unit that the image gathering is entered Row analyzing and processing, then determines whether, if has oil smoke to produce, then by amount of smoke analytic unit, the concentration of smog is entered Row analysis, finally according to analysis result intelligent opening or closing lampblack absorber.In the program, need the complicated Smoke Detection list of setting Unit and amount of smoke analytic unit, and photographic head collection be the lampblack absorber kitchen range top in kitchen image, and the lampblack absorber kitchen range top is most It is non-smooth, and during cooking, food materials can constantly stir, the background after therefore shooting is more complicated, be unfavorable for follow-up The analysis of Smoke Detection unit and follow-up amount of smoke analytic unit judges, relatively costly, judges inaccurate.

Further for example, the Chinese patent of Patent No. 201410519856.X, the pan by being arranged on gas-cooker is proposed The bottom of a pan temperature sensor, real-time detection cooking bottom temperature, gas-cooker main control unit can be examined according to cooking bottom temperature testing circuit The cooking bottom temperature measuring calculates oil smoke amount, and then oil smoke amount information is passed through wireless signal transmitting module by gas-cooker main control unit It is sent to reception of wireless signals module, reception of wireless signals module and then oil smoke amount information is sent to lampblack absorber main control list Unit, lampblack absorber main control unit controls fan according to oil smoke amount information.

Further for example, the Chinese patent of patent No. 201280006420.X provides a kind of gratin according to heating device Temperature, to change the smoke exhaust ventilator of the air quantity of pressure fan, detects gratin temperature and the cooking by arranging infrared temperature sensor The mean temperature of thing environment temperature and the environment temperature of detection heating device, determine according to gratin temperature and cooking device signal Determine the air quantity of pressure fan.

Further for example, the patent of Application No. 201110061478.1 proposes with regard to a kind of cigarette stove coordinated control system and its control Molding group, lampblack absorber has a wind-force adjustment unit, control module include temperature-sensitive sticker, control unit, signal transmitter unit with Signal receiving unit, temperature-sensitive sticker is corresponding with kitchen range, control unit respectively with temperature-sensitive sticker and signal transmitter unit phase Even, control unit receives and processes temperature signal from temperature-sensitive sticker to obtain wind-force Regulate signal, wind-force Regulate signal It is transferred to signal transmitter unit.

The deficiency of above method is to detect that kitchen range, the sensor of pan state are detached with lampblack absorber, need to be by letter Breath transmission could control switch for cooker hood, and this will bring the increase of cost and the matching problem of kitchen range pan and lampblack absorber；Separately On the one hand, the index for controlling lampblack absorber air quantity is often the index of indirect, such as food materials temperature, pan temperature, kitchen range temperature The indexs such as degree and exhaustion drain and there is not strong correlation relation between oil smoke Air Quantity Required, control judgement inaccurate.

For this reason, the Chinese patent of Patent No. ZL 201420325713.0, disclosing one kind, directly to gather oil smoke dense Spend and then carry out according to oil smoke concentration the Intelligent drainage cigarette lampblack absorber of wind speed regulation, it includes body, blower fan and master controller, main Controller controls blower fan operating, and this lampblack absorber also includes：Infrared spectrum sensor-based system, infrared spectrum sensor-based system includes infrared light Emission part, infrared light receiver, optical sensor system and spectroscopic analysis system, the infrared light of described infrared light emission portion transmitting is extremely Behind oil smoke region below body, reflect through oil smoke or by oil smoke, infrared light receiver receives this transmission or reflection light and leads to Cross optical sensor system to transmit to spectroscopic analysis system, the spectrum calculating smog that this system passes through the infrared light that analysis receives is dense Degrees of data, and by this data transfer to master controller；Master controller includes speed calculation unit, and this computing unit is divided by spectrum The smokescope data judging blower fan gear that analysis system calculates, and according to blower fan gear output drive signal；Drive circuit, with master Controller connects, and drives blower fan to press corresponding rotation speed operation by receiving the drive signal of speed calculation unit.

