CN108240644A - Smoke exhaust ventilator - Google Patents
Smoke exhaust ventilator Download PDFInfo
- Publication number
- CN108240644A CN108240644A CN201611223502.6A CN201611223502A CN108240644A CN 108240644 A CN108240644 A CN 108240644A CN 201611223502 A CN201611223502 A CN 201611223502A CN 108240644 A CN108240644 A CN 108240644A
- Authority
- CN
- China
- Prior art keywords
- voltage threshold
- signal
- motor
- smoke exhaust
- exhaust ventilator
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
Abstract
The present invention proposes a kind of improved smoke exhaust ventilator, and the motor including air inlet, for the plate body of closing the air inlet and for driving the plate body further includes current of electric sampling module and signal comparing unit；The current of electric sampling module, the sampling resistor of the supply line including being serially connected with the motor；The current of electric sampling module is arranged to be used for exporting the sample voltage value at the sampling resistor both ends；The signal comparing unit, it is arranged to be used for receiving the sample voltage value and is compared the sample voltage value and its pre-set voltage threshold, and the signal comparing unit sends out instruction so that the motor stalls or reversion when the sample voltage value is greater than or equal to the voltage threshold.Technical solution using the present invention, when clamp hand risk occurs can quick response, can also reduce cost.
Description
【Technical field】
The present invention relates to smoke exhaust ventilator fields.
【Background technology】
At present, existing air inlet can be closed smoke exhaust ventilator occurs, specifically, plate body is driven by motor come close into
Air port.In this way, it there has been the risk that user's finger is clamped by plate body.The problem of for reply clamp hand, it there has been the oil pumping of finger
Smoke machine scheme is suggested.The smoke exhaust ventilator scheme of existing finger is typically provided with MCU (microcontroller), and plate body folder occurs
During hand accident, drive the motor of plate body that stall occurs, MCU will detect locked rotor current, so that it is determined that there is hand to be pressed from both sides, MCU is just
The motor of driving plate body can be shut down.But the existing scheme that finger is realized by MCU, software algorithm is needed to intervene, when
Between low-response, it is difficult at the time of capturing current of electric and steeply rise.Meanwhile personal safety protection needs software to realize, product obtains
Take the time cost of relevant authentication and costly.
Support that otherwise the prior art described here is not an admission that these prior arts unless there are sufficient evidence
Before the filing date of the present application for known in the those of ordinary skill of the field that the invention relates to.
【Invention content】
The present invention proposes a kind of improved smoke exhaust ventilator, to solve above-mentioned at least one technical problem.
A kind of smoke exhaust ventilator proposed by the present invention, including air inlet, for the plate body of closing the air inlet and for driving
The motor of the plate body is moved, further includes current of electric sampling module and signal comparing unit；The current of electric sampling module, packet
Include the sampling resistor for the supply line for being serially connected with the motor；The current of electric sampling module is arranged to be used for output institute
State the sample voltage value at sampling resistor both ends；The signal comparing unit is arranged to be used for receiving the sample voltage value simultaneously
The sample voltage value and its pre-set voltage threshold are compared, and in the sample voltage value more than or equal to described
The signal comparing unit sends out instruction so that the motor stalls or reversion during voltage threshold.The current of electric sampling
Module is arranged to be used for the voltage value being converted to motor current signal on the sampling resistor, and is sent to the signal
Comparing unit.Technical solution using the present invention, when clamp hand risk occurs can quick response, can also reduce cost.
Optionally, the signal comparing unit is arranged in use in the sample voltage value more than or equal to the electricity
Instruction is sent out when pressing threshold value to disconnect the supply line of the motor.
Optionally, the signal comparing unit includes comparator or subtracter or operational amplifier.
Optionally, the voltage threshold includes finger voltage threshold or sealing voltage threshold value.
Optionally, the voltage threshold include finger voltage threshold and sealing voltage threshold value, and by alternatively be used for
The sample voltage value is compared；The finger voltage threshold is less than the sealing voltage threshold value.
