CN102155753A - Anti-clamping system for movable smoke collecting hood of range hood and anti-clamping control method of anti-clamping system - Google Patents
Anti-clamping system for movable smoke collecting hood of range hood and anti-clamping control method of anti-clamping system Download PDFInfo
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Abstract
The invention relates to an anti-pinch system of a movable smoke collecting hood of a range hood and an anti-pinch control method thereof, which comprise a machine body, the movable smoke collecting hood, an opening and closing mechanism and an anti-pinch control circuit, and are characterized in that the anti-pinch control circuit comprises a power supply circuit for providing direct current working voltage for the following circuits, a position detection circuit, an anti-pinch detection circuit, keys and a display circuit, a microcontroller circuit for respectively receiving and processing signals of the position detection circuit, the anti-pinch detection circuit, the keys and the display circuit, a direct current motor driving circuit for receiving output signals of the microcontroller circuit, and a direct current motor driven by the direct current motor driving circuit. The invention has the advantages of simple structure, low cost, high reliability, strong practicability and the like.
Description
Technical field
The present invention relates to a kind of range hood electrical control and method thereof, particularly a kind of range hood active set petticoat pipe anti-clipping system and anti-clip control method thereof.
Background technology
The exhaust fume collecting hood range hood of folding automatically has advantages such as fashion, attractive in appearance, innervation, be subjected to especially liking of young consumers of many consumers, but there is the potential safety hazard that crushes the people or press from both sides bad article in the exhaust fume collecting hood of this range hood owing to adopt motor-driven when exhaust fume collecting hood is closed.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and a kind of simple in structure, with low cost, good reliability is provided, do not have a kind of range hood active set petticoat pipe anti-clipping system and the anti-clip control method thereof that crush the people or press from both sides bad article phenomenon.
In order to achieve the above object, a kind of technical scheme of the present invention is achieved in that a kind of range hood active set petticoat pipe anti-clipping system, comprise fuselage, the active set petticoat pipe, open-and-close mechanism and anti-pinch control circuit are formed, it is characterized in that described anti-pinch control circuit is included as the power circuit that following circuit provides direct-current working volts, position detecting circuit, anti-pinch testing circuit and button and display circuit, also comprise receiving position testing circuit respectively, the signal of anti-pinch testing circuit and button and display circuit and the microcontroller circuit of handling, receive the direct current motor drive circuit of microcontroller circuit output signal, the direct current generator that driven by direct current motor drive circuit.
Above-mentioned microcontroller circuit comprises microcontroller, ceramic resonator, second and third electric capacity, the 4th to the 6th resistance; Wherein, the power pin Vss of microcontroller and Vdd are connected with+5V with GND respectively, the reseting pin RESET of microcontroller is connected with an end of second electric capacity and the 4th resistance simultaneously, another termination GND of second electric capacity, another termination+5V of the 4th resistance, the external oscillator interface Xin of microcontroller and Xout respectively with 1 of ceramic resonator, 3 pins connect, 2 pins of ceramic resonator meet GND, the P0.0 of microcontroller, the P0.1 pin is connected with an end of the 5th resistance and the 6th resistance respectively, the 5th, the other end of six resistance is connected with button and display circuit, and the 3rd electric capacity is parallel between the other end and GND of the 5th resistance.
Described position detecting circuit comprises first microswitch, second microswitch, first junction block, first to the 3rd resistance and first electric capacity; Wherein, the COM end of first and second two microswitches is electrically connected with an end of the 3rd resistance simultaneously, the other end of the 3rd resistance directly meets GND, first electric capacity is parallel between microswitch COM end and the GND, the normally opened contact NO of second microswitch and first resistance are electrically connected the back and are connected with+5V, the normally opened contact NO of first microswitch is connected the back and is connected with+5V with second resistance, the COM of two microswitches holds the while to be connected with the P0.4 of microcontroller in the microcontroller circuit.