In said structure, infrared spectrum sensor-based system detects oil smoke concentration, therefore, infrared light emission portion and infrared light-receiving Portion needs to contact with oil smoke, and infrared light emission portion and infrared light receiver unavoidably face contaminated situation, thus can lead Cause sensitivity to decline the risk even losing efficacy, and the infrared light that infrared light emission portion sends needs accurately by infrared light receiver Receive it is therefore desirable to high requirement is proposed to beam path alignment and receptor anti-natural light jamming performance.Although Application No. 200510042977.0 Chinese patent discloses a kind of air-flow and closes protection device dust-proof every formula pick-up lenss, is equipped with clean The conical ring flow generator of pure compression air source and adjustable flow, protects camera lens by air-flow to the blocking effect of dust；Shen Please number for 200520132940.2 Chinese patent employ similar method pass through high pressure pure air stream formed air curtain Protection photo-electric smoke concentration measurer, makes optics not contaminated.The deficiency of above safeguard structure is, needs additional Clean air source, producing of pure air is very complicated, and needs additionaling power source by pure air access equipment.In addition, it is oily Smoke sensor will accurately monitor the change of oil smoke concentration, and the reasonability that installation site is chosen is very important, the most important condition Be sensor detection range will oil smoke run must be through on path, but in prior art, will be often to oil smoke sensor It is arranged on exhaust fume collecting hood, when oil smoke amount is less, tend not to detect, therefore lead to the detection sensitivity of oil smoke sensor not High.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of detection sensitivity high, oily for above-mentioned prior art The good lampblack absorber that can detect oil smoke concentration of the resistance to greasy dirt effect of smoke sensor.

This utility model solves the technical scheme that adopted of above-mentioned technical problem：A kind of oil smoke that can detect oil smoke concentration Machine, including housing, the main control unit being provided with blower fan in housing and rotation speed of fan being controlled, assembling in blower housing, wind Machine shell is arranged in housing, and blower housing has air inlet and air outlet, and described main control unit is also associated with detecting oil smoke The photo-electric oil smoke sensor of concentration, this photo-electric oil smoke sensor comprises to detect light emitting devices and detection optical pickup apparatus, Detection light emitting devices tool can launch the light emission part of detection light, and detection optical pickup apparatus have and can receive light emission part and send out The light receiver portion of the detection light going out；It is characterized in that：After described detection light emitting devices and detection optical pickup apparatus installation it is in There is angle, and the transmitting of detection light emitting devices towards place straight line and detects the reception of optical pickup apparatus towards place straight line Intersection point or intersectional region are located at 1～5cm below blower housing air inlet；Described detection light emitting devices or/and detection light-receiving Device also includes safeguard structure, and this safeguard structure comprises the protective cover that inside has cavity, and one end of protective cover is provided with and cavity First opening of connection, the other end of protective cover is provided with the second opening that is relative with the first opening, equally connecting, institute with cavity State light emission part or/and light receiver portion is plugged in the first opening.

As improvement, described detection light emitting devices and detection optical pickup apparatus are installed on blower housing, and described The reception of the transmitting direction of detection light emitting devices and detection optical pickup apparatus is towards the oil smoke flowing all and two devices between Direction is vertical.

Improve again, described light emission part or/and the sealing of light receiver portion are plugged in the first opening, in such protective cover There is a malleation in chamber for tangentially swiftly flowing oil smoke air-flow, and oil smoke only can enter in pipe by natural diffuseness, greatly Reduce greatly the contaminated probability of probe.

Preferably, the transmitting of described detection light emitting devices is towards the reception direction of place straight line and detection optical pickup apparatus Angle between the straight line of place is 90 degree～150 degree.

Improve again, the distance between the end of described detection light emitting devices and the end of detection optical pickup apparatus are 3cm ～10cm.

Improve again, described protective cover is in the form of a column or tubulose, the cavity in protective cover is cylindrical cavity or tubular cavity.

Improve again, the internal diameter of the cavity between connection the first opening and the second opening presents and changes, the sky of internal diameter change Chamber 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 is on same straight line.

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.

Improve again, described photo-electric oil smoke sensor also includes the biography with detection light emitting devices and detection optical pickup apparatus Sensor circuit board, the power input of this sensor circuit board is electrically connected with city, the power output end of this sensor circuit board with Detection light emitting devices and detection optical pickup apparatus connect, in addition, having on this sensor circuit board and detection optical pickup apparatus The reception detection optical signal processing unit connecting, receives the inspection that detection optical signal processing unit can receive to detection optical pickup apparatus Light signal is amplified and conversion process, receives detection optical signal processing unit and is connected with main control unit.