Optionally, position switch is further included, is arranged to be suitable for move during the plate body closes the air inlet
Triggered when moving trigger position by the plate body, and by with the voltage threshold that the sample voltage value is compared by the anti-pinch
Hand voltage threshold switches to the sealing voltage threshold value；Alternatively, further including Hall sensor, it is arranged to be suitable for detecting
State the voltage that when being moved to trigger position during plate body closes the air inlet, will be compared with the sample voltage value
Threshold value switches to the sealing voltage threshold value by the finger voltage threshold.In this way, while finger is realized, can also have
Effect closing air inlet.
Optionally, the signal comparing unit includes first comparator and the second comparator；The finger voltage threshold
It is pre-set at the first comparator；The sealing voltage threshold value is pre-set at second comparator.
Optionally, position switch and micro controller unit are further included；The position switch is electrically connected to the microcontroller
Unit, the micro controller unit are electrically connected to the signal comparing unit；The position switch is arranged to be suitable for described
Plate body is triggered when being moved to trigger position during closing the air inlet by the plate body, and to the micro controller unit
Send out position signal；During the plate body closes the air inlet, before the plate body is moved to the trigger position, institute
Stating micro controller unit selects the finger voltage threshold to be compared with the sample voltage value；The microcontroller list
Member is arranged in use in after receiving the position signal during the plate body closes the air inlet, described in selection
Sealing voltage threshold value is compared with the sample voltage value.In this way, while finger is realized, can also effectively close into
Air port.
Optionally, micro controller unit is further included and from lock unit；It is described from lock unit, be arranged to be used for based on described
The instruction of signal comparing unit makes the motor stalls or reversion self-locking simultaneously and is sent certainly to the micro controller unit
Lock notification information；It is described from lock unit to be arranged to be used for unlock for the micro controller unit.If it is not provided with the self-locking list
Member, then when leaving the motor off rotation, the electric current of motor can be reduced to zero, if at this point, the institute that signal comparing unit will also receive
It states sample voltage value to be compared with its pre-set voltage threshold, motor can be caused just to have stalled and be just mistakenly considered clamp hand situation
It is excluded.
Optionally, motor control unit is further included, is arranged to be used for based on the micro controller unit and from lock unit
Input control the motor；It is described from lock unit, be arranged to be used for the instruction based on the signal comparing unit to institute
It states motor control unit and sends out motor rotation blockage signal so that the motor stalls or reversion.
Optionally, the motor control unit, further includes inverting module.The setting of inverting module so that clamp hand shape occurs
During condition, motor can invert at once.
Optionally, the current of electric sampling module further includes filter module, is arranged to be used for filtering out the motor and open
Current surge signal when dynamic.
Optionally, the current of electric sampling module further includes surge absoption module, is arranged to be used for absorbing the electricity
Current surge signal when machine starts.
Optionally, the smoke exhaust ventilator is side-absorption type smoke exhaust ventilator.
Optionally, the plate body is smoke deflector.
Optionally, the current of electric sampling module further includes filter circuit and signal amplification circuit, the sampling electricity
Resistance, filter circuit and signal amplification circuit are sequentially connected electrically.
It needs exist for being pointed out, " first ", " second " ... " the 17th " appeared in the specification are only used
In description purpose, it is not used to instruction relative importance；Moreover, it is nor the quantity of the feature limited it defines；
In addition, it is nor the logical relation of the feature limited it or defining for ordinal relation.
The foregoing invention content of the present invention is not intended to all possible embodiments of the description present invention.Entire application
In, many places provide guidance by enumerating example, these examples can be used for various feasible combinations.
【Description of the drawings】
The following drawings only makees schematic illustration and explanation to the present invention, not delimit the scope of the invention, wherein：
Fig. 1 is a kind of structure diagram of the air inlet of smoke exhaust ventilator embodiment of present invention when opening；
Fig. 2 is a kind of structure diagram of the air inlet of smoke exhaust ventilator embodiment of present invention when state is closed；
Fig. 3 is a kind of hardware block diagram of the anti-pinch hand system of smoke exhaust ventilator embodiment of the present invention；
Fig. 4 is a kind of signal comparing unit of anti-pinch hand system of smoke exhaust ventilator embodiment of the present invention and the electricity from lock unit
Lu Tu；
Fig. 5 is a kind of current of electric sampling module of anti-pinch hand system of smoke exhaust ventilator embodiment of the present invention and motor control
The circuit diagram of unit.
