CN208124401U - smoke detection self-starting device and system - Google Patents

Abstract

The utility model provides a kind of Smoke Detection self-starting device and system, is related to the technical field of Smoke Detection, which includes detection unit, and the relay connecting with detection unit；Detection unit includes smoke sensor device and comparator；Smoke sensor device is used to detect the concentration parameter of smog in environment, exports electric signal corresponding with concentration parameter, and electric signal is sent to comparator；Comparator sends trigger signal to relay when electric signal is higher or lower than pre-set voltage threshold for receiving electric signal, and triggering normally opened contact acts air cleaning facility to switch on or off the power path of air cleaning facility.Smoke Detection self-starting device provided by the utility model and system can change the operating status of air cleaning facility automatically, help to improve the Experience Degree of user.

Description

Smoke Detection self-starting device and system

Technical field

The utility model relates to the technical fields of Smoke Detection, more particularly, to a kind of Smoke Detection self-starting device and are System.

Background technique

Currently, popularizing with kitchen appliance, smoke exhaust ventilator has become kitchen appliance essential to house.Smoke exhaust ventilator It is a kind of kitchen appliance for purifying kitchen environment, in general, smoke exhaust ventilator is mounted on above kitchen range, for what cooking stove burnt The oil smoke being harmful to the human body generated in waste and cooking process is taken away rapidly, and discharge is outdoor, reduces pollution, purifies air, and There are gas defence, explosion-proof safety guarantee effect.

But existing smoke exhaust ventilator needs to rely on the manual operation of user, to change operating status, using flexible compared with Difference reduces the Experience Degree of user.

For above-mentioned since flexibility is poor, the technical problem for causing the Experience Degree of user lower not yet proposes have at present The solution of effect.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of Smoke Detection self-starting device and system, to alleviate Flexibility poor technical problem when using smoke exhaust ventilator in the prior art, to improve the Experience Degree of user.

In a first aspect, the utility model embodiment provides a kind of Smoke Detection self-starting device, which includes：Detection Unit, and the relay being connect with detection unit, wherein one of normally opened contact of relay and air cleaning facility Power switch connection；Above-mentioned detection unit includes smoke sensor device and comparator, and smoke sensor device and relay are and comparator Connection；Above-mentioned smoke sensor device is used to detect the concentration parameter of smog in local environment, exports telecommunications corresponding with concentration parameter Number, and electric signal is sent to comparator；Above-mentioned comparator arrangement has reference circuit, and reference circuit is previously provided with first threshold Voltage and second threshold voltage；Wherein, first threshold voltage is higher than second threshold voltage；Above-mentioned comparator is for receiving telecommunications Number, the first trigger signal, triggering normally opened contact closure, to connect are sent to relay when electric signal is higher than first threshold voltage The power path of air cleaning facility starts air cleaning facility；Under above-mentioned air cleaning facility starting state, comparator is also For sending the second trigger signal to relay, triggering normally opened contact is restored to often when electric signal is lower than second threshold voltage Open state, to cut off the power path of air cleaning facility.

With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect, In, above-mentioned comparator is the comparator based on amplifier chip；The output end and said reference circuit of above-mentioned smoke sensor device are distinguished It is connected to same group of input port of amplifier chip；Above-mentioned relay is connected to output port corresponding with above-mentioned input port.

The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect Two kinds of possible embodiments, wherein said reference circuit includes bleeder circuit and feedback resistance；Wherein, the one of feedback resistance End is connect with above-mentioned input port, and the other end of feedback resistance is connect with above-mentioned output port；Above-mentioned bleeder circuit includes fixing Bleeder circuit and/or adjustable voltage division circuit；When bleeder circuit includes adjustable voltage division circuit, reference circuit is also used to by adjustable The sensitivity of bleeder circuit adjusting smoke sensor device.

With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect, In, above-mentioned relay is connect by first switch circuit with comparator；First trigger signal is triggering first switch circuit conducting Electric signal.

With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect, In, above-mentioned detection unit further includes the alarm connecting with comparator；Above-mentioned comparator is also used to be higher than the when above electrical signal When one threshold voltage, warning trigger signal is sent to alarm, triggering alarm carries out warning note.

The 4th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect Five kinds of possible embodiments, wherein above-mentioned alarm is connect by second switch circuit with comparator；Warning trigger signal is Trigger the electric signal of second switch circuit conducting.