Compared with prior art, the utility model has the advantage of：Described detection light emitting devices and detection light-receiving dress The installation site put very can sensitively detect the oil smoke amount entering blower interior, both just opened in gas-cooker, oil smoke very In the case of little, can sensitively detect, and can preferably ensure that oil smoke sensor detects recall rate and the signal stabilization of oil smoke Property, it is especially suitable for the Based Intelligent Control of fume exhaust ventilator and range linkage, that is,：Lampblack absorber detects after kitchen range open fire, and the very first time will Range hood fan is opened, and then adjusts rotation speed of fan further according to oil smoke concentration；Additionally by setting user's protection detection light transmitting Device or/and the safeguard structure of reception device head, the cavity of setting connection the first opening and the second opening in protective cover, so Afterwards light emission part or/and light receiver portion are plugged in the first opening, such light emission part or/and light receiver portion are not Can be directly exposed in oil smoke air-flow, and oil smoke only can enter the cavity of protective cover by natural diffuseness, greatly reduces light The contaminated probability of line emission part or/and light receiver portion, has preferably dust-proof, grease proofing smoke pollution effect.

Brief description

Fig. 1 is the internal structure schematic diagram of the lampblack absorber that can detect oil smoke concentration in this utility model embodiment one.

Fig. 2 is the structural representation of photo-electric oil smoke sensor in this utility model embodiment one.

Fig. 3 is the structural representation of photo-electric oil smoke sensor in this utility model embodiment two.

Fig. 4 is the structural representation of photo-electric oil smoke sensor in this utility model embodiment three.

Fig. 5 is the structural representation of this utility model embodiment another kind safeguard structure.

Fig. 6 is the structural representation of this utility model another safeguard structure of embodiment.

Fig. 7 is the structural representation of this utility model another safeguard structure of embodiment.

Specific embodiment

Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.

Embodiment one

The as shown in Figure 1 lampblack absorber that can detect oil smoke concentration, including housing 1, is provided with blower fan 2 and can control wind in housing The main control unit (not shown) of machine rotating speed, blower fan 2 is arranged in blower housing 3, and blower housing 3 is arranged in housing 1, wind Machine shell 3 has air inlet 31 and air outlet (not shown), and described main control unit is also associated with detecting oil smoke concentration Photo-electric oil smoke sensor, this photo-electric oil smoke sensor comprises to detect light emitting devices 4, detection optical pickup apparatus 5 and detection The sensor circuit board (not shown) that optical pickup apparatus connect, detection light emitting devices 4 tool can launch the light of detection light Emission part 41, detection optical pickup apparatus 5 have the light receiver portion 51 that can receive the detection light that light emission part sends；Sensor The power input of circuit board is electrically connected with city, the power output end of this sensor circuit board and detection light emitting devices and detection Optical pickup apparatus connect, in addition, having reception detection optical signal processing unit on sensor circuit board, receive at detection optical signal The light signal that light receiver portion receives is amplified processing by reason unit, and light signal is converted into oil smoke concentration signal, Receive the signal processing and amplifying technology detecting optical signal processing unit employing and photoelectric conversion technique all using routine techniquess.Described Detection light emitting devices and detection optical pickup apparatus are installed on blower housing, and are in have angle between the two after installation, should Angle is 60 degree～180 degree, is preferably 90 degree～150 degree；The transmitting of detection light emitting devices is towards place straight line and detection light The reception of reception device is located at 1～5cm below blower housing air inlet, detection light towards the intersection point of place straight line or intersectional region The distance between end of the end of discharger and detection optical pickup apparatus is 3cm～10cm.

Described detection light emitting devices 4 also include the safeguard structure for being protected to light emission part 41, referring to Fig. 2 Shown, this safeguard structure comprises tubular protective cover 61, has tubular cavity 62, one end of tubular protective cover inside tubular protective cover Be provided with the first opening 63 connecting with tubular cavity, the other end of tubular protective cover be provided with relative with the first opening, same with Second opening 64 of tubular cavity connection, light emission part 41 is sealingly mounted in the first opening.Connect the first opening and second The internal diameter of the cavity between opening presents and changes；In the present embodiment, the change of this internal diameter is realized in the following way：Tubulose is empty It is provided with barrier plate 66 in the middle part of chamber, this barrier plate has through hole, the through hole central point on barrier plate is opened with the first opening and second The central point of mouth is on same straight line.