Reference numeral：
1- smoke deflectors, 2- filter devices.
【Specific embodiment】
To make the purpose of the present invention, scheme and advantageous effect of greater clarity, below in conjunction with the accompanying drawings and it is preferably implemented
The invention will be further described for example.
A kind of smoke exhaust ventilator embodiment proposed by the present invention, be side-absorption type smoke exhaust ventilator, including can be closed air inlet,
Housing component, wind turbine, oil collector sump tank, filter device 2, current of electric sampling module, signal comparing unit, position switch, microcontroller
Device unit, from lock unit, motor control unit, power circuit, for close the two of air inlet plate bodys and for drive two
The motor of plate body, as shown in Figs. 1-5.Motor is direct current generator.Two plate bodys are smoke deflector 1, are additionally operable to guiding oil smoke and flow into
Air inlet.Power circuit, for providing 5V voltages or other numbers to micro controller unit, from lock unit and signal comparing unit
Chip power voltage.Power circuit is additionally operable to provide 12V voltages or other motor powers electricity to motor control unit and motor
Pressure.
Filter device 2 and two smoke deflectors 1 are obliquely installed.Two smoke deflectors 1 relative to a symmetry axis axisymmetricly.
Two smoke deflectors 1 are used to close air inlet.Each smoke deflector 1 is connected to filter device 2 by sliding rail.Filter device 2 then connects
It is connected to housing component.Wind turbine is set in housing component.The outer surface of two smoke deflectors 1 is in same plane.Two smoke deflectors 1 are located at
The outside of filter device 2, as illustrated in fig. 1 and 2.Air inlet is set between two smoke deflectors 1, as shown in Figure 1.Closing air inlet
Mouthful when, two smoke deflectors 1 in left and right motor drive similarly hereinafter when move towards until be abutted together, complete the envelope to air inlet
It closes, as shown in Figure 2.When air inlet is closed, if opening air inlet, two smoke deflectors 1 in left and right are opposite when motor drives similarly hereinafter
It is mobile.
Current of electric sampling module, including the sampling unit, filter unit and amplifying unit being sequentially connected electrically, such as Fig. 5 institutes
Show.Filter unit is arranged to be used for filtering out current surge signal during electric motor starting.For the present embodiment, current of electric
Sampling module, and can be described as current of electric sampling filter amplifying unit Motor Current Sampling Filter
Amplify Unit, dotted line frame current of electric sampling filter amplifying unit Motor Current Sampling as shown in Figure 3
Shown in structure in Filter Amplify Unit.Sampling unit, the sampling resistor of the supply line including being serially connected with motor
R0.Current of electric sampling module is arranged to be used for the sample voltage value sampled signal at output sampling resistor R0 both ends.
As it can be seen that current of electric sampling module, is arranged to be used for the voltage value being converted to motor current signal on sampling resistor R0
(that is, sample voltage value sampled signal), and it is sent to signal comparing unit.Plate body is driven so as to fulfill by acquisition
The current signal of motor monitors the state in plate body operational process in real time.
Signal comparing unit, is arranged to be used for receiving the sample voltage value that sends of current of electric sampling module and should
Sample voltage value is compared, and be greater than or equal in sample voltage value with the pre-set voltage threshold of signal comparing unit
Signal comparing unit sends out instruction so that motor stalls during voltage threshold.The pre-set voltage threshold of signal comparing unit
Including finger voltage threshold Value 1 and sealing voltage threshold value Value 2, and alternatively it is used to carry out with sample voltage value
Compare.Finger voltage threshold Value 1 is less than sealing voltage threshold value Value 2.Signal comparing unit includes first comparator
Comp1 and the second comparator Comp2, finger voltage threshold Value 1 are pre-set at first comparator Comp1, are closed electricity
Pressure threshold value Value2 is pre-set at the second comparator Comp2.Specifically, the circuit diagram of signal comparing unit, as shown in Figure 4
Shown in structure in dotted line frame signal comparing unit Comparer Unit, including the 12nd resistance R12, the 13rd resistance R13,
14th resistance R14, the 15th resistance R15, first and door Gate4, second and door Gate5, first comparator Comp1, second
Comparator Comp2 and first or door Gate6.First comparator Comp1 and the second comparator Comp2 uses reverse phase comparator.
