CN112377959A - Motor control method of variable-frequency range hood - Google Patents
Motor control method of variable-frequency range hood Download PDFInfo
- Publication number
- CN112377959A CN112377959A CN202011123070.8A CN202011123070A CN112377959A CN 112377959 A CN112377959 A CN 112377959A CN 202011123070 A CN202011123070 A CN 202011123070A CN 112377959 A CN112377959 A CN 112377959A
- Authority
- CN
- China
- Prior art keywords
- motor
- control method
- range hood
- gear
- variable frequency
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 189
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 67
- 238000006243 chemical reaction Methods 0.000 claims abstract description 56
- 239000000779 smoke Substances 0.000 claims description 21
- 230000003068 static effect Effects 0.000 claims description 15
- 230000007423 decrease Effects 0.000 claims description 10
- 230000009191 jumping Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 20
- 230000001105 regulatory effect Effects 0.000 description 2
- 101000872083 Danio rerio Delta-like protein C Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
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 invention belongs to the technical field of variable frequency range hoods, and particularly relates to a motor control method of a variable frequency range hood, which comprises the following steps: after a frequency conversion plate of the frequency conversion range hood is replaced, whether the frequency conversion range hood can continuously maintain a calibration control method to control the frequency conversion range hood is judged; if yes, a calibration control method is maintained to control the variable-frequency range hood; if not, the variable-frequency range hood is controlled by adopting a segmented control method. The control method of the invention can realize the purpose that one variable frequency cigarette machine can correspond to a plurality of variable frequency boards on the premise of keeping the communication parameters between the variable frequency cigarette machine and the variable frequency boards unchanged, and effectively solves the problem that the existing control method of the variable frequency cigarette machine can not be compatible with the variable frequency boards of different companies. For the complete machine of the frequency conversion cigarette machine, the frequency conversion plate is only required to be replaced in the embodiment, other parts do not need to be additionally replaced, for example, the electric control plate is replaced, the instant use is realized, and the trouble of newly opening materials is reduced.
Description
Technical Field
The invention belongs to the technical field of variable frequency range hoods, and particularly relates to a motor control method of a variable frequency range hood and the variable frequency range hood.
Background
At present, most direct current variable frequency range hood adopts an Intelligent Power Module (IPM) as a core driving IC, the IPM has the characteristic of controlling output power and output current, and the IPM + MCU scheme is used on the variable frequency range hood, so that the range hood can adaptively adjust the power, current or rotating speed of a motor under different smoke exhaust pipeline pressures, and the aim of smoothly exhausting oil smoke outdoors is fulfilled. However, the existing software control method of IPM + MCU scheme is basically linear, that is, the pressure in the smoke exhaust pipe increases by Δ Pa, the rotating speed of the motor increases by Δ V, and there is a linear slope K ═ Δ Pa/Δv. The scheme has the advantages that the motor can realize linear stepless regulation of the rotating speed, and the defects are that the motor per se has difference, and the maximum static pressure and the maximum air volume expressed by adopting the same K value for different motors in the same batch are also different (namely, when a flue is blocked, the static pressure (potential energy) output by the cigarette machine is inconsistent, and when the flue is not blocked, the air volume (kinetic energy) output by the cigarette machine is inconsistent), so that the consistency of the product performance of the cigarette machine cannot be ensured.
In addition, for the IPM + MCU scheme, the intrinsic adjustment coefficients inside the chips of each manufacturer are different, so that the relationship between the current value I output to the motor by different schemes and the actual rotation speed value V of the motor is different, I/V, and how to be compatible with the IPM + MCU schemes of multiple manufacturers becomes a difficult problem.
Disclosure of Invention
The invention provides a motor control method of a variable frequency range hood, aiming at solving the problem that the existing control methods of the variable frequency range hood are incompatible.
The invention is realized by adopting the following scheme:
a motor control method of a variable frequency range hood comprises the following steps:
after a frequency conversion plate of the frequency conversion range hood is replaced, whether the frequency conversion range hood can continuously maintain a calibration control method to control the frequency conversion range hood is judged; if yes, a calibration control method is maintained to control the variable-frequency range hood; if not, controlling the variable-frequency range hood by adopting a segmented control method;
wherein, the calibration control method comprises the following steps:
powering on a variable frequency range hood;
respectively defining N back pressures as N gears, and calibrating a calibration current I corresponding to each gear of the motornAnd calibrating the speed VnWherein N is a positive integer not less than 3;
calibrating current I of a certain gearnWhen the motor is given, the motor corresponds to the gearIs calibrated to rotate at a speed VnOperating at a target rotation speed;
detecting the actual rotating speed V of the motor after stable operation;
if the current actual rotating speed V is corresponding to the calibration rotating speed V of the gearnIf the two values are the same, the variable frequency range hood continues to control the motor to operate at the gear; otherwise, the variable frequency range hood controls the motor to operate at the gear after the gear is jumped;
wherein, the segment control method comprises the following steps:
dividing N back pressures of the fan into N stages according to the back pressures; n is more than 1 and less than N, and both N and N are positive integers;
and determining the current backpressure stage of the fan, and controlling the motor to operate by adopting a motor control method of the corresponding stage.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that whether the variable frequency cigarette machine can continuously maintain the calibration control method to control the variable frequency cigarette machine is judged, and the method specifically comprises the following steps:
judging whether the adjustment coefficient C of the replaced frequency conversion plate is within the adjustment coefficient threshold range; if yes, a calibration control method is maintained to control the variable-frequency range hood; if not, the variable-frequency range hood is controlled by adopting a segmented control method.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that the upper limit value of the threshold value range of the regulating coefficient is the regulating coefficient C of the variable frequency plate before replacement0And the adjustment coefficient increment threshold deltac; the lower limit value of the adjustment coefficient threshold value range is the adjustment coefficient C of the frequency conversion plate before replacement0And the adjustment coefficient increment threshold deltac.
The motor control method of the variable frequency range hood is further improved in that in the calibration control method, if the current actual rotating speed V is the same as the calibration rotating speed V corresponding to the gear, the motor control method of the variable frequency range hood is characterized in thatnIf the two values are the same, the variable frequency range hood continues to control the motor to operate at the gear; otherwise, the frequency conversion cigarette machine is with the gear control motor operation behind the shelves of jumping, specifically includes:
judging whether the current actual rotating speed V is in the gear pairCorresponding calibration rotating speed VnWithin the offset range of (d); if so, the variable frequency range hood continues to control the motor to operate at the gear; if not, the variable frequency range hood controls the motor to operate at the gear after the gear is jumped;
wherein, the lower limit value of the deviation range is the calibrated rotating speed V of the gearnDifference from a rotational speed threshold Δ V; the upper limit value of the deviation range is the calibrated rotating speed V of the gearnAnd the sum of the rotating speed threshold value delta V is more than or equal to 30rpm and less than or equal to 70 rpm.