The 5th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect Six kinds of possible embodiments, wherein above-mentioned detection unit further includes the oscillator connecting with comparator, the output end of oscillator With second switch circuit connection；Above-mentioned oscillator is used to send oscillator signal to alarm when the conducting of second switch circuit, with Control the warning note frequency of alarm.

With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect, In, above-mentioned apparatus further includes power module, and power module is connect with above-mentioned detection unit and above-mentioned relay, is supplied to above-mentioned apparatus Electricity.

With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect, In, above-mentioned apparatus is additionally provided with shell, and with the matched detection probe of shell, detection probe extends to the outside of shell；Its In, above-mentioned smoke sensor device is arranged in detection probe, and, detection probe is hollow out probe.

Second aspect, the utility model embodiment additionally provide a kind of Smoke Detection self-starting system, which, which wraps, states Smoke Detection self-starting device described in first aspect, further includes air cleaning facility；Wherein, Smoke Detection self-starting device with The power switch of air cleaning facility connects.

The utility model embodiment brings following beneficial effect：

A kind of Smoke Detection self-starting device provided by the embodiment of the utility model and system, are detected by smoke sensor device The concentration parameter of smog in local environment exports electric signal corresponding with concentration parameter, and electric signal is sent to comparator, makes Comparator can send the first trigger signal to relay when electric signal is higher than first threshold voltage, and triggering normally opened contact closes It closes, to connect the power path of air cleaning facility, starts air cleaning facility；Under air cleaning facility starting state, when When electric signal is lower than second threshold voltage, comparator can also send the second trigger signal to relay, and triggering normally opened contact is extensive Normally open is arrived again, and to cut off the power path of air cleaning facility, the operation for changing air cleaning facility automatically may be implemented State, while also improving using flexible and the Experience Degree of user.

Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating Specifically noted structure is achieved and obtained in book, claims and attached drawing.

To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and Cooperate appended attached drawing, is described in detail below.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not making the creative labor for those skilled in the art Under the premise of, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of structural block diagram of Smoke Detection self-starting device provided by the embodiment of the utility model；

Fig. 2 is the structural block diagram of another Smoke Detection self-starting device provided by the embodiment of the utility model；

Fig. 3 is a kind of circuit theory schematic diagram of detection part provided by the embodiment of the utility model；

Fig. 4 is a kind of circuit theory schematic diagram of self-starting part provided by the embodiment of the utility model；

Fig. 5 is a kind of circuit theory schematic diagram of Smoke Detection self-starting device provided by the embodiment of the utility model；

Fig. 6 is a kind of outline structural diagram of Smoke Detection self-starting device provided by the embodiment of the utility model；

Fig. 7 is a kind of structural block diagram of Smoke Detection self-starting system provided by the embodiment of the utility model.

Icon：10- detection unit；20- relay；40- reference circuit；101- smoke sensor device；102- comparator；103- Alarm；601- cap；602- shell；603- detection probe；604- circuit board；605- fixes device；700- Smoke Detection is certainly Starter；701- air cleaning facility.

Specific embodiment

To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art are not making creation Property labour under the premise of every other embodiment obtained, fall within the protection scope of the utility model.

Currently, since existing smoke exhaust ventilator needs to rely on the manual operation of user, to change operating status, using flexible Property is poor, reduces the Experience Degree of user.

Based on this, the utility model embodiment provides a kind of Smoke Detection self-starting device and system, and can be improved makes With the Experience Degree of flexibility and user.

For convenient for understanding the present embodiment, first to a kind of Smoke Detection disclosed in the utility model embodiment from Starter describes in detail.

Embodiment one：

The utility model embodiment provides a kind of Smoke Detection self-starting device, a kind of Smoke Detection as shown in Figure 1 The structural block diagram of self-starting device, the device include：Detection unit 10, and the relay 20 being connect with detection unit 10, In, one of normally opened contact of relay 20 and the power switch of air cleaning facility connect.

When specific implementation, above-mentioned detection unit 10 includes smoke sensor device 101 and comparator 102,101 He of smoke sensor device Relay 20 is connect with comparator 102；Smoke sensor device 101 is used to detect the concentration parameter of smog in local environment, output Electric signal corresponding with concentration parameter, and electric signal is sent to the comparator 102.