The reference voltage for being added in the in-phase end of first comparator Comp1 is just considered as pre-set finger voltage threshold Value 1, adds
Just it is considered as pre-set sealing voltage threshold value Value 2 in the reference voltage of the in-phase end of the second comparator Comp2, specifically
Ground, finger voltage threshold Value 1 is by the 12nd resistance R12 and the 13rd resistance R13 partial pressure settings, sealing voltage threshold value
Value 2 is set by the 14th resistance R14 and the 15th resistance R15 partial pressures, as shown in Figure 4.The reverse phase of first comparator Comp1
End receives sample voltage value sampled signal, and the reverse side of the second comparator Comp2 also receives sample voltage value sampled
signal.An input terminal of first and door Gate4 is electrically connected to the output terminal of first comparator Comp1, first and door Gate4
Another input terminal receive micro controller unit send the first enable signal MCU Enable Signal 1.Second and door
An input terminal of Gate5 is electrically connected to the output terminal of the second comparator Comp2, another input terminal of second and door Gate5
Receive the second enable signal MCU Enable Signal 2 that micro controller unit is sent.First with the output terminal of door Gate4 and
The output terminal of second and door Gate5 is used separately as an input terminal of first or door Gate6.First or the output terminal of door Gate6
It is electrically connected to from lock unit, the output terminal of first or door Gate6 is used to send out instruction (trigger signal trigger to from lock unit
Signal) so that motor stalls.Micro controller unit passes through to the first enable signal MCU Enable Signal 1 and
The control of two enable signal MCU Enable Signal 2, come select first comparator Comp1 or the second comparator Comp2 into
Row comparison operation, and then realize that alternatively selection finger voltage threshold Value 1 or sealing voltage threshold value Value 2 are come with adopting
Sample voltage value sampled signal are compared.Specifically, MCU Enable Signal 1 be logic high, MCU
When Enable Signal 2 are logic low, output finger voltage threshold Value 1 and sample voltage value sampled
The comparison result of signal；MCU Enable Signal 1 are logic low, and MCU Enable Signal 2 are logically high
During level, the comparison result of output sealing voltage threshold value Value 2 and sample voltage value sampled signal.
Position switch is electrically connected to micro controller unit.Position switch is arranged to be suitable for closing air inlet in smoke deflector 1
During triggered by left side smoke deflector 1 when being moved to trigger position, and the voltage threshold that will be compared with sample voltage value
Sealing voltage threshold value is switched to by finger voltage threshold.That is, during smoke deflector 1 closes air inlet, smoke deflector 1 is moved to
During trigger position, 1 trigger position of smoke deflector switch.Specifically, during smoke deflector 1 closes air inlet under the drive of motor
When being moved to trigger position, position switch is triggered by left side smoke deflector 1 and sends out position signal to micro controller unit；Microcontroller
After device unit receives position signal, by the first enable signal MCU Enable Signal 1 and the second enable signal MCU
The control of Enable Signal 2, come realize by with the voltage threshold that sample voltage value is compared by finger voltage threshold
Switch to sealing voltage threshold value (being finger voltage threshold with the voltage threshold that sample voltage value is compared before switching).It leads
When cigarette plate 1 is moved to trigger position during air inlet is opened under the drive of motor, position switch is touched by left side smoke deflector 1
It sends out and sends out position signal to micro controller unit；After micro controller unit receives position signal, pass through letter enabled to first
The control of number MCU Enable Signal 1 and the second enable signal MCU Enable Signal 2, will be with sampling electricity to realize
The voltage threshold that pressure value is compared switches to finger voltage threshold (before switching, with sample voltage value by sealing voltage threshold value
The voltage threshold being compared is sealing voltage threshold value).The selection of trigger position should preferably meet left side smoke deflector 1 and move
During to trigger position, the gap between two smoke deflectors 1 in left and right is sufficiently small and is not that clamp hand accident occurs.