The motor control method of the variable frequency range hood further changes the motor control method into a motor control method, wherein the variable frequency range hood controls the motor to run in a gear after gear skipping, and the method specifically comprises the following steps:
if the current actual rotating speed V of the motor is greater than the upper limit value of the offset range; the variable frequency range hood controls the motor to operate at a low gear;
if the current actual rotating speed V of the motor is less than the lower limit value of the offset range; the variable frequency range hood operates with the high gear control motor.
The motor control method of the variable frequency range hood further improves the motor control method, and the variable frequency range hood controls the motor to run at the gear, and specifically comprises the following steps:
target current I corresponding to the gearnGiven to the motor, the motor is set to a calibrated rotating speed V corresponding to the gearnThe operation is performed for the target rotation speed.
The motor control method of the variable frequency range hood further changes the motor control method into a motor control method, wherein the variable frequency range hood controls the motor to run in a gear after gear skipping, and the method specifically comprises the following steps:
target current I corresponding to the shifted gearnGiving the motor and the motor the calibrated rotating speed V corresponding to the jumped gearnThe operation is performed for the target rotation speed.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that a limited rotating speed V is preset for the motor0In which V is0Greater than the maximum rated current InAnd the corresponding upper threshold value of the motor rotating speed.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that in the sectional control method, the N back pressures of the fan are divided into N stages according to the back pressure, and the method specifically comprises the following steps:
the N back pressures of the fan are sequentially arranged according to the back pressure size, and the arranged N back pressures are divided into 3 stages, wherein the 3 stages are a high-pressure stage, a medium-pressure stage and a low-pressure stage respectively.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that the stage of the current backpressure value of the fan is determined, and the motor control method of the corresponding stage is adopted to control the motor to operate, and the method specifically comprises the following steps:
the current I of the motor is given when the variable frequency range hood is powered onxDetecting the first actual rotating speed V after the motor operates stably1；
Judging the first actual rotating speed V1Whether or not: v1＜V(bc)；V(bc)≤V1≤V(ab)；V1＞V(ab)；
Wherein, V(ab)Critical speed threshold, V, for high and medium voltage phases of a cigarette machine during power-up(bc)A critical speed threshold value of the low-pressure section and the medium-pressure section when the cigarette machine is powered on;
if V1＞V(ab)Controlling the motor to operate by adopting a motor control method of a high-voltage section;
if V(bc)≤V1≤V(ab)Controlling the motor to operate by adopting a motor control method of a medium-voltage section;
if V1＜V(bc)And controlling the motor to run by adopting a motor control method of a low-voltage section.
The motor control method of the variable frequency range hood is further improved in that the variable frequency range hood is electrified, and a first current threshold I of the motor is givenaDetecting the first actual rotating speed V after the motor operates stably1In which Ia＞ Ia’，Ia' is the current threshold of the motor at which the machine is at maximum static pressure.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that the motor control method of the high-voltage section is adopted to control the operation of the motor, and the method specifically comprises the following steps:
setting a first current threshold I of the electric machineaIn which Ia＞Ia’，Ia' is the current threshold of the motor at which the range hood is at maximum static pressure;
detecting in real time the motor at a first current threshold IaSecond actual rotational speed V during operation2；
Judging the second actual rotating speed V2Whether or not: v2< speed _ ab; the speed _ ab is a critical speed threshold value of a high-pressure section and a medium-pressure section when the cigarette machine normally works;
if so, adopting a motor control method of a medium-voltage section to control the motor; if not, continuously maintaining the output torque T of the motor unchanged, and continuously setting the first current threshold I of the motora。
The motor control method of the variable frequency range hood of the invention is further improved in that when the motor control method of the high-voltage section is adopted to control the motor to run, the first limited rotating speed V of the motor in the high-voltage section is givena', wherein, Va’＞Va＞Vmax1，VaIs a first current threshold IaCorresponding upper threshold value of the rotation speed of the motor, Vmax1The rotating speed threshold value of the motor when the smoke machine is at the maximum static pressure is shown.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that the motor is controlled by adopting a motor control method of a medium-voltage section, and the method comprises the following steps:
setting a second current threshold I of the motorb；
Detecting the second current threshold I of the motor in real timebThird actual rotational speed V during operation3Detecting the second actual power P of the motor in real timeb；
Judging the third actual rotating speed V3Whether or not: v3< speed _ bc; wherein speed _ bc is a critical speed threshold value of a low-pressure section and a medium-pressure section when the cigarette machine normally works; if so, controlling the motor by adopting a motor control method of a low-voltage section; if not, the motor control method for maintaining the medium-voltage section controls the motorA machine;
determining the second actual power PbWhether or not to decrease to Pb', wherein PbThe critical power threshold value of the high-pressure section and the medium-pressure section when the smoke machine normally works; if so, controlling the motor by adopting a motor control method of the high-voltage section; if not, the motor control method of the medium-voltage section is maintained to control the motor.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that the motor is controlled by adopting a motor control method of a medium-voltage section, and the method further comprises the following steps:
judging the third actual rotating speed V3Whether or not: v3≥VNoise (F)Wherein V isNoise (F)＜Vb，VNoise (F)Is a predetermined rotational speed threshold value, V, of a noise point of the motorbIs a second current threshold IbThe upper limit threshold value of the rotating speed of the corresponding motor; if not, continuously maintaining the output torque T of the motor unchanged; then judging the third actual rotating speed V3Whether or not: v3< speed _ bc; if yes, judging the second actual power PbWhether or not to decrease to Pb’。
The motor control method of the variable frequency cigarette machine of the invention is further improved in that the motor control method adopting the low-voltage section is adopted to control the motor, and the method comprises the following steps:
setting a third current threshold I of the motorcWherein, Ic＞Ic’，IcThe current threshold value of the motor when the range hood is in the maximum air volume state is set;
at a third defined speed Vc' rotation, wherein Vmax2≤Vc’＜Vc，VcIs a third current threshold IcThe upper limit threshold value of the rotating speed of the corresponding motor; vmax2The rotating speed threshold of the motor when the smoke machine reaches the maximum air quantity;
detecting the third actual power P of the motor in real timec；
Judging the third actual power PcWhether or not: pc＜Pc'; wherein P iscFor low-pressure and medium-pressure sections of cigarette-making machines in normal operationA critical power threshold; if so, adopting a motor control method of a medium-voltage section to control the motor; if not, the motor control method of the low-voltage section is maintained to control the motor.