Comparator 102 is configured with reference circuit 40, and reference circuit 40 is previously provided with first threshold voltage and second threshold Voltage；Wherein, first threshold voltage is higher than second threshold voltage；Comparator 102 is for receiving electric signal, when electric signal is higher than the The first trigger signal, triggering normally opened contact closure, to connect air cleaning facility are sent to relay 20 when one threshold voltage Power path starts air cleaning facility；Under air cleaning facility starting state, comparator 102 is also used to when electric signal is low When second threshold voltage, the second trigger signal is sent to relay, triggering normally opened contact is restored to normally open, to cut off sky The power path of gas cleaning equipment.

A kind of Smoke Detection self-starting device provided by the embodiment of the utility model detects locating ring by smoke sensor device The concentration parameter of smog in border exports electric signal corresponding with concentration parameter, and electric signal is sent to comparator；So as to compare Device receives electric signal, sends the first trigger signal to relay when electric signal is higher than first threshold voltage, triggers normally opened touching Point closure starts air cleaning facility to connect the power path of air cleaning facility；In air cleaning facility starting state Under, when electric signal is lower than second threshold voltage, the second trigger signal is sent to relay, triggering normally opened contact is restored to normally opened State can change the operating status of air cleaning facility to cut off the power path of air cleaning facility automatically, while also mention The high Experience Degree of using flexible and user.

When specific implementation, comparator provided by the embodiment of the utility model can be the comparator based on amplifier chip；Cigarette The output end and reference circuit of mist sensor are respectively connected to same group of input port of amplifier chip；Relay be connected to it is defeated The corresponding output port of inbound port, forms the detection part of entire Smoke Detection self-starting device, and relay can pass through first Switching circuit is connect with comparator；First trigger signal is to trigger the electric signal of first switch circuit conducting.

Usual amplifier chip is can to lead to too small amount of Resistor-Capacitor Unit with very extensive linear integrated circuit The function of realizing comparator, greatly reduces cost, while a small amount of capacitance resistance ware can also reduce the fault point of entire circuit, Improve reliability.

Further, said reference circuit includes bleeder circuit and feedback resistance；Wherein, one end of feedback resistance and input terminal Mouth connection, the other end of feedback resistance are connect with output port；Wherein, above-mentioned output port is the output end with smoke sensor device The corresponding output port of the input port of connection；Bleeder circuit includes fixed partial pressure circuit and/or adjustable voltage division circuit；Work as partial pressure When circuit includes adjustable voltage division circuit, reference circuit is also used to adjust the sensitivity of smoke sensor device by adjustable voltage division circuit. When specific implementation, above-mentioned first threshold voltage can be obtained by bleeder circuit, and above-mentioned second threshold voltage can pass through setting The resistance value of feedback resistance obtains.

When specific implementation, in order to open or close air cleaning facility, another kind smog inspection shown in Fig. 2 at the first time It surveys in the structural block diagram of self-starting device, above-mentioned detection unit 10 further includes the alarm 103 connecting with comparator 102.

Above-mentioned comparator 102 is also used to when electric signal is higher than first threshold voltage, sends alarm triggering to alarm 103 Signal；Alarm 103 is used for when receiving warning trigger signal, alarm is triggered, to prompt to alarm.When specific implementation, report Alert device can be connect by second switch circuit with comparator；Warning trigger signal is to trigger the telecommunications of second switch circuit conducting Number.

In order to make it easy to understand, Fig. 3 shows a kind of circuit theory schematic diagram of detection part, which includes aforementioned smog Sensor, reference circuit, comparator, alarm and second switch circuit.

As shown in Figure 3, wherein MQ is smoke sensor device, and U10 is comparator；Smoke sensor device MQ connects point with resistance R3 It is connect after pressure with 3 feet of comparator U10；Resistance R1, R2, R14 and variable resistance R20 form reference circuit, with comparator 2 feet of U10 connect, wherein 2 feet of comparator U10 and 3 feet of comparator U10 are same group of input port of amplifier chip.

When specific implementation, resistance R1 and resistance R2 are composed in series fixed partial pressure circuit, resistance R2, resistance R14 and can power transformation It hinders R20 and forms adjustable voltage division circuit.