Above-mentioned direct current motor drive circuit comprises darlington array, drop-down exclusion, first relay, second relay, transistor, the 4th electric capacity, the 7th to the 9th resistance; 8 of wherein said darlington array, No. 9 pins connect respectively GND and+12V, 4, No. 5 pin is electrically connected with the two ends of drop-down exclusion, they are 12 years old, No. 13 pin connects first respectively, one input of two relays, the public termination GND of drop-down exclusion, second, another input of two relays all connects+12V, two normally opened contacts of first relay respectively with "+" of direct current generator, "-" binding post connects, two normally opened contacts of second relay then respectively with "-" of direct current generator, "+" binding post connects, be connected in "+" of direct current generator after the 9th resistance and the 4th capacitances in series, on "-" binding post, the base stage of transistor is connected with No. 4 pins of darlington array after connecing the 8th resistance, the colelctor electrode of transistor is connected with No. 5 pins of the 7th resistance and darlington array simultaneously, the other end of the 7th resistance is connected with the P2.1 of microcontroller in the microcontroller circuit, and the emitter stage of transistor Q1 directly meets GND.
Above-mentioned anti-pinch testing circuit comprises sampling resistor, current-limiting resistance, Zener diode and filter capacitor; Wherein, one termination GND of sampling resistor, the public terminal of another first and second relay of termination, the public terminal of current-limiting resistance one first and second relay of termination, the P0.7 of microcontroller in another termination microcontroller circuit, Zener diode and filter capacitor all are connected in the two ends of sampling resistor.
Its anti-clamping method is, when the parameter of anti-pinch testing circuit detection is the current value of direct current generator, the pass closed procedure of active set petticoat pipe is divided into three zones from the time, separation is can effectively avoid the moment t1 of electric motor starting electric current and trigger the moment t2 that closes the microswitch that puts in place, above-mentioned anti-pinch effective coverage is meant the zone between t1 and the t2, and the anti-pinch control algolithm has following two kinds in the anti-pinch effective coverage:
Algorithm A: preestablish a threshold value Imax, detect the current value I of direct current generator in real time, every K sample is got arithmetic mean of instantaneous value Iav one time, to reduce the influence of current noise, as Iav〉during Imax, microcontroller promptly is judged as and clips to people or article, controls the motor-driven exhaust fume collecting hood immediately and stops or stopping earlier afterwards opening;
Algorithm B: preestablish a threshold value Dmax, detect the current value I of direct current generator in real time, every K sample is got arithmetic mean of instantaneous value Iav one time, to reduce the influence of current noise, the mean value of each group sample and the mean value of last one group of sample are the poor D that obtains, if difference D is during greater than preset threshold Dmax, microcontroller promptly is judged as and clips to people or article, controls the motor-driven exhaust fume collecting hood immediately and stops or stopping earlier afterwards opening.
When the active set petticoat pipe is closed, the working status parameter of the real-time detected set petticoat pipe of anti-pinch testing circuit also feeds back to microcontroller, in the anti-pinch effective coverage, when clipping to foreign matter and clamping force between exhaust fume collecting hood and fuselage above certain value, this value needs to adjust according to actual conditions, do not judge by accident in the assurance pinch resistant functionality, and consider under the situation of machine ages resistance meeting nature increase, select the value of a minimum, microcontroller can judge accurately that it is malfunction and controls rapidly and reverse after DC speed-reducing stops or stopping.
The parameter that above-mentioned anti-pinch testing circuit detects in real time can be for reflecting the parameter of the dynamics that clamps between active set petticoat pipe and the fuselage, as analog signalses such as the current value of direct current generator, force value that the exhaust fume collecting hood end is subjected to, motor output torque values, or the switching value signal that provides of microswitch, the active set petticoat pipe can be upset, translation, lifting, flexible or compound motion.
The present invention can realize the significantly raising of properties of product with very cheap cost, has very strong practical value and economic worth, and is safe in utilization, reliable, do not have the phenomenon that crushes the people or press from both sides bad article.
Description of drawings
Fig. 1 forms schematic diagram for the anti-pinch control circuit;
Fig. 2 is an embodiment of the invention position detecting circuit schematic diagram;
Fig. 3 is an embodiment of the invention microcontroller circuit schematic diagram.