The motor control method of the variable frequency cigarette machine is further improved in that N is 16, the 1 st backpressure represents the backpressure when the flue is in a full-blocked state, and the 16 th backpressure represents the backpressure when the flue is in a full-open state.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that 16 back pressures are arranged in sequence according to the back pressure, wherein the 1 st back pressure to the 4 th back pressure are high-pressure sections; the 5 th back pressure to the 12 th back pressure are medium-pressure sections; the 13 th back pressure to the 16 th back pressure are low-pressure sections.
The motor control method of the variable frequency cigarette machine of the invention is further improved in that the back pressure of the high-pressure section is more than 600 Pa; the back pressure of the medium-pressure section is 150 Pa-600 Pa; the back pressure of the low-pressure section is less than 150 Pa.
The invention has the beneficial effects that:
after the frequency conversion plate of the frequency conversion range hood is replaced, whether the frequency conversion range hood can continue to maintain a calibration control method or not needs to be judged to control the frequency conversion range hood; if yes, continuously maintaining and calibrating the control method to control the variable-frequency range hood; if not, the variable-frequency range hood is controlled by adopting a segmented control method. And because the sectional control method is the calibration current I calibrated in the calibration control methodnAnd calibrating the speed VnOn the premise of keeping the communication parameters between the variable frequency range hood and the variable frequency plates unchanged, the invention can realize the purpose that one variable frequency range hood can correspond to a plurality of variable frequency plates, and effectively solves the problem that the existing control method of the variable frequency range hood cannot be compatible with the variable frequency plates of different companies. For the complete machine of the frequency conversion cigarette machine, the frequency conversion plate is only required to be replaced in the embodiment, other parts do not need to be additionally replaced, for example, the electric control plate is replaced, the instant use is realized, and the trouble of newly opening materials is reduced.
Drawings
FIG. 1 is a flow chart of a motor control method of a variable frequency range hood according to an embodiment of the present invention;
FIG. 2 is a flow chart of a calibration control method in a motor control method of a variable frequency range hood according to an embodiment of the present invention;
FIG. 3 is a flow chart of a segment control method in a motor control method of a variable frequency range hood according to an embodiment of the present invention;
FIG. 4 is another flow chart of a calibration control method in a motor control method of a variable frequency range hood according to an embodiment of the present invention;
FIG. 5 is another flow chart of a segment control method in a motor control method of a variable frequency range hood according to an embodiment of the present invention;
FIG. 6 is a relationship between the output of three frequency conversion boards to the motor and the current value I and the actual rotating speed value V of the motor, wherein the slope represents the adjustment coefficient of each frequency conversion board.
FIG. 7 is a table showing the correspondence between the gears, the calibration currents and the calibration rotational speeds in the motor control method for the variable frequency range hood according to the embodiment of the present invention;
FIG. 8 is a graph of a portion of the performance of a variable frequency range hood when operated with the calibration parameters of FIG. 7; curve B is a relationship graph of wind pressure and wind volume, wherein the abscissa represents the wind volume in m3Min; the ordinate represents the wind pressure, and the unit is Pa; curve a is a curve automatically generated by the test system.
Fig. 9 is a variation trend chart of the motor speed and the motor power when the range hood normally works in the motor control method of the variable frequency range hood according to the embodiment of the present invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The meaning of "plurality" is two or more unless specifically limited otherwise.
As shown in fig. 1, the present embodiment provides a motor control method for a variable frequency range hood, which includes the following steps:
s1, replacing a frequency conversion plate of the frequency conversion range hood;
s2, judging whether the variable frequency range hood can continuously maintain a calibration control method to control the variable frequency range hood; if yes, go to S3; if not, go to S4;
s3, controlling the variable-frequency range hood by maintaining a calibration control method;
and S4, controlling the variable-frequency range hood by adopting a segmented control method.
The calibration control method in S3 includes the following steps, as shown in fig. 2:
s31, electrifying the variable-frequency range hood;
s32, respectively defining N back pressures as N gears, and calibrating a calibration current I corresponding to each gear of the motornAnd calibrating the speed VnWherein N is a positive integer not less than 3;
s33, calibrating current I of a certain gearnGiven the motor, the motor rotates at the corresponding calibrated speed V of the gearnOperating at a target rotation speed;
s34, detecting the actual rotating speed V after the motor operates stably;
s35, if the current actual rotating speed V is corresponding to the calibration rotating speed V of the gearnIf the two values are the same, the variable frequency range hood continues to control the motor to operate at the gear; otherwise, the variable frequency range hood controls the motor to operate at the gear after the gear is jumped;
the segmentation control method of S4 includes the following steps, as shown in fig. 3:
s41, dividing N back pressures of the fan into N stages according to the back pressures; n is more than 1 and less than N, and both N and N are positive integers;
and S42, determining the current backpressure stage of the fan, and controlling the motor to operate by adopting a motor control method of the corresponding stage.
After the frequency conversion plate of the frequency conversion range hood is replaced, whether the frequency conversion range hood can continue to maintain a calibration control method or not needs to be judged to control the frequency conversion range hood; if yes, continuously maintaining and calibrating the control method to control the variable-frequency range hood; if not, the variable-frequency range hood is controlled by adopting a segmented control method. And because the sectional control method is the calibration current I calibrated in the calibration control methodnAnd calibrating the speed VnFor the premise, the embodiment can realize the purpose that one frequency conversion cigarette machine can correspond to a plurality of frequency conversion boards on the premise of keeping the communication parameters between the frequency conversion cigarette machine and the frequency conversion boards unchanged, and effectively solves the problem that the existing frequency conversion cigarette machine control method cannot be compatible with the frequency conversion boards of different companies. For the complete machine of the frequency conversion cigarette machine, the frequency conversion plate is only required to be replaced in the embodiment, other parts do not need to be additionally replaced, for example, the electric control plate is replaced, the instant use is realized, and the trouble of newly opening materials is reduced.
In addition, the calibration control method of the embodiment can customize the calibration current I corresponding to each gearnAnd calibrating the speed VnEach gear corresponds to a back pressure state, so a designer can define different gears according to different types of variable frequency range hoods, and further the maximum static pressure and the maximum air volume of the variable frequency range hoods can reach the standard; in addition, in the embodiment, the current actual rotating speed V is judged to be the calibrated rotating speed V corresponding to the gearnAnd if the frequency conversion boards are the same, the control of the motor is further realized, so that the same motor frequency conversion board can be used for multiple types.
The sectional control method of the variable frequency range hood divides N back pressures of the fan into N stages; and then determining the current stage of the back pressure of the fan, and controlling the motor to operate by adopting a motor control method of the corresponding stage, wherein the motor control method is divided according to each stage, so that the accuracy of the motor control method is improved, and the consistency of the product performance of the variable frequency range hood is further improved.