In view of saving element, the purpose of cost is reduced, in the welding of actual circuit plate, needs to adjust smoke sensor device When sensitivity, can only welding kesistance R2, resistance R14 and variable resistance R20, welding kesistance R1, does not then pass through variable resistance R20 adjusts the voltage threshold of reference circuit, realizes the adjustment of sensitivity of smoke sensor device；When being not necessarily to adjust sensitivity, then not Weld variable resistance R20 and resistance R14, welding kesistance R1 and resistance R2.

U10 is comparator, be detection part core element, realized using amplifier chip, model can be LM358 or The amplifier chips such as LM324.Wherein, for ease of description, the comparator shown in Fig. 3 is two-way input and output amplifier chip composition Comparator, in other embodiments, the parameter and signal of amplifier chip can also have other forms, also, its packing forms Such as patch-type or direct plugging-in can also be select and set according to actual needs, the utility model embodiment to this not It is limited.

Triode Q3, resistance R13 and resistance R10 form second switch circuit；P1 is buzzer, buzzer P1, triode Q2 and resistance R11 forms alarm, wherein and alarm described in the utility model embodiment removes buzzer shown in Fig. 3, It can also be other combined aural and visual alarms, to realize prompt facility.

It is also connected with feedback resistance in the triggering end of second switch circuit and the output end of smoke sensor device, as shown in Figure 3 Resistance R15, main purpose is to generate return difference, wherein in circuit theory schematic diagram shown in Fig. 3, R15 and comparator The positive input pin of U10 connects, and feedback resistance is positive feedback resistor at this time, by the cooperation of comparator and the positive feedback resistor, It can be during the electric signal that smoke sensor device exports changes from low to high, so that comparator has higher first threshold electricity Pressure, further, during the electric signal of smoke sensor device output changes from high to low, so that comparator has lower second Threshold voltage, meanwhile, when the change in electric of smoke sensor device output is slow, in first threshold voltage or second threshold electricity The Near The Critical Point of pressure will not generate concussion or vacillate, and improve stability；Also make before and after detecting smog alarm simultaneously, point There is not corresponding alarm start and stop voltage threshold, improves the Stability and dependability of whole device.

When specific implementation, above-mentioned feedback resistance can also be connect with the negative input pin of comparator, form negative feedback resistor, Its resistance value can be determined according to first threshold voltage and second threshold voltage, the type of attachment and resistance value of specific feedback resistance It can be configured according to the actual situation, it is not limited by the embodiments of the present invention.

Further, above-mentioned Smoke Detection self-starting device can also include the oscillator connecting with comparator, so that oscillation The output end and second switch circuit connection of device；When specific implementation, oscillator can be square-wave oscillator, for working as second switch Oscillator signal is sent to alarm when circuit is connected, to control the warning note frequency of alarm.

Specifically, as shown in figure 3, capacitor C1 and resistance R6, resistance R7, resistance R8 and resistance R9 group cost are practical new Another group of input port of the oscillator in type embodiment, oscillator and comparator connects, and is exported by corresponding output port Oscillator signal, the 7th pin of comparator U10 as shown in Figure 3, when specific implementation, the frequency of oscillator signal can be according to reality Service condition is configured, and such as by capacitance that capacitor C1 is arranged or is changed the resistance value of other resistance and is realized different frequencies The output of the oscillator signal of rate, to control the period of the prompt tone of buzzer.

In order to make it easy to understand, Fig. 4 shows a kind of circuit theory schematic diagram of self-starting part on the basis of Fig. 3, packet Include relay, first switch circuit, and the air cleaning facility being connect with relay power switch constitute access.Its In, the triggering end close to resistance R4 is connect with comparator shown in Fig. 3, specifically, is connect with the first pin of comparator U10.

K1 is relay, and P is the power switch of air purifier equipment；Triode Q1, resistance R4 and resistance R5 composition the One switching circuit, meanwhile, in order to make relay when power is off, the energy stored in coil can safe release, can also be One diode D1 of coil both ends parallel connection of relay, such as the Schottky diode of model SS14, to increase the safety of circuit Property.

When specific implementation, comparator U10 exports trigger signal, and trigger triode Q1 is connected, after triode Q1 conducting, relay The coil turn-on action of device K1, triggering normally opened contact movement, to switch on or off the power path of air cleaning facility, to realize The self-starting of air cleaning facility.