From lock unit, be arranged to be used for the instruction based on signal comparing unit leave the motor off rotation self-locking simultaneously and to
Micro controller unit sends self-locking notification information.Micro controller unit is arranged to be used for sending out unlocking signal to from lock unit
Unlock signal, to unlock from lock unit.Motor control unit is arranged to be used for based on micro controller unit and self-locking
The input of unit controls motor.From lock unit, it is arranged to be used for the instruction based on signal comparing unit and controls list to motor
Member sends out motor rotation blockage signal Motor Block Signal so that motor stalls.As shown in figure 4, include the from lock unit
Five metal oxide semiconductor field effect tube M5, the 6th metal oxide semiconductor field effect tube M6, the 7th metal oxide half
Conductor field-effect tube M7, the 5th diode D5, the 5th capacitance C5, the 16th resistance R16 and the 17th resistance R17.Fifth metal
Oxide semiconductor field effect pipe M5 is P-channel MOSFET, and the 6th metal oxide semiconductor field effect tube M6 is N-channel
MOSFET, the 7th metal oxide semiconductor field effect tube M7 are N-channel MOS FET.The anode of 5th diode D5 is electrically connected to
The first of signal comparing unit or the output terminal of door Gate6, to receive trigger signal trigger signal, the 5th diode D5
Cathode be electrically connected to the grid of the 6th metal oxide semiconductor field effect tube M6, the 7th metal oxide semiconductor field-effect
The drain electrode of pipe M7.The source electrode ground connection of 7th metal oxide semiconductor field effect tube M7.7th metal oxide semiconductcor field effect
Should the grid of pipe M7 be electrically connected to micro controller unit, to receive the unlocking signal unlock that micro controller unit is sent
signal.The source electrode of fifth metal oxide semiconductor field effect pipe M5 connects 5V voltages.Fifth metal oxide semiconductor field is imitated
Should the drain electrode of pipe M5 be electrically connected to one end of the 16th resistance R16, the other end of the 16th resistance R16 is electrically connected to the five or two pole
The cathode of pipe D5.The grid of fifth metal oxide semiconductor field effect pipe M5 is electrically connected to one end of the 17th resistance R17, the
The other end of 17 resistance R17 is electrically connected to the drain electrode of the 6th metal oxide semiconductor field effect tube M6.6th metal aoxidizes
The source electrode ground connection of object semiconductor field M6.One end ground connection of 5th capacitance C5, the other end are electrically connected to the 5th diode D5
Cathode.The drain electrode of 6th metal oxide semiconductor field effect tube M6, for output motor stall signal Motor Block
Signal.It needs to be explained, metal oxide semiconductor field effect tube herein can also be replaced with bipolar transistor
In generation, correspondingly, fifth metal oxide semiconductor field effect pipe M5, are substituted with positive-negative-positive bipolar transistor, the oxidation of the 6th metal
Object semiconductor field M6 and the 7th metal oxide semiconductor field effect tube M7 is substituted with bipolar npn transistor npn npn.
Motor control unit, shown in the structure in dotted line frame Motor Control Unit as shown in Figure 5, including first
Metal oxide semiconductor field effect tube M1, the second metal oxide semiconductor field effect tube M2, third metal oxide are partly led
Body field-effect tube M3, the 4th metal oxide semiconductor field effect tube M4, NOT gate Gate1, the second nor gate Gate2, third or
NOT gate Gate3.First metal oxide semiconductor field effect tube M1 and third metal oxide semiconductor field effect tube M3 is P ditches
Road MOSFET, the second metal oxide semiconductor field effect tube M2 and the 4th metal oxide semiconductor field effect tube M4 are N ditches
Road MOSFET.First metal oxide semiconductor field effect tube M1, the second metal oxide semiconductor field effect tube M2, third gold
Belong to oxide semiconductor field effect pipe M3 and the 4th metal oxide semiconductor field effect tube M4 composition H-bridge circuits, to control electricity
The operating status of machine.The input terminal of NOT gate Gate1, for the motor rotation blockage signal Motor sent received from lock unit
Block Signal.The output terminal of NOT gate Gate1 had not only been electrically connected to an input terminal of the second nor gate Gate2, but also electrical connection
In an input terminal of third nor gate Gate3.Another input terminal of second nor gate Gate2, for receiving microcontroller
The first control motor signal MCU IO1 that unit is sent.Another input terminal of third nor gate Gate3, it is micro- for receiving
The second control motor signal MCU IO2 that controller unit is sent.The output terminal of second nor gate Gate2 and third nor gate
The output terminal of Gate3 is electrically connected in H-bridge circuit, as shown in Figure 5.