Fig. 4 drives and anti-pinch testing circuit schematic diagram for embodiment of the invention direct current generator;
Fig. 5 is embodiment of the invention power circuit principle figure;
Fig. 6 is embodiment of the invention button and display circuit schematic diagram;
Fig. 7 is an embodiment of the invention anti-pinch effective coverage distribution schematic diagram;
The structural representation that Fig. 8 closes at exhaust fume collecting hood fully for the embodiment of the invention;
Fig. 9 is the structural representation of the embodiment of the invention when the exhaust fume collecting hood complete opening;
Figure 10 is the relative casing flip-flop movement of an exhaust fume collecting hood mode schematic diagram;
Figure 11 is the relative casing translational motion of an exhaust fume collecting hood mode schematic diagram;
Figure 12 is the relative casing elevating movement of an exhaust fume collecting hood mode schematic diagram;
Figure 13 is the relative casing stretching motion of an exhaust fume collecting hood mode schematic diagram.
The specific embodiment
The invention will be further described below by specific embodiment.
Embodiment one
As Fig. 1,8, shown in 9, it is a kind of range hood active set petticoat pipe anti-clipping system, comprise fuselage 1, active set petticoat pipe 2, open-and-close mechanism 3 and anti-pinch control circuit are formed, characteristics of the present invention are that described anti-pinch control circuit is included as the power circuit that following circuit provides direct-current working volts, position detecting circuit, anti-pinch testing circuit and button and display circuit, also comprise receiving position testing circuit respectively, the signal of anti-pinch testing circuit and button and display circuit and the microcontroller circuit of handling, receive the direct current motor drive circuit of microcontroller circuit output signal, the direct current generator that driven by direct current motor drive circuit.Can hide when the active set petticoat pipe refers to close or hide air inlet, can expose air inlet during unlatching, strengthen holding together the parts of cigarette effect, convenient for dismounting and washing inner body (as oily net, impeller etc.), its open and close movement is by motor-driven.
Direct current generator adopts direct current 12V magneto, rated output power 6.8W, and decelerator employing speed reducing ratio is 268.8 turbine and worm decelerator.
As shown in Figure 5, power circuit adopts switch power module, input AC 220V, output+5V and+12V, rated power 30W.
As shown in Figure 3, microcontroller circuit comprises microcontroller U1, ceramic resonator OSC1, second and third capacitor C 2, C3, the 4th to the 6th resistance R 4, R5 and R6.The power pin Vss of microcontroller and Vdd are connected with+5V with GND respectively, the reseting pin RESET of microcontroller is connected with the end of second capacitor C 2 with the 4th resistance R 4 simultaneously, another termination GND of second capacitor C 2, another termination+5V of the 4th resistance R 4, the external oscillator interface Xin of microcontroller and Xout respectively with 1 of ceramic resonator, 3 pins connect, 2 pins of ceramic resonator meet GND, the P0.0 of microcontroller, the P0.1 pin is connected with the end of the 5th resistance R 5 and the 6th R6 respectively, the other end of the 5th resistance R 5 and the 6th resistance R 6 is connected with button and display circuit, the 3rd capacitor C 3 is parallel between the other end and GND of the 5th resistance R 5, the P0.4 of microcontroller, P0.7, P2.1, P2.2 respectively with position detecting circuit in the 3rd R3, current-limiting resistance R11 in the anti-pinch testing circuit, the 7th resistance R 7 in the direct current motor drive circuit is connected with the 8th resistance R 8.Microcontroller adopts S3F9454, and the ceramic resonator frequency is 8MHz.
As shown in Figure 2, position detecting circuit comprises the first microswitch SM1, the second microswitch SM2, junction block CN1, first resistance R 1, second resistance R 2, the 3rd resistance R 3 and first capacitor C 1.Wherein, the COM end of two microswitches is connected with an end of the 3rd resistance R 3 simultaneously, the other end of the 3rd resistance R 3 directly meets GND, first capacitor C 1 is parallel between microswitch COM end and the GND, the normally opened contact NO of first microswitch is connected the back and is connected with+5V with first resistance R 1, the normally opened contact NO of second microswitch is connected the back and is connected with+5V with second resistance R 2, the COM of two microswitches holds the while to be connected with the P0.4 of microcontroller in the microcontroller circuit.