On the basis of Fig. 3 and Fig. 4, the utility model embodiment additionally provides a kind of electricity of Smoke Detection self-starting device Road schematic illustration, as shown in figure 5, include detection part shown in Fig. 3 circuit theory schematic diagram and it is shown in Fig. 4 from The circuit theory schematic diagram of actuating section.

When specific implementation, above-mentioned Smoke Detection self-starting device further includes power module, aforementioned comparator, smog sensing Device, relay, alarm and oscillator are connect with power module, are powered by the power module.Shown in fig. 5 In circuit theory schematic diagram, power module includes connecting terminal J1 and capacitor C2 and capacitor C3.In actual use, above-mentioned Connecting terminal J1 can be connect with matched power supply adaptor, access power supply, such as 5V power supply, realized and examined to smog Survey self-starting device power supply.

When specific implementation, the circuit theory schematic diagram of Smoke Detection self-starting device shown in fig. 5 can be passed by smog Sensor detects the concentration parameter of smog in local environment, exports electric signal corresponding with concentration parameter, and electric signal is sent to Comparator；So that comparator receives electric signal, the first triggering is sent to relay when electric signal is higher than first threshold voltage Signal, triggering normally opened contact closure start air cleaning facility to connect the power path of air cleaning facility；It is net in air Change under equipment starting state, when electric signal is lower than second threshold voltage, sends the second trigger signal to relay, trigger normally opened Contact is restored to normally open, to cut off the power path of air cleaning facility, effectively changes the operation shape of air cleaning facility State.

When specific implementation, the circuit structures such as above-mentioned comparator, relay, alarm and oscillator can be printed on circuit board On, which is arranged in a shell, to realize the function of Smoke Detection self-starting.Therefore, above-mentioned Smoke Detection opens certainly Dynamic device is additionally provided with shell.

Fig. 6 shows a kind of outline structural diagram of Smoke Detection self-starting device, wherein above-mentioned shell includes cap 601 and shell 602, and with the matched detection probe 603 of shell, detection probe 603 extends to the outside of shell.Comparator, The inside of shell is arranged in relay and alarm, and it is corresponding that circuit board 604 shown in fig. 6 can be circuit diagram shown in Fig. 5 Circuit board.Smoke sensor device is arranged in detection probe 603, and engraved structure can be set into detection probe, in order to smog Sensor comes into full contact with smog, detects the concentration parameter of smog.

Further, it is contemplated that circuit board will receive the phenomenon that influences such as water mist smog are corroded, the inside of above-mentioned shell Encapsulating processing can also be carried out, is sealed.

It is fixed and installs for the ease of above-mentioned Smoke Detection self-starting device, it can be in the outer surface of above-mentioned shell It is provided with fixed device 605, Smoke Detection self-starting device is allowed to be fixed and install by fasteners such as screws.

It should be appreciated that above-mentioned Fig. 3, Fig. 4 and circuit diagram shown in fig. 5 are only that the utility model embodiment provides A kind of preferred form, the model and parameter of Resistor-Capacitor Unit and diode and triode can be according to actual use situations It is configured；Further, contour structures shown in fig. 6 and a kind of preferred form of the utility model embodiment, in other realities It applies in mode, other sides of shell can also be arranged in above-mentioned detection probe, meanwhile, above-mentioned fixed device can also be according to reality Border use demand is arranged to other forms, and the utility model embodiment is not limited this.

Embodiment two：

On the basis of the above embodiments, the utility model embodiment additionally provides a kind of Smoke Detection self-starting system, A kind of structural block diagram of Smoke Detection self-starting system as shown in Figure 7, certainly including Smoke Detection described in above-described embodiment one Starter 700 further includes air cleaning facility 701.

When specific implementation, above-mentioned air cleaning facility can be the equipment such as the ventilating fan of smoke exhaust ventilator, air circulation system, Above-mentioned Smoke Detection self-starting device is used to detect the concentration parameter of smog in local environment, when the corresponding electric signal of concentration parameter When higher than first threshold voltage, trigger relay normally opened contact closure connects the power path of air cleaning facility, to start sky Gas cleaning equipment；In the state of air cleaning facility starting, when electric signal is lower than second threshold voltage, trigger relay is normal It opens contact and is restored to normally open, cut off the power path of air cleaning facility, to close air cleaning facility.

Smoke Detection self-starting system provided by the embodiment of the utility model, certainly with Smoke Detection provided by the above embodiment Starter technical characteristic having the same reaches identical technical effect so also can solve identical technical problem.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description Specific work process, can be with reference to the corresponding process in previous embodiment, details are not described herein.

In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can To be the connection inside two elements.To those skilled in the art, above-mentioned term can be understood in this reality with concrete condition With the concrete meaning in novel.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

Finally it should be noted that：Above embodiments, only specific embodiment of the present utility model, to illustrate that this is practical Novel technical solution, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned implementation The utility model is described in detail in example, it should be understood by those skilled in the art that：Any skill for being familiar with the art Art personnel within the technical scope disclosed by the utility model, can still carry out technical solution documented by previous embodiment Modification can readily occur in variation or equivalent replacement of some of the technical features；And these are modified, change or replace It changes, the spirit and scope for the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution should all cover It is within the protection scope of the utility model.Therefore, the protection scope of the utility model should be with scope of protection of the claims It is quasi-.

Claims (10)

1. a kind of Smoke Detection self-starting device, which is characterized in that described device includes：Detection unit, and with the detection The relay of unit connection, wherein one of normally opened contact of the relay and the power switch of air cleaning facility connect It connects；

The detection unit includes smoke sensor device and comparator, and the smoke sensor device and the relay are compared with described Device connection；

The smoke sensor device is used to detect the concentration parameter of smog in local environment, exports electricity corresponding with the concentration parameter Signal, and the electric signal is sent to the comparator；

The comparator arrangement has reference circuit, and the reference circuit is previously provided with first threshold voltage and second threshold electricity Pressure；Wherein, the first threshold voltage is higher than the second threshold voltage；

The comparator is for receiving the electric signal, when the electric signal is higher than the first threshold voltage to the relay Device sends the first trigger signal, triggers the normally opened contact closure, to connect the power path of the air cleaning facility, starting The air cleaning facility；

Under the air cleaning facility starting state, the comparator is also used to when the electric signal is lower than the second threshold When voltage, the second trigger signal is sent to the relay, the normally opened contact is triggered and is restored to normally open, described in cutting The power path of air cleaning facility.

2. the apparatus according to claim 1, which is characterized in that the comparator is the comparator based on amplifier chip；

The output end of the smoke sensor device and the reference circuit are respectively connected to same group of input terminal of the amplifier chip Mouthful；

The relay is connected to output port corresponding with the input port.

3. the apparatus of claim 2, which is characterized in that the reference circuit includes bleeder circuit and feedback resistance； Wherein, one end of the feedback resistance is connect with the input port, the other end of the feedback resistance and the output port Connection；

The bleeder circuit includes fixed partial pressure circuit and/or adjustable voltage division circuit；

When the bleeder circuit includes the adjustable voltage division circuit, the reference circuit is also used to through the adjustable partial pressure electricity Road adjusts the sensitivity of the smoke sensor device.

4. the apparatus according to claim 1, which is characterized in that the relay is by first switch circuit compared with described Device connection；First trigger signal is the electric signal of the triggering first switch circuit conducting.

5. the apparatus according to claim 1, which is characterized in that the detection unit further includes connecting with the comparator Alarm；

The comparator is also used to when the electric signal is higher than the first threshold voltage, sends alarm touching to the alarm It signals, triggers the alarm and carry out warning note.

6. device according to claim 5, which is characterized in that the alarm is by second switch circuit compared with described Device connection；The warning trigger signal is the electric signal of the triggering second switch circuit conducting.

7. device according to claim 6, which is characterized in that the detection unit further includes connecting with the comparator Oscillator, the output end of the oscillator and the second switch circuit connection；

The oscillator is used to oscillator signal is sent to the alarm, when second switch circuit conducting to control State the warning note frequency of alarm.

8. the apparatus according to claim 1, which is characterized in that described device further includes power module, the power module It connect with the detection unit and the relay, powers to described device.

9. the apparatus according to claim 1, which is characterized in that described device is additionally provided with shell, and with the shell Matched detection probe, the detection probe extend to the outside of the shell；

Wherein, the smoke sensor device is arranged in the detection probe, and, the detection probe is hollow out probe.

10. a kind of Smoke Detection self-starting system, which is characterized in that the system comprises according to any one of claims 1 to 9 Smoke Detection self-starting device further includes air cleaning facility；

Wherein, the Smoke Detection self-starting device is connect with the power switch of the air cleaning facility.