When motor rotation blockage, motor control unit receives the motor rotation blockage signal Motor sent from lock unit
Block Signal (for the present embodiment, motor rotation blockage signal Motor Block Signal are low level) so that second
The output of nor gate Gate2 and third nor gate Gate3 are 0, at this point, H-bridge circuit will not have output voltage, motor stalling.
When motor runs well, motor control unit receives high level (the not motor rotation blockage signal Motor sent from lock unit
Block Signal), at this point, controlling H by the first control motor signal MCU IO1 and the second control motor signal MCU IO2
The output of bridge circuit, the first control motor signal MCU IO1 are high level and the second control motor signal MCU IO2 are low level
When motor rotate forward, the first control motor signal MCU IO1 are low level and the second control motor signal MCU IO2 when being high level
Motor reversal, it is electric when the first control motor signal MCU IO1 are low level and the second control motor signal MCU IO2 are low level
Machine stalls, and the first control motor signal MCU IO1 are high level and the second control motor signal MCU IO2 motor when being high level
Stalling.
Before smoke deflector 1 is moved to trigger position during air inlet is closed under the drive of the motor of rotating forward, if occurring
Clamp hand accident, motor rotation blockage, current of electric sampling filter amplifying unit are sent to the sample voltage value increase of signal comparing unit,
Sample voltage value is greater than or equal to finger voltage threshold, and signal comparing unit sends trigger signal trigger to from lock unit
Signal, from lock unit receive trigger signal trigger signal after respectively to motor control unit and micro controller unit
Motor rotation blockage signal Motor Block Signal are sent out, motor control unit receives motor rotation blockage signal Motor Block
Motor stalling is controlled after Signal, then, micro controller unit controls motor letter to the first of control motor control unit conveying
Number MCU IO1 are switched to low level and the second control motor signal MCU IO2 are switched to high level, subsequently, microcontroller list
Member is unlocked to from lock unit hair unlocking signal unlock signal from lock unit, at this point, signal comparing unit is sent out to from lock unit
The signal sent changes (signal comparing unit to the signal sent from lock unit non-touch signalling), from lock unit to motor
The signal that control unit is sent also changes, and (signal sent from lock unit to motor control unit believe by non-motor rotation blockage
Number), and then motor reversal.It needs to be explained, before this, micro controller unit sends out unlocking signal unlock to from lock unit
Signal unlocks are from lock unit, and then, micro controller unit controls motor signal to the first of control motor control unit conveying
MCU IO1 be switched to low level and second control motor signal MCU IO2 be switched to high level, and then make motor reversal and
Feasible.
It the above is only the preferred embodiment of the present invention, certain technical characteristics increased, are deleted, modifications or substitutions may be used also
To obtain other embodiments.Such as or, position switch is electrically connected to signal comparing unit, by the position switch Lai straight
It connects and alternatively selects finger voltage threshold or sealing voltage threshold value more single as the signal being compared with sample voltage value
The voltage threshold of member.For another example or, signal comparing unit is arranged in use in sample voltage value and is greater than or equal to electricity
Instruction is sent out when pressing threshold value to disconnect the supply line of motor (not via motor control unit).Specifically, control is provided with to open
Close control motor supply line break-make, signal comparing unit sends out instruction to disconnect the power supply of motor to control switch
Circuit, for example, control switch can be realized by MOSFET or relay etc..For another example or, current of electric
Sampling module further includes surge absoption module, is arranged to be used for absorbing current surge signal during electric motor starting.For another example, also may be used
To be, signal comparing unit includes subtracter.For another example or, signal comparing unit includes operational amplifier.For another example,
One comparator Comp1, which can also be used, to be suitable for the application of in the other types of comparator of the present invention.For another example, the second comparator
Comp2, which can also be used, to be suitable for the application of in the other types of comparator of the present invention.For another example, for another example, realized from lock unit
Function can also be substituted by delay unit；Specifically, signal comparing unit is instructed so that during motor stalls sending out,
The delay unit is used to, by the transmission certain time of the instruction, MCU be made during this period of time to have handled the institute of stall failure
There is operation.For another example or, position switch is arranged to be suitable for be moved to during smoke deflector closes air inlet tactile
It is triggered, and will be cut by finger voltage threshold with the voltage threshold that sample voltage value is compared by right side smoke deflector when sending out position
Shift to sealing voltage threshold value.For another example or, position switch is arranged to be suitable for the process in smoke deflector closing air inlet
In triggered by smoke deflector when being moved to trigger position, and directly will be with sampling electricity through logic circuit (not via micro controller unit)
The voltage threshold that pressure value is compared switches to sealing voltage threshold value by finger voltage threshold.For another example or, first controls
Motor signal MCU IO1 processed are high level and the second control motor signal MCU IO2 motor reversal, the first control when being low level
Motor signal MCU IO1 be low level and the second control motor signal MCU IO2 when being high level motor rotate forward.For another example, also may be used
Only to set one piece of plate body, three pieces or more of plate body can also be set, moreover, the mode of plate body closing air inlet, also not with
The present embodiment is limited, for example, it is also possible to be plate body by inwardly rotating, outward rotation, upward sliding, slide downward, inwardly move
It is dynamic or the modes such as be displaced outwardly to close air inlet.For another example, current scheme is that signal comparing unit sends instructions and first stops motor
Only, in fact or, signal comparing unit sends instructions and motor is made directly to invert (realize this " directly reversion " not via micro-
Controller unit), and to realize this " directly reversion ", must by the second nor gate Gate2 and third of " motor control unit " or
NOT gate Gate3 be respectively substituted for or door (XOR gate can also be used, depending on motor current signal exceed voltage threshold when
The Motor Block Signal signals that comparator unit circuit is sent out are logic low or logic high).
Need annotated division rather than the object for being division of the present invention about each function module, being only a kind of function
Manage the division in structure.Each function module, which can be independent from each other, to be physically present or is physically having intersection,
It can also be same to be physically present, as long as can be used to implement technical scheme of the present invention.
It is that the present invention should not be construed as being limited to embodiment described above to need annotated, but
Should be understood that cover the claims in the present invention combination specification disclosure and determining all possible performance.
Therefore, every content without departing from technical solution of the present invention, technical spirit according to the present invention are appointed to what above example was made
What simple modification, equivalent variation and modification belongs to the protection domain of technical solution of the present invention.
Claims (16)
1. a kind of smoke exhaust ventilator, the electricity including air inlet, for the plate body of closing the air inlet and for driving the plate body
Machine, it is characterised in that：
Further include current of electric sampling module and signal comparing unit；
The current of electric sampling module, the sampling resistor of the supply line including being serially connected with the motor；
The current of electric sampling module is arranged to be used for exporting the sample voltage value at the sampling resistor both ends；
The signal comparing unit is arranged to be used for receiving the sample voltage value and sets the sample voltage value in advance with it
The voltage threshold put is compared, and the signal is more single when the sample voltage value is greater than or equal to the voltage threshold
Member sends out instruction so that the motor stalls or reversion.
2. smoke exhaust ventilator according to claim 1, it is characterised in that：
The signal comparing unit is sent out when being arranged in use in the sample voltage value more than or equal to the voltage threshold
Instruct the supply line to disconnect the motor.
3. smoke exhaust ventilator according to claim 1, it is characterised in that：
The signal comparing unit includes comparator or subtracter or operational amplifier.
4. smoke exhaust ventilator according to claim 1, it is characterised in that：
The voltage threshold includes finger voltage threshold or sealing voltage threshold value.
5. smoke exhaust ventilator according to claim 1, it is characterised in that：
The voltage threshold includes finger voltage threshold and sealing voltage threshold value, and is alternatively used for and the sampled voltage
Value is compared；
The finger voltage threshold is less than the sealing voltage threshold value.
6. smoke exhaust ventilator according to claim 5, it is characterised in that：
Position switch is further included, is arranged to be suitable for be moved to trigger position during the plate body closes the air inlet
When triggered by the plate body, and will be cut with the voltage threshold that the sample voltage value is compared by the finger voltage threshold
Shift to the sealing voltage threshold value；Alternatively,
Hall sensor is further included, is arranged to be suitable for be moved to during detecting that the plate body closes the air inlet
It is described by being switched to the voltage threshold that the sample voltage value is compared by the finger voltage threshold during trigger position
Sealing voltage threshold value.
7. smoke exhaust ventilator according to claim 5, it is characterised in that：
The signal comparing unit includes first comparator and the second comparator；
The finger voltage threshold is pre-set at the first comparator；
The sealing voltage threshold value is pre-set at second comparator.
8. smoke exhaust ventilator according to claim 7, it is characterised in that：
Further include position switch and micro controller unit；
The position switch is electrically connected to the micro controller unit, and the micro controller unit is electrically connected to the signal and compares
Unit；
The position switch is arranged to be suitable for when being moved to trigger position during the plate body closes the air inlet
It is triggered by the plate body, and position signal is sent out to the micro controller unit；
During the plate body closes the air inlet, before the plate body is moved to the trigger position, the microcontroller
Finger voltage threshold described in device Unit selection is compared with the sample voltage value；
The micro controller unit is arranged in use in during the plate body closes the air inlet and receives institute's rheme
After confidence number, the sealing voltage threshold value is selected to be compared with the sample voltage value.
9. smoke exhaust ventilator according to claim 1, it is characterised in that：
Further include micro controller unit and from lock unit；
It is described from lock unit, being arranged to be used for the instruction based on the signal comparing unit makes the motor stalls or anti-
Turn self-locking simultaneously and send self-locking notification information to the micro controller unit；
It is described from lock unit to be arranged to be used for unlock for the micro controller unit.
10. smoke exhaust ventilator according to claim 9, it is characterised in that：
Motor control unit is further included, is arranged to be used for the input based on the micro controller unit and from lock unit to control
The motor；
It is described from lock unit, be arranged to be used for the instruction based on the signal comparing unit and sent out to the motor control unit
Motor rotation blockage signal is so that the motor stalls or reversion.
11. smoke exhaust ventilator according to claim 10, it is characterised in that：
The motor control unit, further includes inverting module.
12. smoke exhaust ventilator according to claim 1, it is characterised in that：
The current of electric sampling module further includes filter module, is arranged to be used for filtering out the electric current wave during electric motor starting
Gush signal.
13. smoke exhaust ventilator according to claim 1, it is characterised in that：
The current of electric sampling module further includes surge absoption module, is arranged to be used for absorbing the electricity during electric motor starting
Flow surging signal.
14. smoke exhaust ventilator according to claim 1, it is characterised in that：
The smoke exhaust ventilator is side-absorption type smoke exhaust ventilator.
15. smoke exhaust ventilator according to claim 14, it is characterised in that：
The plate body is smoke deflector (1).
16. smoke exhaust ventilator according to claim 1, it is characterised in that：
The current of electric sampling module, further includes filter circuit and signal amplification circuit, the sampling resistor, filter circuit and
Signal amplification circuit is sequentially connected electrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223502.6A CN108240644B (en) | 2016-12-27 | 2016-12-27 | Smoke exhaust ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611223502.6A CN108240644B (en) | 2016-12-27 | 2016-12-27 | Smoke exhaust ventilator |
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| Publication Number | Publication Date |
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| CN108240644A true CN108240644A (en) | 2018-07-03 |
| CN108240644B CN108240644B (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611223502.6A Active CN108240644B (en) | 2016-12-27 | 2016-12-27 | Smoke exhaust ventilator |
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| Country | Link |
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| CN (1) | CN108240644B (en) |
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| CN111006286A (en) * | 2020-01-03 | 2020-04-14 | 宁波方太厨具有限公司 | Fume exhaust fan |
| CN112769363A (en) * | 2020-12-30 | 2021-05-07 | 四川工商学院 | Fire monitor motor drive and protection circuit |
| CN115499573A (en) * | 2022-09-19 | 2022-12-20 | 杭州海康威视数字技术股份有限公司 | Video camera |
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