As shown in Figure 4, direct current motor drive circuit comprises darlington array U2, drop-down exclusion RP1, the first relay R EL1, the second relay R EL2, transistor Q1, the 4th capacitor C 4, the 7th resistance R 7, the 8th resistance R 8 and the 9th resistance R 9.Wherein, 8 of darlington array, No. 9 pins connect respectively GND and+12V, 4, No. 5 pin is connected with drop-down exclusion, 12, No. 13 pin connects first respectively, two relay R EL1, the input of REL2, the public termination GND of drop-down exclusion, first, two relay R EL1, another input of REL2 all connects+12V, two normally opened contacts of the first relay R EL1 respectively with "+" of direct current generator M1, "-" binding post connects, two public terminals of the first relay R EL1 connect respectively+meet GND behind the sampling resistor R10 in 12V and the anti-pinch testing circuit, two normally opened contacts of the second relay R EL2 then respectively with "-" of direct current generator M1, "+" binding post connects, two public terminals of the second relay R EL2 connect respectively+meet GND behind the sampling resistor R10 in 12V and the anti-pinch testing circuit, be connected in "+" of direct current generator after the 9th resistance R 9 and 4 series connection of the 4th capacitor C, on "-" binding post, the base stage of transistor Q1 connects the 8th resistance R 8 backs and is connected with No. 4 pins of darlington array, the colelctor electrode of transistor Q1 is connected with No. 5 pins of the 7th resistance R 7 and darlington array simultaneously, the other end of the 7th resistance R 7 is connected with the P2.1 of microcontroller in the microcontroller circuit, the emitter-base bandgap grading of transistor Q1 directly meets GND, and darlington array is selected ULN2003A for use.
As shown in Figure 4, the anti-pinch testing circuit comprises sampling resistor R10, current-limiting resistance R11, Zener diode ZD1 and filter capacitor C5.Wherein, the termination GND of sampling resistor R10, the public terminal of first and second relay R of another termination EL1, REL2, the public terminal of first and second relay R of current-limiting resistance R11 one termination EL1, REL2, the P0.7 of microcontroller in another termination microcontroller circuit, Zener diode ZD1 and filter capacitor C5 all are connected in the two ends of sampling resistor R10, and adopting resistance is 0.2 ohm.
As shown in Figure 6, button and display circuit are driven chip U5, light-emitting diode display LED1, ceramic resonator OSC2, resistance R 12～R18 and capacitor C 6～C12 and are formed by induction spring K1～K6, touch key-press detection chip U3, microcontroller U4, LED.Because micro controller I/O mouth carries pull-up resistor in inside, button detection chip delivery outlet no longer is provided with pull-up resistor, the touch key-press detection chip adopts TS08N, microcontroller adopts S3F9454, LED drives chip and adopts TM1268, the pottery vibration frequency is 8MHz, and other peripheral circuit all according to each chip typical application circuit design, repeats no more.
The anti-clip control method of range hood active set petticoat pipe anti-clipping system, characteristics of the present invention are when the parameter of anti-pinch testing circuit detection is the current value of direct current generator, the pass closed procedure of active set petticoat pipe is divided into three zones from the time, separation is can effectively avoid the moment t1 of electric motor starting electric current and trigger the moment t2 that closes the microswitch that puts in place, above-mentioned anti-pinch effective coverage is meant the zone between t1 and the t2, and the anti-pinch control algolithm has following two kinds in the anti-pinch effective coverage:
Algorithm A: preestablish a threshold value Imax, detect the current value I of direct current generator in real time, every K sample is got arithmetic mean of instantaneous value Iav one time, to reduce the influence of current noise, as Iav〉during Imax, microcontroller promptly is judged as and clips to people or article, controls the motor-driven exhaust fume collecting hood immediately and stops or stopping earlier afterwards opening; Following middle for example the abbreviation, clip to,
Obtaining three groups of samples when for example getting K=3 is 0.3A, 0.4A, 0.5A; 0.7A, 0.8A, 0.9A; 1.0A, 1.1A, 1.2A; Threshold value Imax gets 0.8A.
First group of Iav=(0.3+0.4+0.5)/3=0.4A, Iav＜Imax is judged as normal;
Second group of Iav=(0.7+0.8+0.9)/3=0.8A, Iav=Imax is judged as normal;
The 3rd group of Iav=(1.0+1.1+1.2)/3=1.1A; Iav〉Imax, be judged as and clip to;
When exhaust fume collecting hood does not clip to people or thing, and system is judged as and clips to, and then is erroneous judgement.
The method that adopts examination to gather in the system debug stage of threshold value Imax obtains, Imax is since 0, increase progressively examination with 0.1A and gather that (what this method adopted is 8 bit A/D converters, the reference voltage of AD converter is 5V, the sampling resistor resistance is 0.2 Europe, so select to increase progressively with 0.1A, if the figure place of AD converter, different in AD conversion reference voltage and sampling resistor resistance and this method, can suitably adjust incremental change), system does not judge by accident in whole anti-pinch effective coverage appears in system for the first time, add a safety value on this basis, can be with assurance because of the erroneous judgement that causes of system aging, for example the Imax that system does not judge by accident in the whole anti-pinch of the system's first appearance effective coverage is 1A, safety value is got 0.2A, then final threshold value Imax gets 1.2A, and Imax was a definite value after debugging was finished.
Algorithm B: preestablish a threshold value Dmax, detect the current value I of direct current generator in real time, every K sample is got arithmetic mean of instantaneous value Iav one time, to reduce the influence of current noise, it is poor that the mean value of each group mean value of sample and last one group of sample is done, if difference is during greater than preset threshold Dmax, microcontroller promptly is judged as and clips to people or article, controls the motor-driven exhaust fume collecting hood immediately and stops or stopping earlier afterwards opening.Following middle for example the abbreviation, clip to.
Obtaining four groups of samples when for example getting K=4 is 0.5A, 0.6A, 0.7A; 0.7A, 0.8A, 0.9A; 1.0A, 1.1A, 1.2A; 1.5A, 1.6A, 1.7A threshold value Dmax gets 0.3A.
First and second organizes D=(0.7+0.8+0.9)/3-(0.5+0.6+0.7)/3=0.2A, and D＜Dmax is judged as normal;
Second and third organizes D=(1.0+1.1+1.2)/3-(0.7+0.8+0.9)/3=0.3A, and D=Dmax is judged as normal;
Third and fourth organizes D=(1.5+1.6+1.7)/3-(1.0+1.1+1.2)/3=0.5A; Iav〉Imax, be judged as and clip to;
First group of data front do not have and can not make a decision for doing poor data.
When exhaust fume collecting hood does not clip to people or thing, and system is judged as and clips to, and then is erroneous judgement.
The method that adopts examination to gather in the system debug stage of threshold value Dmax obtains, Dmax is since 0, increase progressively examination with 0.1A and gather that (what this method adopted is 8 bit A/D converters, the reference voltage of AD converter is 5V, the sampling resistor resistance is 0.2 Europe, so select to increase progressively with 0.1A, if the figure place of AD converter, different in AD conversion reference voltage and sampling resistor resistance and this method, can suitably adjust incremental change), system does not judge by accident in whole anti-pinch effective coverage appears in system for the first time, add a safety value on this basis, can be with assurance because of the erroneous judgement that causes of system aging, for example the Dmax that system does not judge by accident in the whole anti-pinch of the system's first appearance effective coverage is 0.3A, safety value is got 0.2A, then final threshold value Dmax gets 0.5A, and Dmax was a definite value after debugging was finished.
That adopt in the present embodiment is algorithm A, and sample number K value is 50, and threshold value Imax value is 1.2A.
When the active set petticoat pipe is closed, the working status parameter of the real-time detected set petticoat pipe of anti-pinch testing circuit also feeds back to microcontroller, in the anti-pinch effective coverage, when clipping to foreign matter and clamping force between exhaust fume collecting hood and fuselage above certain value, adjust according to actual conditions, do not judge by accident in the assurance pinch resistant functionality, and consider under the situation of machine ages resistance meeting nature increase, select the value of a minimum, microcontroller can judge accurately that it is malfunction and controls rapidly and reverse after DC speed-reducing stops or stopping.
The parameter that above-mentioned anti-pinch testing circuit detects in real time can be for reflecting the parameter of the dynamics that clamps between active set petticoat pipe and the fuselage, as analog signalses such as the current value of direct current generator, force value that the exhaust fume collecting hood end is subjected to, motor output torque values, or the switching value signal that provides of microswitch, it in the present embodiment current value of direct current generator, the active set petticoat pipe can be upset, translation, lifting, flexible or compound motion, and present embodiment adds the compound motion of lifting for upset.
Operation principle of the present invention is as follows:
Position detecting circuit is used for the residing position signalling of real-time detected set petticoat pipe and feeds back to microcontroller, position signalling can be switching value signal or analog signals, microcontroller U1 can judge the state of first and second microswitch and then judge the residing position of exhaust fume collecting hood according to these signals, and corresponding relation is as shown in the table.
In the position detecting circuit as shown in Figure 2, what feed back is voltage signal, the magnitude of voltage of feedback is about 5 * R3/ (R2+R3) volt when first microswitch is closed, the magnitude of voltage of feedback is about 5 * R3/ (R1+R3) volt when second microswitch is closed, and the magnitude of voltage of feedback is about 0 volt when microswitch is all opened up and down.
The anti-pinch testing circuit is used for the duty of real-time detected set petticoat pipe, and detected parameter value fed back to microcontroller, the parameter that detect to detect can be analog signalses such as the current value of direct current generator M1, force value that exhaust fume collecting hood is subjected to, motor output torque value, also can be that infrared type anti-pinch testing circuit or switching regulator anti-pinch testing circuit can detected switching value signals.
Because direct current generator starting current and locked rotor current are all much larger than its rated operational current, and the stall that need lean on the short time when exhaust fume collecting hood is closed guarantees to close tight, so a period of time and exhaust fume collecting hood that the anti-pinch effective coverage need be avoided after the motor counter-rotating starts are closed a period of time before tight, as long as guarantee the situation that in this two time periods, can not press from both sides people's (thing), can guarantee the validity of pinch resistant functionality, anti-pinch effective coverage distribution schematic diagram as shown in Figure 7.Time t1 can obtain also can try to gather acquisition repeatedly in the program debugging stage with the oscillograph actual measurement, time t2 depends on the position of closing the microswitch installation that puts in place, must guarantee simultaneously that microswitch triggers not stall of front motor, microswitch triggers regional little of the situation that can not press from both sides people or thing between back exhaust fume collecting hood and fuselage, otherwise the situation that exhaust fume collecting hood could normally be closed or crush the people, be pressed from both sides bad article can occur.
In the anti-pinch testing circuit as shown in Figure 4, detection be the current value of direct current generator, establishing the magnitude of voltage that the AD_MOT place records is U, then the current value of direct current generator is the U/R10 peace.
The signal of microcontroller circuit integrated location testing circuit and anti-pinch testing circuit feedback is analyzed, and judges whether exhaust fume collecting hood clips to people or article and control the running status of direct current generator.If being analog signals, feedback signal needs to change again through A/D earlier to judge, if feedback signal is that the switching value signal then can directly be judged.
In the microcontroller circuit as shown in Figure 3, P0.4 and P0.7 mouth are as A/D conversion mouth, the analog signals of dislocation testing circuit and anti-pinch testing circuit feedback respectively.P2.1 and P2.2 control direct current generator driving exhaust fume collecting hood respectively and close and open as the I/O mouth.If (a) anti-pinch control algolithm anti-pinch condition establishment (b) exhaust fume collecting hood is in and closes in the closed procedure, (c) exhaust fume collecting hood is in the anti-pinch effective coverage, three conditions satisfy simultaneously, then be judged as and clip to people or article, microcontroller P2.1 and the P2.2 direct current generator of output low level control simultaneously earlier stop, P2.1 output high level P2.2 output low level control direct current generator counter-rotating exhaust fume collecting hood is opened then, and display circuit demonstration failure code is reminded the user.
Direct current motor drive circuit is used to drive the direct current generator forward, reverse or stop to be ended, and then controls exhaust fume collecting hood and open, close or keep, shown in Fig. 8,9.
In the direct current motor drive circuit as shown in Figure 4, P2.1 in the microcontroller circuit, P2.2 port status, transistor Q1 state, 5,6,12, No. 13 pin status of darlington array, the relation of first and second relay R EL1, REL2 state, direct current generator state and exhaust fume collecting hood duty is as shown in the table:
Annotate: " 1 " expression high level in the table, " 0 " expression low level.
Go up table as can be known by table, the existence of Q1 makes which kind of level no matter P2.2 and P2.1 export, the situation of adhesive simultaneously can not appear in first and second relay R EL1, REL2, and the interlocking design on this hardware can avoid REL1 and REL2 adhesive simultaneously to cause the danger of power supply short circuit effectively.
Embodiment two
Shown in Figure 10 to 13, when the open and close movement mode of exhaust fume collecting hood is translation, lifting, upset or when flexible, the installation site of microswitch and the structure of open-and-close mechanism can be different with embodiment 1, but anti-pinch control circuit and control method can directly adopt, only need to adjust individual parameters in case of necessity and get final product, do not elaborate at this.
Claims (8)
1. range hood active set petticoat pipe anti-clipping system, comprise fuselage (1), active set petticoat pipe (2), open-and-close mechanism (3) and anti-pinch control circuit are formed, it is characterized in that described anti-pinch control circuit is included as the power circuit that following circuit provides direct-current working volts, position detecting circuit, anti-pinch testing circuit and button and display circuit, also comprise receiving position testing circuit respectively, the signal of anti-pinch testing circuit and button and display circuit and the microcontroller circuit of handling, receive the direct current motor drive circuit of microcontroller circuit output signal, the direct current generator that driven by direct current motor drive circuit.
2. range hood active set petticoat pipe anti-clipping system according to claim 1 is characterized in that above-mentioned microcontroller circuit comprises microcontroller (U1), ceramic resonator (OSC1), second and third electric capacity (C2), (C3), the 4th to the 6th resistance (R4), (R5), (R6); Wherein, the power pin Vss of microcontroller and Vdd are connected with+5V with GND respectively, the reseting pin RESET of microcontroller is connected with the end of second electric capacity (C2) with the 4th resistance (R4) simultaneously, another termination GND of second electric capacity (C2), another termination+5V of the 4th resistance (R4), the external oscillator interface Xin of microcontroller and Xout respectively with 1 of ceramic resonator, 3 pins connect, 2 pins of ceramic resonator meet GND, the P0.0 of microcontroller, the P0.1 pin is connected with the end of the 5th resistance (R5) with the 6th resistance (R6) respectively, the 5th, six resistance (R5), (R6) the other end is connected with button and display circuit, and the 3rd electric capacity (C3) is parallel between the other end and GND of the 5th resistance (R5).
3. range hood active set petticoat pipe anti-clipping system according to claim 1 and 2 is characterized in that described position detecting circuit comprises first microswitch (SM1), second microswitch (SM2), first junction block (CN1), first to the 3rd resistance (R1), (R2), (R3) and first electric capacity (C1); Wherein, the COM end of first and second two microswitches is connected with an end of the 3rd resistance (R3) simultaneously, the other end of the 3rd resistance (R3) directly meets GND, first electric capacity (C1) is parallel between microswitch COM end and the GND, the normally opened contact NO of second microswitch and first resistance (R1) are electrically connected the back and are connected with+5V, the normally opened contact NO of first microswitch is connected the back and is connected with+5V with second resistance (R2), the COM of two microswitches holds the while to be connected with the P0.4 of microcontroller (U1) in the microcontroller circuit.
4. range hood active set petticoat pipe anti-clipping system according to claim 1 and 2 is characterized in that above-mentioned direct current motor drive circuit comprises darlington array (U2), drop-down exclusion (RP1), first relay (REL1), second relay (REL2), transistor (Q1), the 4th electric capacity (C4), the 7th to the 9th resistance (R7), (R8), (R9); 8 of wherein said darlington array, No. 9 pins connect respectively GND and+12V, 4, No. 5 pin is electrically connected with the two ends of drop-down exclusion, they are 12 years old, No. 13 pin connects first respectively, two relays (REL1), (REL2) a input, the public termination GND of drop-down exclusion, second, two relays (REL1), (REL2) another input all connects+12V, two normally opened contacts of first relay (REL1) respectively with "+" of direct current generator (M1), "-" binding post connects, two normally opened contacts of second relay (REL2) then respectively with "-" of direct current generator (M1), "+" binding post connects, be connected in direct current generator (M1) "+" after the 9th resistance (R9) and the 4th electric capacity (C4) series connection, on "-" binding post, the base stage of transistor (Q1) connects the 8th resistance (R8) back and is connected with No. 4 pins of darlington array, the colelctor electrode of transistor (Q1) is connected with No. 5 pins of the 7th resistance (R7) and darlington array simultaneously, the other end of the 7th resistance (R7) is connected with the P2.1 of microcontroller (U1) in the microcontroller circuit, and the emitter stage of transistor Q1 directly meets GND.
5. range hood active set petticoat pipe anti-clipping system according to claim 4 is characterized in that above-mentioned anti-pinch testing circuit comprises sampling resistor (R10), current-limiting resistance (R11), Zener diode (ZD1) and filter capacitor (C5); Wherein, one termination GND of sampling resistor (R10), the public terminal of first and second relay of another termination (REL1), (REL2), the public terminal of current-limiting resistance (R11) first and second relay of a termination (REL1), (REL2), the P0.7 of microcontroller (U1) in another termination microcontroller circuit, Zener diode (ZD1) and filter capacitor (C5) all are connected in the two ends of sampling resistor (R10).
6. the anti-clip control method of range hood active set petticoat pipe anti-clipping system according to claim 1, it is characterized in that when the parameter of anti-pinch testing circuit detection is the current value of direct current generator, the pass closed procedure of active set petticoat pipe is divided into three zones from the time, separation is can effectively avoid the moment t1 of electric motor starting electric current and trigger the moment t2 that closes the microswitch that puts in place, above-mentioned anti-pinch effective coverage is meant the zone between t1 and the t2, and anti-pinch control method has following two kinds in the anti-pinch effective coverage:
Algorithm A: preestablish a threshold value Imax, detect the current value I of direct current generator in real time, every K sample is got arithmetic mean of instantaneous value Iav one time, to reduce the influence of current noise, as Iav〉during Imax, microcontroller promptly is judged as and clips to people or article, controls the motor-driven exhaust fume collecting hood immediately and stops or stopping earlier afterwards opening;
Algorithm B: preestablish a threshold value Dmax, detect the current value I of direct current generator in real time, every K sample is got arithmetic mean of instantaneous value Iav one time, to reduce the influence of current noise, it is poor that the mean value of each group mean value of sample and last one group of sample is done, if difference is during greater than preset threshold Dmax, microcontroller promptly is judged as and clips to people or article, controls the motor-driven exhaust fume collecting hood immediately and stops or stopping earlier afterwards opening.
7. the anti-clip control method of range hood active set petticoat pipe anti-clipping system according to claim 6, when it is characterized in that the active set petticoat pipe is closed, the working status parameter of the real-time detected set petticoat pipe of anti-pinch testing circuit also feeds back to microcontroller, in the anti-pinch effective coverage, when clipping to foreign matter and clamping force between exhaust fume collecting hood and fuselage above certain value, this value needs to adjust according to actual conditions, do not judge by accident in the assurance pinch resistant functionality, and consider under the situation of machine ages resistance meeting nature increase, select the value of a minimum, microcontroller can judge accurately that it is malfunction and controls rapidly and reverse after DC speed-reducing stops or stopping.
8. the anti-clip control method of range hood active set petticoat pipe anti-clipping system according to claim 6, it is characterized in that the parameter that above-mentioned anti-pinch testing circuit detects in real time can be for reflecting the parameter of the dynamics that clamps between active set petticoat pipe and the fuselage, as analog signalses such as the current value of direct current generator, force value that the exhaust fume collecting hood end is subjected to, motor output torque values, or the switching value signal that provides of microswitch, the active set petticoat pipe can be upset, translation, lifting, flexible or compound motion.
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| CN201110091952A CN102155753B (en) | 2011-04-13 | 2011-04-13 | Anti-clamping system for movable smoke collecting hood of range hood and anti-clamping control method of anti-clamping system |
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| CN201110091952A CN102155753B (en) | 2011-04-13 | 2011-04-13 | Anti-clamping system for movable smoke collecting hood of range hood and anti-clamping control method of anti-clamping system |
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| CN103629719A (en) * | 2013-12-10 | 2014-03-12 | 浙江安德电器有限公司 | Range hood |
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| CN104603544B (en) * | 2012-08-27 | 2017-03-29 | Bsh家用电器有限公司 | Including the fume exhaust device of movable Cooker hood |
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| CN108561931A (en) * | 2018-07-02 | 2018-09-21 | 珠海格力电器股份有限公司 | Smoke deflector control method, device, kitchen ventilator and readable storage medium storing program for executing |
| CN108679679A (en) * | 2018-08-15 | 2018-10-19 | 珠海格力电器股份有限公司 | A kind of face plate of smoke exhaust ventilator folding control system, control method and its range hood |
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