Safeguard structure in detection light emitting devices, is designed by deep cavate, so that the light of detection light emitting devices 4 is launched Portion 41 will not be directly exposed in oil smoke air-flow, and light emission part 41 installation end seals, and makes tubular protective cover inner chamber with respect to cutting There is a malleation to for swiftly flowing oil smoke air-flow, oil smoke only can be entered in pipe by natural diffuseness, greatly reduces light The contaminated probability of line emission part 41；The design of barrier plate 66, makes tubular intracavity internal diameter change, is opened by second in oil smoke When mouth enters cavity, oil smoke obtains the diffusion motive force of radial direction, and most of oil smoke entering in pipe is diluted in this section and adheres to In inside pipe wall, when cavity inside diameter intercepts through barrier plate, the through hole on barrier plate carries out next step infiltration to oil smoke again, stops The wall of plate blocks a part of oil smoke again, can make to reach the probability of light emission part by diffusing into the oil smoke in cavity Greatly reduce.The uncollimated light that light emission part 41 sends can also be disappeared by this structure through the internal reflection of barrier plate Remove, thus ensureing the collimation of emergent light.

Detection optical pickup apparatus 5 equally include the safeguard structure for being protected to light receiver portion 51, and detection light connects Safeguard structure in receiving apparatus 5 is identical with the safeguard structure in detection light emitting devices；Protection knot in detection optical pickup apparatus 5 Structure can eliminate the impact that natural light and environment veiling glare receive optical signal to light receiver portion 51.

In the present embodiment, described light emission part is light emitting diode or the laser tube that can send infrared light, light used Acceptance division is to correspond to the diode or triode receiving the infrared light that sends of light emission part or laser.

Embodiment two

From unlike embodiment one, only detection light emitting devices 4 are provided with the protection for protecting light emission part 41 Structure, the structure that safeguard structure is described with embodiment one is identical, shown in Figure 3.

Embodiment three

From unlike embodiment one, only detection optical pickup apparatus 5 are provided with the protection for protecting light receiver portion 51 Structure, the structure that safeguard structure is described with embodiment one is identical, shown in Figure 4.

In addition, safeguard structure is in addition to the structure described in embodiment one, can also there are other forms：As tubular cavity Interior barrier plate 66 can be provided with multiple, and interval setting, and such as 3, on two neighboring barrier plate 66, the diameter of through hole can phase Together it is also possible to differ, shown in Fig. 5.The design in this multiple reducing labyrinth, makes tubular cavity internal diameter repeatedly expand, reduce, During expansion, 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 in pipe Wall, when reducing, stops that the wall of version blocks a part of oil smoke again, so repeatedly circulates, so that oil smoke is entered in pipe and have footpath To Concentraton gradient, such that it is able to make by diffuse into the oil smoke in pipe reach light emission part Probability maximum reduction. In addition, the variable diameter design of tubular cavity is moreover it is possible to form optics labyrinth in pipe, the angle of divergence that elimination light emission part 41 sends is larger Light it is ensured that the collimation of emergent light；For detection optical pickup apparatus 5 moreover it is possible to elimination natural light and environment veiling glare connect to light Receipts portion 51 receives the impact of optical signal.

In addition, the pipe thickness of tubular protective cover presents, thick middle both sides are gradually thinning, so that the internal diameter of tubular cavity Assume change, shown in Figure 6.

In addition, the pipe thickness of tubular protective cover can present being continually changing, so that the internal diameter of tubular cavity presents not Disconnected change, shown in Figure 7.

In addition, the one or more pairs of dividing plates being oppositely arranged can also be provided with the middle part of tubular cavity, have between each pair dividing plate Gap, between dividing plate, the center in gap and the center of the first opening and the second opening are on same straight line

In the present embodiment, light emission part is light emitting diode or the laser tube that can send infrared light, and light receiver portion For the diode or triode receiving the infrared light that sends of light emission part or laser can be corresponded to.