Further, whether the variable frequency range hood can continue to maintain the calibration control method to control the variable frequency range hood is judged, and the method specifically comprises the following steps:
judging whether the adjustment coefficient C of the replaced frequency conversion plate is within the adjustment coefficient threshold range; if yes, a calibration control method is maintained to control the variable-frequency range hood; if not, the variable-frequency range hood is controlled by adopting a segmented control method.
Preferably, the upper limit value of the adjustment coefficient threshold value range is the adjustment coefficient C of the frequency conversion plate before replacement0And the sum of the incremental thresholds Δ C of the adjustment coefficients, i.e. C0C; the lower limit value of the threshold value range of the adjusting coefficient is the adjusting coefficient C of the frequency conversion plate before replacement0Difference from an adjustment coefficient increment threshold DeltaC, i.e. C0-△C。
When the frequency conversion board is determined, the adjustment coefficient C of the frequency conversion board is a determined value, as shown in fig. 6, it can be seen from fig. 6 that the adjustment coefficient C of the frequency conversion board is I/V, where I is the actual current value output by the frequency conversion board to the motor, and V is the actual rotation speed value of the motor.
Further, in the calibration control method, if the current actual rotating speed V is corresponding to the calibration rotating speed V corresponding to the gearnIf the two values are the same, the variable frequency range hood continues to control the motor to operate at the gear; otherwise, the frequency conversion cigarette machine is with the gear control motor operation behind the shelves of jumping, specifically includes:
judging whether the current actual rotating speed V is in the calibrated rotating speed V corresponding to the gearnWithin the offset range of (d); if so, the variable frequency range hood continues to control the motor to operate at the gear; if not, the variable frequency range hood controls the motor to operate at the gear after the gear is jumped;
wherein, the lower limit value of the deviation range is the calibrated rotating speed V of the gearnDifference from a rotational speed threshold Δ V; the upper limit value of the deviation range is the calibrated rotating speed V of the gearnAnd the sum of the rotating speed threshold value delta V is more than or equal to 30rpm and less than or equal to 70 rpm.
Preferably, Δ V satisfies: delta V is more than or equal to 40rpm and less than or equal to 60 rpm; preferably, Δ V is 50 rpm.
Specifically, the operation of the gear control motor after the frequency conversion cigarette machine with jumping specifically includes:
if the current actual rotating speed V of the motor is greater than the upper limit value of the offset range; the variable frequency range hood controls the motor to operate at a low gear;
if the current actual rotating speed V of the motor is less than the lower limit value of the offset range; the variable frequency range hood operates with the high gear control motor.
Specifically, the frequency conversion cigarette machine specifically includes with this fender position control motor operation:
target current I corresponding to the gearnGiven to the motor, the motor is set to a calibrated rotating speed V corresponding to the gearnThe operation is performed for the target rotation speed.
Specifically, the operation of the gear control motor after the frequency conversion cigarette machine with jumping specifically includes:
target current I corresponding to the shifted gearnGiving the motor and the motor the calibrated rotating speed V corresponding to the jumped gearnThe operation is performed for the target rotation speed.
Specifically, in the national standard test, the simulated flue is divided into 16 states in total from the fully closed state to the fully open state (hereinafter, referred to as back pressure), so in order to better meet the national standard test, in the present embodiment, N is 16, the 1 st back pressure represents the back pressure when the flue is in the fully closed state, and the 16 th back pressure represents the back pressure when the flue is in the fully open state.
In the embodiment, 16 back pressures are respectively defined as 16 gears, and a calibration current I corresponding to each gear of the motor is calibratednAnd calibrating the speed VnAs shown in fig. 7.
In the embodiment, after the operation according to the calibration parameters shown in fig. 7, the performance curve of the variable frequency range hood is shown in fig. 8, and it can be seen from the graph that the maximum air volume of the variable frequency range hood reaches 17.736m 3/min; along with the reduction of the air volume, the air pressure of the variable frequency range hood is gradually increased, finally, the maximum static pressure of the variable frequency range hood of the embodiment reaches 909.618Pa, and the middle section curve, namely the air volume is 9m3/min～14m3The curve of the min section is inwards concave to avoid the noise exceeding caused by overhigh rotating speed, and further the motor control method of the embodiment can avoid the noise.
Specifically, detect the actual rotational speed V after the motor steady operation, specifically include:
after the time threshold, the actual rotation speed V of the motor is detected, so as to ensure that the detected actual rotation speed is the actual rotation speed after the motor is stably rotated. The time threshold is a time preset in the control system in advance, and may be 500ms, for example.
In particular, a predetermined limit speed V is preset for the motor0In which V is0Greater than the maximum rated current InThe corresponding upper threshold value of the motor rotating speed aims to not limit the rotating speed of the motor.
In a specific embodiment, the calibration control method specifically includes the following steps, as shown in fig. 4:
powering on a variable frequency range hood;
setting 16 back pressures as 16 gears respectively, and calibrating a calibration current I corresponding to each gear of the motornAnd calibrating the speed Vn；
The calibration current I of the 9 th gear is adjusted9Giving the motor a corresponding calibration rotating speed V of 9 gears9Operating at a target rotation speed;
after a time threshold (500ms), detecting the actual rotating speed V of the motor;
judging whether the actual rotating speed V meets the following conditions: v > V9+. DELTA V, where DELTA V is 50 rpm;
if so, the variable frequency range hood controls the motor to operate in 8 gears;
if not, judging whether the actual rotating speed V meets the following conditions: v < V9-. DELTA.V, where. DELTA.V is 50 rpm; if so, the variable frequency range hood controls the motor to operate in 10 gears; if not, the frequency conversion range hood continues to control the motor to operate in the 9-gear position.
Further, in the sectional control method, the N back pressures of the fan are divided into N stages according to the back pressure, and the method specifically comprises the following steps:
the N back pressures of the fan are sequentially arranged according to the back pressure size, and the arranged N back pressures are divided into 3 stages, wherein the 3 stages are a high-pressure stage, a medium-pressure stage and a low-pressure stage respectively.
Wherein the back pressure of the high-pressure section is more than 600 Pa; the back pressure of the medium-pressure section is 150 Pa-600 Pa; the back pressure of the low-pressure section is less than 150 Pa.
In the national standard test, the simulated flue is divided into 16 states from the fully blocked state to the fully open state (hereinafter referred to as back pressure), so in order to better meet the national standard test, in the embodiment, N is 16, the 1 st back pressure represents the back pressure when the flue is in the fully blocked state, and the 16 th back pressure represents the back pressure when the flue is in the fully open state.
Preferably, 16 back pressures are arranged in sequence according to the back pressure, wherein the 1 st back pressure to the 4 th back pressure are high-pressure sections; the 5 th back pressure to the 12 th back pressure are medium-pressure sections; the 13 th back pressure to the 16 th back pressure are low-pressure sections.
Specifically, the stage where the current back pressure value of the fan is located is determined, and the motor control method in the corresponding stage is adopted to control the operation of the motor, which specifically includes the following steps, as shown in fig. 5 and 9:
s421, electrifying the variable frequency range hood, and setting the current I of the motorxDetecting the first actual rotating speed V after the motor operates stably1；
The cigarette machine is finished immediately when being electrified, and in the process, even if the motor starts to operate, because the electrifying time is short, the plugging state of the cigarette pipe is not changed in the electrifying process, and at the moment, the variable frequency cigarette machine needs to be judged in which stage according to preset parameters.
Preferably, after the variable frequency range hood is powered on, the first current threshold I of the motor can be setaDetecting a first actual rotation speed V when the motor is rotating stably1In which Ia＞Ia’，Ia' is the current threshold of the motor at which the machine is at maximum static pressure. The number of current parameters is reduced, which simplifies the control method of the present embodiment to some extent.
S422, judging the first actual rotating speed V1Whether or not: v1＜V(bc)；V(bc)≤V1≤V(ab)；V1＞ V(ab)；
Wherein, V(ab)Critical speed threshold, V, for high and medium voltage phases of a cigarette machine during power-up(bc)Critical speed of low and medium voltage sections when power is on for cigarette machineA threshold value; v(ab)And V(bc)The rotating speeds are preset in advance; wherein, V(ab)、V(bc)Are all parameters preset in the control system of the variable frequency range hood in advance.
If V1＞V(ab)Controlling the motor to operate by adopting a motor control method of a high-voltage section, namely S4221;
if V(bc)≤V1≤V(ab)If so, controlling the motor to operate by adopting a motor control method of a medium-voltage section, namely S4222;
if V1＜V(bc)And controlling the motor to operate by adopting a motor control method of a low-voltage section, namely S4223.
S4221, controlling the motor by adopting a motor control method of a high-voltage section, and specifically comprising the following steps:
setting a first current threshold I of the electric machineaIn which Ia＞Ia’，Ia' is the current threshold of the motor at which the range hood is at maximum static pressure;
detecting in real time the motor at a first current threshold IaSecond actual rotational speed V during operation2；
Judging the second actual rotating speed V2Whether or not: v2< speed _ ab; the speed _ ab is a critical speed threshold value of a high-pressure section and a medium-pressure section when the cigarette machine normally works; speed _ ab and V(ab)May be the same or different;
if so, adopting a motor control method of a medium-voltage section to control the motor; if not, continuously maintaining the output torque T of the motor unchanged, and continuously setting the first current threshold I of the motora。
In the high-voltage section, the motor outputs T (torque) based on the constant torque of the motor, and T (torque) is P (power)/V (rotating speed), so that the current I given to the motor is proportional to the torque T, and the torque T is proportional to the upper rotating speed limit of the motor, namely the current I given to the motor determines the upper rotating speed limit of the motor.
Since in the present embodiment the first current threshold I of the motor is givenaSo that the upper limit of the rotational speed of the motor is the first current threshold IaCorresponding motor speed thresholdValue Va。
And in the high-pressure section, when the motor is in the running process, if the smoke pipe is more and more seriously blocked in the smoke pipe, the power required by the motor is gradually increased, and in order to maintain the constant torque output of the motor, the rotating speed of the motor is gradually increased. However, as the rotation speed of the motor increases, the state of flue blockage gradually weakens, namely the flue blockage becomes smoother and smoother, the power required by the motor also decreases, the rotation speed of the motor gradually decreases in order to ensure constant torque output, and when the second actual rotation speed V of the motor is higher than the second actual rotation speed V2Satisfies the following conditions: v2If the speed is less than speed _ ab, the motor control method of the medium-pressure section is needed to control the motor, and the smoke exhaust purpose can be achieved.
Preferably, when the motor operation is controlled by adopting the motor control method of the high-voltage section, the first limited rotating speed V of the motor in the high-voltage section is givena', wherein, Va’＞Va＞Vmax1，VaFirst current threshold IaCorresponding upper threshold value of the rotation speed of the motor, Vmax1The rotating speed threshold value of the motor when the smoke machine is at the maximum static pressure is shown.
That is to say, the rotating speed of the motor is not limited, and when the smoke tube is completely blocked, namely the back pressure is maximum, the rotating speed of the motor reaches the maximum value, so that the requirement of the maximum static pressure is ensured.
S4222, controlling the motor by adopting a motor control method of a medium-voltage section, and specifically comprising the following steps:
setting a second current threshold I of the motorb；
Detecting the second current threshold I of the motor in real timebThird actual rotational speed V during operation3Detecting the second actual power P of the motor in real timeb；
Judging the third actual rotating speed V3Whether or not: v3≥VNoise (F)Wherein V isNoise (F)＜Vb，VNoise (F)Is a predetermined rotational speed threshold value, V, of a noise point of the motorbIs a second current threshold IbThe upper limit threshold value of the rotating speed of the corresponding motor;
if not, the output torque of the motor is continuously maintainedThe moment T is unchanged; then judging the third actual rotating speed V3Whether or not: v3< speed _ bc; wherein speed _ bc is a critical speed threshold value of a low-pressure section and a medium-pressure section when the cigarette machine normally works; if so, controlling the motor by adopting a motor control method of a low-voltage section; if not, the motor control method of the medium-voltage section is maintained to control the motor;
if yes, judging the second actual power PbWhether or not to decrease to Pb', wherein PbThe critical power threshold value of the high-pressure section and the medium-pressure section when the smoke machine normally works; if so, controlling the motor by adopting a motor control method of the high-voltage section; if not, the motor control method of the medium-voltage section is maintained to control the motor.
When the motor is operated in a control method of a medium-voltage section, a second current threshold I of the motor is givenbLater, because the rotating speed of the motor at the moment is close to speed _ ab, namely the third actual rotating speed V of the motor at the moment3Is at its maximum, so the second actual power P of the motor at this momentbIs also at a maximum.
And along with the operation of the motor, the blocking condition of the flue is more serious, the rotating speed of the motor is gradually reduced, and in order to ensure constant torque output, the second actual power P isbWill also gradually decrease when the second actual power PbIs reduced to PbWhen the motor is in a high-voltage section, a motor control method of the high-voltage section is needed to control the motor; when V is3If the speed _ bc is less than the speed _ bc, the motor needs to be controlled by adopting a motor control method of a low-voltage section.