Claims (16)

1. a kind of lampblack absorber that can detect oil smoke concentration, including housing, the master being provided with blower fan in housing and controlling rotation speed of fan Control unit, in blower housing, blower housing is arranged in housing assembling, and blower housing has air inlet and air outlet, Described main control unit is also associated with detecting the photo-electric oil smoke sensor of oil smoke concentration, and this photo-electric oil smoke sensor comprises to examine Light-metering discharger and detection optical pickup apparatus, detection light emitting devices tool can launch the light emission part of detection light, detection light Reception device has the light receiver portion that can receive the detection light that light emission part sends；It is characterized in that：Described detection light is sent out It is in have angle after injection device and detection optical pickup apparatus installation, and detect the transmitting of light emitting devices towards place straight line and detection The reception of optical pickup apparatus is located at 1～5cm below blower housing air inlet towards the intersection point of place straight line or intersectional region；Described Detection light emitting devices or/and detection optical pickup apparatus also include safeguard structure, and this safeguard structure comprises inside and has cavity Protective cover, one end of protective 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 , the second opening equally connecting with cavity, described light emission part or/and light receiver portion are plugged in the first opening.

2. lampblack absorber according to claim 1 it is characterised in that：Described detection light emitting devices and detection optical pickup apparatus It is installed on blower housing, and the transmitting direction of described detection light emitting devices and the reception of detection optical pickup apparatus are towards all Oil smoke flow direction between two devices is vertical.

3. lampblack absorber according to claim 1 it is characterised in that：Described light emission part or/and the sealing of light receiver portion It is plugged in the first opening.

4. lampblack absorber according to claim 1 it is characterised in that：The transmitting of described detection light emitting devices is straight towards being located The reception of line and detection optical pickup apparatus is 90 degree～150 degree towards the angle between the straight line of place.

5. the lampblack absorber according to claim 1 or 2 or 3 or 4 it is characterised in that：The end of described detection light emitting devices The distance between end with detection optical pickup apparatus is 3cm～10cm.

6. lampblack absorber according to claim 1 it is characterised in that：Described protective cover is in the form of a column or tubulose, in protective cover Cavity is cylindrical cavity or tubular cavity.

7. lampblack absorber according to claim 1 it is characterised in that：Connect cavity between the first opening and the second opening Internal diameter presents and changes.

8. lampblack absorber according to claim 7 it is characterised in that：Connect cavity between the first opening and the second opening Internal diameter presents n times and first reduces the change expanding again, and N is the natural number more than or equal to 1.

9. lampblack absorber according to claim 7 it is characterised in that：Connect in the cavity between the first opening and the second opening Wall is provided with the N being oppositely arranged to dividing plate, is respectively provided with gap between each pair dividing plate, and N is the natural number more than or equal to 1.

10. lampblack absorber according to claim 9 it is characterised in that：When N is more than or equal to 2, between adjacent two pairs of dividing plates Gap differs.

11. lampblack absorbers according to claim 10 it is characterised in that：N is to the center in gap between dividing plate and the first opening It is on same straight line with the center of the second opening.

12. lampblack absorbers according to claim 7 it is characterised in that：Connect the cavity between the first opening and the second opening Inside it is provided with N number of barrier plate, each barrier plate has through hole, N is the natural number more than or equal to 1.

13. lampblack absorbers according to claim 12 it is characterised in that：When N is more than or equal to 2, on two neighboring barrier plate The diameter of through hole differs.

14. lampblack absorbers according to claim 13 it is characterised in that：Through hole central point on N number of barrier plate is opened with first The central point of mouth and the second opening is on same straight line.

15. lampblack absorbers according to claim 7 it is characterised in that：The pipe thickness of described protective cover assumes change, thus The internal diameter of the cavity between connection first opening and the second opening is made to assume change.

16. lampblack absorbers according to claim 1 it is characterised in that：Described photo-electric oil smoke sensor also includes and detection Light emitting devices and the sensor circuit board of detection optical pickup apparatus, the power input of this sensor circuit board and city are electrically connected Connect, the power output end of this sensor circuit board is connected with detection light emitting devices and detection optical pickup apparatus, in addition, this sensing The reception detection optical signal processing unit being connected with detection optical pickup apparatus is had on device circuit board, receives detection optical signal prosessing Unit can be amplified and conversion process to the detection optical signal that detection optical pickup apparatus receive, and receives detection optical signal prosessing list Unit is connected with main control unit.