Since the higher the rotation speed of the motor, the higher the noise of the motor, and in order to avoid the problem of higher noise in the middle-pressure section, the third actual rotation speed V is determined3Whether or not: v3< speed _ bc; and determining the second actual power PbWhether or not to decrease to PbWhen the third actual rotating speed V is judged first3Whether or not: v3≥VNoise (F)To adjust the third actual rotational speed V3Limiting the predetermined threshold value V of the rotational speed of the noise point of the electric machineNoise (F)The following.
S4223, controlling the motor by adopting a motor control method of a low-voltage section, and comprising the following steps:
setting a third current threshold I of the motorcWherein, Ic＞Ic’，IcThe current threshold value of the motor when the range hood is in the maximum air volume state is set;
at a third defined speed Vc' rotation, wherein Vmax2≤Vc’＜Vc，VcIs a third current threshold IcThe upper limit threshold value of the rotating speed of the corresponding motor; vmax2The rotating speed threshold of the motor when the smoke machine reaches the maximum air quantity;
detecting the third actual power P of the motor in real timec；
Judging the third actual power PcWhether or not: pc＜Pc'; wherein P isc' is a critical third power threshold of the low-pressure section and the medium-pressure section when the smoke machine normally works; if so, adopting a motor control method of a medium-voltage section to control the motor; if not, the motor control method of the low-voltage section is maintained to control the motor.
In the low-voltage section, the motor is higher than the rotating speed threshold value V of the motor when the smoke machine reaches the maximum air quantitymax2Third limit rotational speed Vc' turn, as the motor continues at a third defined speed VcThe smoke tube will be more and more blocked, the back pressure will be more and more increased, the back pressure difference of the smoke tube will be reduced, so the third actual power P of the motorcWill decrease when Pc＜PcIn the case of the 'time', a motor control method of a medium-voltage section is adopted to control the motor. In addition, the air volume is equal to the air speed area, and the air volume reaches the maximum when the back pressure is minimum (namely the ventilation area is maximum in the full-open state) at this stage, and the maximum air volume is constant because the motor rotating speed is constant, so that the maximum air volume is ensured to meet the requirement.
The embodiment adopts a three-section control method, and can avoid the operation noise of the motor from exceeding the standard on the premise of ensuring the consistency of the maximum static pressure and the maximum air quantity of the range hood.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the described parent features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (19)
1. A motor control method of a variable frequency range hood is characterized by comprising the following steps:
after a frequency conversion plate of the frequency conversion range hood is replaced, whether the frequency conversion range hood can continuously maintain a calibration control method to control the frequency conversion range hood is judged; if yes, a calibration control method is maintained to control the variable-frequency range hood; if not, controlling the variable-frequency range hood by adopting a segmented control method;
wherein, the calibration control method comprises the following steps:
powering on a variable frequency range hood; respectively defining N back pressures as N gears, and calibrating a calibration current I corresponding to each gear of the motornAnd calibrating the speed VnWherein N is a positive integer not less than 3;
calibrating current I of a certain gearnGiven the motor, the motor rotates at the corresponding calibrated speed V of the gearnOperating at a target rotation speed; detecting the actual rotating speed V of the motor after stable operation;
if the current actual rotating speed V is corresponding to the calibration rotating speed V of the gearnIf the two values are the same, the variable frequency range hood continues to control the motor to operate at the gear; otherwise, the variable frequency range hood controls the motor to operate at the gear after the gear is jumped;
wherein, the segment control method comprises the following steps:
dividing N back pressures of the fan into N stages according to the back pressures; n is more than 1 and less than N, and both N and N are positive integers;
and determining the current backpressure stage of the fan, and controlling the motor to operate by adopting a motor control method of the corresponding stage.
2. The motor control method of the variable frequency cigarette machine according to claim 1, wherein judging whether the variable frequency cigarette machine can continue to maintain the calibration control method to control the variable frequency cigarette machine comprises the following steps:
judging whether the adjustment coefficient C of the replaced frequency conversion plate is within the adjustment coefficient threshold range; if yes, a calibration control method is maintained to control the variable-frequency range hood; if not, the variable-frequency range hood is controlled by adopting a segmented control method.
3. The motor control method of a variable-frequency cigarette machine according to claim 2, characterized in that the upper limit value of the adjustment coefficient threshold range is the adjustment coefficient C of the variable-frequency plate before replacement0And the adjustment coefficient increment threshold deltac; the lower limit value of the adjustment coefficient threshold value range is the adjustment coefficient C of the frequency conversion plate before replacement0And the adjustment coefficient increment threshold deltac.
4. The motor control method of a variable frequency cigarette making machine according to claim 1, characterized in that in the calibration control method, if the current actual speed V is the calibration speed V corresponding to the gear positionnIf the two values are the same, the variable frequency range hood continues to control the motor to operate at the gear; otherwise, the frequency conversion cigarette machine is with the gear control motor operation behind the shelves of jumping, specifically includes:
judging whether the current actual rotating speed V is in the calibrated rotating speed V corresponding to the gearnWithin the offset range of (d); if so, the variable frequency range hood continues to control the motor to operate at the gear; if not, the variable frequency range hood controls the motor to operate at the gear after the gear is jumped;
wherein, the lower limit value of the deviation range is the calibrated rotating speed V of the gearnAnd a rotational speed thresholdThe difference between the values Δ V; the upper limit value of the deviation range is the calibrated rotating speed V of the gearnAnd the sum of the rotating speed threshold value delta V is more than or equal to 30rpm and less than or equal to 70 rpm.
5. The motor control method of the variable frequency cigarette making machine according to claim 4, wherein the variable frequency cigarette making machine controls the motor to operate in a gear after the gear skipping, and specifically comprises:
if the current actual rotating speed V of the motor is greater than the upper limit value of the offset range; the variable frequency range hood controls the motor to operate at a low gear;
if the current actual rotating speed V of the motor is less than the lower limit value of the offset range; the variable frequency range hood operates with the high gear control motor.
6. The motor control method of the variable frequency cigarette making machine according to claim 5, wherein the variable frequency cigarette making machine controls the motor to operate in the gear, and specifically comprises:
target current I corresponding to the gearnGiven to the motor, the motor is set to a calibrated rotating speed V corresponding to the gearnThe operation is performed for the target rotation speed.
7. The motor control method of the variable frequency cigarette making machine according to claim 5, wherein the variable frequency cigarette making machine controls the motor to operate in a gear after the gear skipping, and specifically comprises:
the target current I corresponding to the gear after the gear skippingnGiving the motor and the motor the calibrated rotating speed V corresponding to the jumped gearnThe operation is performed for the target rotation speed.
8. The method of controlling a motor of a variable frequency cigarette machine as in claim 1, wherein the predetermined defined speed V is preset for the motor0In which V is0Greater than the maximum rated current InAnd the corresponding upper threshold value of the motor rotating speed.
9. The motor control method of a variable frequency cigarette machine according to claim 1, wherein in the segment control method, the N back pressures of the fan are divided into N stages according to the back pressure, specifically comprising the steps of:
the N back pressures of the fan are sequentially arranged according to the back pressure size, and the arranged N back pressures are divided into 3 stages, wherein the 3 stages are a high-pressure stage, a medium-pressure stage and a low-pressure stage respectively.
10. The motor control method of the variable-frequency cigarette making machine according to claim 9, wherein the stage where the current back pressure value of the fan is located is determined, and the motor control method of the corresponding stage is adopted to control the motor to operate, and the method specifically comprises the following steps:
the current I of the motor is given when the variable frequency range hood is powered onxDetecting the first actual rotating speed V after the motor operates stably1；
Judging the first actual rotating speed V1Whether or not: v1＜V(bc)；V(bc)≤V1≤V(ab)；V1＞V(ab)；
Wherein, V(ab)Critical speed threshold, V, for high and medium voltage phases of a cigarette machine during power-up(bc)A critical speed threshold value of the low-pressure section and the medium-pressure section when the cigarette machine is powered on;
if V1＞V(ab)Controlling the motor to operate by adopting a motor control method of a high-voltage section;
if V(bc)≤V1≤V(ab)Controlling the motor to operate by adopting a motor control method of a medium-voltage section;
if V1＜V(bc)And controlling the motor to run by adopting a motor control method of a low-voltage section.
11. The method of claim 10, wherein the variable frequency cigarette maker is powered on and a first current threshold I is given for the motoraDetecting the first actual rotating speed V after the motor operates stably1In which Ia＞Ia’，Ia' is the current threshold of the motor at which the machine is at maximum static pressure.
12. The motor control method of a variable-frequency range hood according to claim 10, wherein the motor control method adopting the high-voltage section controls the operation of the motor, and specifically comprises the following steps:
setting a first current threshold I of the electric machineaIn which Ia＞Ia’，Ia' is the current threshold of the motor at which the range hood is at maximum static pressure;
detecting in real time the motor at a first current threshold IaSecond actual rotational speed V during operation2；
Judging the second actual rotating speed V2Whether or not: v2< speed _ ab; the speed _ ab is a critical speed threshold value of a high-pressure section and a medium-pressure section when the cigarette machine normally works;
if so, adopting a motor control method of a medium-voltage section to control the motor; if not, continuously maintaining the output torque T of the motor unchanged, and continuously setting the first current threshold I of the motora。
13. The motor control method for a variable-frequency range hood according to claim 12, wherein the first defined rotation speed V of the motor in the high-voltage section is given when the motor control method for the high-voltage section is adopted to control the operation of the motora', wherein, Va’＞Va＞Vmax1，VaIs a first current threshold IaCorresponding upper threshold value of the rotation speed of the motor, Vmax1The rotating speed threshold value of the motor when the smoke machine is at the maximum static pressure is shown.
14. The motor control method of a variable frequency cigarette machine according to claim 10, wherein the motor control method adopting the medium voltage section controls the motor, comprising the steps of:
setting a second current threshold I of the motorb；
Detecting the second current threshold I of the motor in real timebThird actual rotational speed V during operation3Detecting the second actual power P of the motor in real timeb；
Judging the third actual rotating speed V3Whether or not: v3< speed _ bc; wherein speed _ bc is a critical speed threshold value of a low-pressure section and a medium-pressure section when the cigarette machine normally works; if so, controlling the motor by adopting a motor control method of a low-voltage section; if not, the motor control method of the medium-voltage section is maintained to control the motor;
determining the second actual power PbWhether or not to decrease to Pb', wherein PbThe critical power threshold value of the high-pressure section and the medium-pressure section when the smoke machine normally works; if so, controlling the motor by adopting a motor control method of the high-voltage section; if not, the motor control method of the medium-voltage section is maintained to control the motor.
15. The motor control method of a variable frequency cigarette machine according to claim 14, wherein the motor control method employing the medium voltage section controls the motor, further comprising:
judging the third actual rotating speed V3Whether or not: v3≥VNoise (F)Wherein V isNoise (F)＜Vb，VNoise (F)Is a predetermined rotational speed threshold value, V, of a noise point of the motorbIs a second current threshold IbThe upper limit threshold value of the rotating speed of the corresponding motor; if not, continuously maintaining the output torque T of the motor unchanged; then judging the third actual rotating speed V3Whether or not: v3< speed _ bc; if yes, judging the second actual power PbWhether or not to decrease to Pb’。
16. The motor control method of a variable-frequency range hood according to claim 10, wherein the motor control method employing the low-voltage section controls the motor, comprising the steps of:
setting a third current threshold I of the motorcWherein, Ic＞Ic’，IcThe current threshold value of the motor when the range hood is in the maximum air volume state is set;
at a third defined speed Vc' rotation, wherein Vmax2≤Vc’＜Vc，VcIs a third current threshold IcThe upper limit threshold value of the rotating speed of the corresponding motor; vmax2The rotating speed threshold of the motor when the smoke machine reaches the maximum air quantity;
detecting the third actual power P of the motor in real timec；
Judging the third actual power PcWhether or not: pc＜Pc'; wherein P iscThe critical power threshold value of the low-pressure section and the medium-pressure section when the smoke machine normally works; if so, adopting a motor control method of a medium-voltage section to control the motor; if not, the motor control method of the low-voltage section is maintained to control the motor.
17. The motor control method of the variable-frequency cigarette machine according to any one of claims 1 to 16, wherein N-16, the 1 st back pressure represents the back pressure when the flue is in a fully blocked state, and the 16 th back pressure represents the back pressure when the flue is in a fully open state.
18. The motor control method of the variable frequency cigarette machine according to claim 17, characterized in that 16 back pressures are arranged in sequence according to the back pressure, wherein the 1 st back pressure to the 4 th back pressure are high pressure sections; the 5 th back pressure to the 12 th back pressure are medium-pressure sections; the 13 th back pressure to the 16 th back pressure are low-pressure sections.
19. The motor control method of a variable frequency cigarette machine according to claim 18, wherein the back pressure of the high pressure section is greater than 600 Pa; the back pressure of the medium-pressure section is 150 Pa-600 Pa; the back pressure of the low-pressure section is less than 150 Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011123070.8A CN112377959B (en) | 2020-10-20 | 2020-10-20 | Motor control method of variable-frequency range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011123070.8A CN112377959B (en) | 2020-10-20 | 2020-10-20 | Motor control method of variable-frequency range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112377959A true CN112377959A (en) | 2021-02-19 |
| CN112377959B CN112377959B (en) | 2022-11-15 |
Family
ID=74580222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011123070.8A Active CN112377959B (en) | 2020-10-20 | 2020-10-20 | Motor control method of variable-frequency range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112377959B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234251A (en) * | 2021-12-17 | 2022-03-25 | 杭州老板电器股份有限公司 | Flue state identification method and device of range hood |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900364A (en) * | 2010-07-26 | 2010-12-01 | 江苏光芒厨卫太阳能科技有限公司 | DC frequency conversion range hood |
| US20110068723A1 (en) * | 2003-07-22 | 2011-03-24 | Maiocchi Sergio A | System For Operating DC Motors And Power Converters |
| US20120161674A1 (en) * | 2010-12-23 | 2012-06-28 | Hsiao-Ping Hung | Dc motor speed controller of a range hood |
| WO2013093716A1 (en) * | 2011-12-22 | 2013-06-27 | Koninklijke Philips Electronics N.V. | Calculating the ultrasonic intensity estimate using an incoherent sum of the ultrasonic pressure generated by multiple transducer elements |
| CN103216867A (en) * | 2013-04-25 | 2013-07-24 | 中山华帝燃具股份有限公司 | Range hood air volume and air pressure compensation system based on variable frequency motor and control method thereof |
| CN103697519A (en) * | 2013-12-27 | 2014-04-02 | 苏州市牛勿耳关电器科技有限公司 | Automatic speed adjusting range hood |
| US20150349681A1 (en) * | 2014-05-30 | 2015-12-03 | Delta Electronics (Shanghai) Co., Ltd. | Variable frequency speed control system and method of the same |
| CN107781878A (en) * | 2017-11-06 | 2018-03-09 | 广东美的厨房电器制造有限公司 | The air quantity adjusting method of cigarette machine and cigarette machine |
| CN109631120A (en) * | 2019-01-09 | 2019-04-16 | 杭州老板电器股份有限公司 | Concentrate frequency conversion smoke evacuation control method and device |
| CN109855144A (en) * | 2019-04-02 | 2019-06-07 | 浙江帅康电气股份有限公司 | A kind of control method of frequency conversion range hood, control system and frequency conversion range hood |
-
2020
- 2020-10-20 CN CN202011123070.8A patent/CN112377959B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110068723A1 (en) * | 2003-07-22 | 2011-03-24 | Maiocchi Sergio A | System For Operating DC Motors And Power Converters |
| CN101900364A (en) * | 2010-07-26 | 2010-12-01 | 江苏光芒厨卫太阳能科技有限公司 | DC frequency conversion range hood |
| US20120161674A1 (en) * | 2010-12-23 | 2012-06-28 | Hsiao-Ping Hung | Dc motor speed controller of a range hood |
| WO2013093716A1 (en) * | 2011-12-22 | 2013-06-27 | Koninklijke Philips Electronics N.V. | Calculating the ultrasonic intensity estimate using an incoherent sum of the ultrasonic pressure generated by multiple transducer elements |
| CN103216867A (en) * | 2013-04-25 | 2013-07-24 | 中山华帝燃具股份有限公司 | Range hood air volume and air pressure compensation system based on variable frequency motor and control method thereof |
| CN103697519A (en) * | 2013-12-27 | 2014-04-02 | 苏州市牛勿耳关电器科技有限公司 | Automatic speed adjusting range hood |
| US20150349681A1 (en) * | 2014-05-30 | 2015-12-03 | Delta Electronics (Shanghai) Co., Ltd. | Variable frequency speed control system and method of the same |
| CN107781878A (en) * | 2017-11-06 | 2018-03-09 | 广东美的厨房电器制造有限公司 | The air quantity adjusting method of cigarette machine and cigarette machine |
| CN109631120A (en) * | 2019-01-09 | 2019-04-16 | 杭州老板电器股份有限公司 | Concentrate frequency conversion smoke evacuation control method and device |
| CN109855144A (en) * | 2019-04-02 | 2019-06-07 | 浙江帅康电气股份有限公司 | A kind of control method of frequency conversion range hood, control system and frequency conversion range hood |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234251A (en) * | 2021-12-17 | 2022-03-25 | 杭州老板电器股份有限公司 | Flue state identification method and device of range hood |
| CN114234251B (en) * | 2021-12-17 | 2023-07-25 | 杭州老板电器股份有限公司 | Flue state identification method and device of smoke machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112377959B (en) | 2022-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112377959B (en) | Motor control method of variable-frequency range hood | |
| US10161317B2 (en) | Gas-turbine control device, gas turbine, and gas-turbine control method | |
| EP2808493B1 (en) | Two-shaft gas turbine | |
| US20070245708A1 (en) | High cycle fatigue management for gas turbine engines | |
| CA3039580A1 (en) | Wind turbine and method for operating a wind turbine | |
| CN103423837A (en) | Free static pressure air pipe type air conditioner | |
| KR20130087526A (en) | A solution for controlling a turbo compressor | |
| CN103727050A (en) | Constant-flow blower fan and control method thereof | |
| CN107859645B (en) | Blower control method, system and air-conditioning | |
| JP2012500362A5 (en) | ||
| CN109245662B (en) | VF control method of variable pitch motor | |
| CN112087167B (en) | Motor control method of variable-frequency range hood and variable-frequency range hood | |
| CN112922895A (en) | Centrifugal compressor with inlet guide vane adjusting structure and adjusting method thereof | |
| CN112081771B (en) | Motor control method of variable-frequency range hood and variable-frequency range hood | |
| KR20190116411A (en) | Improvement on stabilization of hydraulic machines with S-zone characteristics | |
| CN112611095B (en) | Control method and control device for indoor direct current fan in variable frequency air conditioner | |
| CN110332119B (en) | Automatic control system and method for starting process of screw type refrigeration compressor | |
| EP2875580A2 (en) | System and method of dynamic regulation of real power to a load | |
| CN111425238A (en) | Coal mine main ventilator switching method | |
| CN112761998A (en) | Control method for enabling compressor to operate at optimal working point based on machine self-learning | |
| CN112113318B (en) | Control method for variable DQ compensation current proportional gain coefficient | |
| CN211606325U (en) | Anti-interference speed-regulating chip for shunt type ac motor | |
| CN114243728B (en) | Power grid small signal analysis method of Type-II double-fed variable speed pumping and accumulating unit | |
| CN109779850A (en) | A kind of the tip-speed ratio control system and method for wind mill wind wheel test | |
| CN108631662A (en) | A kind of method, apparatus and system of switched reluctance machines braking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |