CN111998414A - Control method of range hood - Google Patents
Control method of range hood Download PDFInfo
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- CN111998414A CN111998414A CN202010935004.4A CN202010935004A CN111998414A CN 111998414 A CN111998414 A CN 111998414A CN 202010935004 A CN202010935004 A CN 202010935004A CN 111998414 A CN111998414 A CN 111998414A
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- rotating speed
- motor
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- range hood
- full pressure
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000779 smoke Substances 0.000 claims abstract description 5
- 235000019504 cigarettes Nutrition 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- 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 provides a control method of a range hood, which comprises the following steps: step S101, starting a smoke machine, and gradually increasing the rotating speed of a motor; step S102, detecting whether the real-time rotating speed of the motor reaches a calibrated rotating speed; if yes, go to step S103; if not, returning to the step S102; step S103, detecting real-time current; step S104, judging whether the real-time current is in a current range of a preset low full-voltage section; if yes, go to step S105; if not, the step S106 is executed; step S105, controlling the motor to operate at a calibrated rotating speed; and step S106, increasing the rotation speed of the motor. When the range hood is started, the rotating speed of the motor is gradually increased, when the rotating speed of the motor reaches the calibrated rotating speed and the current is in the current range of the preset low full-pressure section, the motor is controlled to operate at the calibrated rotating speed, the large air volume is ensured at low resistance, the whole exhaust air volume is not influenced at the low resistance section, and the use requirements of users are met.
Description
Technical Field
The invention relates to the technical field of range hoods, in particular to a control method of a range hood.
Background
In the prior art, a scheme of constant torque or constant rotating speed is generally adopted to control the rotating speed of the range hood, or a wind pressure detection module is adopted to adjust the rotating speed in real time according to wind pressure; when the constant torque or the constant rotating speed is adopted for control, when performance parameters among motor or controller part batches fluctuate, the maximum air quantity or the maximum full pressure is also greatly influenced, so that the market is unqualified in spot check; and the increase of the wind pressure module increases the cost of the whole machine, and influences the competitiveness of the whole machine.
The control method of the range hood is provided, a wind pressure detection module is not needed, after the control method is used, the range hood ensures large full pressure under a high-resistance working condition, simultaneously ensures large air volume under low resistance, and meets the requirements of air discharge and reduces noise under common resistance (0-300 Pa); when performance parameters of motor or controller parts in batches fluctuate, the whole machine exhaust air volume is not affected in a low-resistance section, and design requirements are met; satisfy the user to the different demands of amount of wind or noise, promote user experience.
Disclosure of Invention
The invention solves one of the problems in the prior art to a certain extent, and therefore the invention aims to provide a control method of a range hood, which can ensure large air volume at low resistance.
The above purpose is realized by the following technical scheme:
a control method of a range hood comprises the following steps:
step S101, starting a smoke machine, and gradually increasing the rotating speed of a motor;
step S102, detecting whether the real-time rotating speed of the motor reaches a calibrated rotating speed;
if yes, go to step S103; if not, returning to the step S102;
step S103, detecting real-time current;
step S104, judging whether the real-time current is in a current range of a preset low full-voltage section;
if yes, go to step S105; if not, the step S106 is executed;
step S105, controlling the motor to operate at a calibrated rotating speed;
and step S106, increasing the rotation speed of the motor.
As a further improvement of the present invention, step S105, after controlling the motor to operate at the calibrated speed, further includes the following steps: step S107, judging whether the real-time current is still in the current range of the preset low full-voltage section; if yes, returning to the step S105; if not, the step S108 is executed; step S108, increasing the rotating speed of the motor to the current rotating speed, and acquiring the current of the motor at the current rotating speed; step S109, acquiring a first calibration current corresponding to the current rotating speed of the motor, and judging whether the current is within a positive and negative preset range of the first calibration current; if yes, go to step S110; if not, returning to the step S108; and step S110, controlling the rotating speed of the motor to be the current rotating speed.
As a further improvement of the present invention, step S110, after controlling the rotation speed of the motor to be the current rotation speed, further includes the following steps: step S111, detecting whether the current is increased or decreased to exceed the positive and negative preset range of the first calibration current; if yes, go to step S112; if not, returning to the step S110; step S112, adjusting the rotating speed of the motor, and obtaining the working current after the rotating speed of the motor is adjusted; step S113, acquiring a corresponding second calibration current after the motor rotating speed is adjusted, and judging whether the working current is within a positive and negative preset range of the second calibration current; if so, controlling the rotating speed of the motor to be the adjusted rotating speed; if not, the process returns to step S112.
As a further improvement of the present invention, in step S111, if the detected real-time current value decreases to exceed the positive and negative preset ranges of the first calibration current, step S112 and step S113 specifically are: step S112, increasing the rotating speed of the motor, and obtaining the working current after the rotating speed of the motor is increased; step S113, acquiring a corresponding third calibration current after the rotating speed of the motor is increased, and judging whether the first working current is within a positive and negative preset range of the third calibration current; if so, controlling the rotating speed of the motor to be the increased rotating speed; if not, the process returns to step S112.
As a further improvement of the present invention, in step S111, if the detected real-time current value increases to exceed the positive and negative preset ranges of the first calibration current, step S112 and step S113 specifically are: step S112, reducing the rotating speed of the motor, and obtaining the working current after the rotating speed of the motor is reduced; step S113, acquiring a corresponding fourth calibration current after the rotating speed of the motor is reduced, and judging whether the working current is within a positive and negative preset range of the fourth calibration current; if so, controlling the rotating speed of the motor to be the reduced rotating speed; if not, the process returns to step S112.
As a further improvement of the invention, in step S101, the range hood is started, and before the rotating speed of the motor is gradually increased, the method also comprises the following steps: and acquiring air quantities corresponding to different full-pressure values of the range hood, and acquiring the motor rotating speed and the required calibration current meeting the corresponding air quantities.
As a further improvement of the invention, the method for testing the air volume corresponding to different full pressure values of the range hood and acquiring the motor speed and the motor current under the corresponding air volume comprises the following steps: dividing the space between the zero full pressure value and the maximum full pressure value into a plurality of full pressure points; according to the formula
Respectively inputting a plurality of full pressure points P0 divided by the cigarette machine into a formula to obtain air volume Q corresponding to each full pressure point P0, wherein P0 is the full pressure point of the cigarette machine, Q is the air volume, K is a fixed value, D is the hole plate diameter of the flue resistance of the cigarette machine, D is a correction parameter of the cigarette machine, and rho is the air density; and obtaining the motor rotating speed and the calibration current which meet the corresponding air quantity Q.
As a further improvement of the invention, the air quantity Q corresponding to each full pressure point and each full pressure point, and the motor rotating speed and the calibration current which meet the corresponding air quantity Q form table data to be written into the controller of the cigarette machine.
As a further improvement of the invention, the calibration rotating speed is the rotating speed of the motor which reaches the set maximum air quantity when the full pressure value of the range hood is zero.
As a further improvement of the invention, a preset low full pressure section is set between the full pressure value of zero and a preset full pressure value, wherein the preset full pressure value is 80-150 PA.
Compared with the prior art, the invention at least comprises the following beneficial effects:
1. the invention provides a control method of a range hood, when the range hood is started, the rotating speed of a motor is gradually increased, when the rotating speed of the motor reaches a calibrated rotating speed and the current is in a preset current range of a low full-pressure section, the motor is controlled to operate at the calibrated rotating speed, large air volume is ensured at low resistance, the whole exhaust air volume is not influenced at the low resistance section, and the use requirements of users are met.
Drawings
FIG. 1 is a flow chart of a control method of a range hood according to an embodiment;
fig. 2 is another flowchart of a control method of a range hood according to an embodiment.
Detailed Description
The present invention is illustrated by the following examples, but the present invention is not limited to these examples. Modifications to the embodiments of the invention or equivalent substitutions of parts of technical features without departing from the spirit of the invention are intended to be covered by the scope of the claims of the invention.
The first embodiment is as follows:
referring to fig. 1, a control method of a range hood is shown, which comprises the following steps:
step S101, starting a smoke machine, and gradually increasing the rotating speed of a motor;
step S102, detecting whether the real-time rotating speed of the motor reaches a calibrated rotating speed;
if yes, go to step S103; if not, returning to the step S102;
step S103, detecting real-time current;
step S104, judging whether the real-time current is in a current range of a preset low full-voltage section;
if yes, go to step S105; if not, the step S106 is executed;
step S105, controlling the motor to operate at a calibrated rotating speed;
and step S106, increasing the rotation speed of the motor.
In step S101, the range hood is started, and the following steps are included before the rotating speed of the motor is gradually increased: and step 100, acquiring air quantities corresponding to different full pressure values of the range hood, and acquiring the motor rotating speed and the required calibration current meeting the corresponding air quantities.
In step S102, the calibrated rotating speed is the rotating speed of the motor that reaches the set maximum air volume when the full pressure value of the range hood is zero.
In step S104, a preset low full pressure section is set between the full pressure value of zero and a preset full pressure value, where the preset full pressure value is 80-150 PA.
The invention provides a control method of a range hood, when the range hood is started, the rotating speed of a motor is gradually increased, when the rotating speed of the motor reaches a calibrated rotating speed and the current is in a preset current range of a low full-pressure section, the motor is controlled to operate at the calibrated rotating speed, large air volume is ensured at low resistance, the whole exhaust air volume is not influenced at the low resistance section, and the use requirements of users are met.
Preferably, in step 100, the method for testing the air volume corresponding to different total pressure values of the range hood and obtaining the motor speed and the motor current under the corresponding air volume comprises the following steps:
step S1001, dividing the space between the full pressure value of zero and the maximum full pressure value into a plurality of full pressure points;
step S1002, according to the formula
Respectively inputting a plurality of full pressure points P0 divided by the cigarette machine into a formula to obtain air volume Q corresponding to each full pressure point P0, wherein P0 is the full pressure point of the cigarette machine, Q is the air volume, K is a fixed value, D is the hole plate diameter of the flue resistance of the cigarette machine, D is a correction parameter of the cigarette machine, and rho is the air density;
and step S1003, obtaining the motor rotating speed n and the calibration current I which meet the corresponding air quantity Q.
And step S1004, writing the table data formed by each full pressure point, the air quantity Q corresponding to each full pressure point, the motor rotating speed meeting the corresponding air quantity Q and the calibration current into the smoke machine controller.
For example, a certain range hood requires that the maximum air volume (0Pa full pressure) reaches 19m3Min, maximum total pressure 850 Pa.
Step S1001, dividing 0-850Pa into 16 full pressure points, wherein the first full pressure point and the sixteenth full pressure point are respectively as follows: 36.71, 48.79, 64.39, 79.43, 100, 140, 195, 260, 340, 400, 480, 550, 650, 735, 800, 850.
Step S1002, respectively inputting 16 full pressure points P0 into a formula according to the formula, and obtaining the air volume Q corresponding to each full pressure point P0; and step S1003, obtaining the motor rotating speed n and the calibration current I which meet the corresponding air quantity Q.
According to the test, the air quantity is 19m at 0Pa3At/min, the required speed N0 is 780 rpm, so in this example the nominal speed is 780 rpm. In this example, the preset full pressure value is set to 100Pa, and 0-100Pa is the preset low full pressure section. The following data are obtained:
| numbering | Full pressure P0 | Air volume value Q | Speed n | Current I |
| 1 | 850.00 | 0.00 | 1800 | 2.4 |
| 2 | 800.00 | 2.00 | 1750 | 2.26 |
| 3 | 735.00 | 3.70 | 1720 | 2.15 |
| 4 | 650.00 | 5.50 | 1700 | 2.02 |
| 5 | 550.00 | 7.30 | 1540 | 1.98 |
| 6 | 480.00 | 9.40 | 1300 | 1.8 |
| 7 | 400.00 | 11.50 | 1200 | 1.7 |
| 8 | 340.00 | 13.40 | 1100 | 1.62 |
| 9 | 260.00 | 14.50 | 1000 | 1.5 |
| 10 | 195.00 | 15.40 | 920 | 1.4 |
| 11 | 140.00 | 15.80 | 850 | 1.32 |
| 12 | 100 | 16.30 | 780 | 1.25 |
| 13 | 79.43 | 16.44 | 780 | 1.3 |
| 14 | 64.39 | 17.23 | 780 | 1.38 |
| 15 | 48.79 | 17.35 | 780 | 1.45 |
| 16 | 36.71 | 17.32 | 780 | 1.52 |
Step S1004 writes the data in the table into the controller.
Step S101, after a user starts the cigarette making machine, the rotating speed of the motor is gradually increased from 0.
Step S102, detecting whether the real-time rotating speed of the motor reaches 780 rpm, when the real-time rotating speed of the motor reaches 780 rpm, entering step S103 to detect real-time current, and step S104 judging whether the real-time current is in the current range of the preset low full-voltage section. That is, it is determined whether the real-time current falls within the current range in the section 12-16 in the table data, that is, whether the real-time current is 1.25 or more and 1.52 or less. If the full voltage is just in the range of 0-100Pa at the moment, the real-time current is confirmed to be in accordance with a certain calibrated current in the full voltage points of the 12 th-16 th sections because the rotating speed n and the full voltage P0 are matched with the data of the table.
And if the real-time current is within the current range of the preset low full-voltage section, the step S105 is carried out, and the motor is controlled to operate at the calibrated rotating speed. And at the moment, the total pressure of the public flue of the user is judged to be in the range of 0-100Pa, the range hood is in a preset low total pressure section, and the range hood enters a constant rotating speed mode. The rotating speed of the motor is fixed to 780 revolutions per minute; and continuously refreshing the current of the motor, if the current is continuously more than or equal to 1.25 and less than or equal to 1.52 in I1, determining that the current is always between 0 and 100Pa in the preset low full-pressure section, and controlling the motor to continuously operate according to the constant rotating speed of 780 rpm.
Example two:
the difference between this embodiment and the first embodiment is that, referring to fig. 2, step S105, after controlling the motor to operate at the calibrated speed, the method further includes the following steps:
step S107, judging whether the real-time current is still in the current range of the preset low full-voltage section;
if yes, returning to the step S105; if not, the step S108 is executed;
step S108, increasing the rotating speed of the motor to the current rotating speed, and acquiring the current of the motor at the current rotating speed;
step S109, acquiring a first calibration current corresponding to the current rotating speed of the motor, and judging whether the current is within a positive and negative preset range of the first calibration current;
if yes, go to step S110; if not, returning to the step S108;
and step S110, controlling the rotating speed of the motor to be the current rotating speed.
The invention provides a control method of a range hood, which ensures high full pressure under the high-resistance working condition.
Continuing with the example of the first embodiment, step S107 determines whether the real-time current is still within the current range of the preset low full-voltage segment; and if the real-time current value is in the current range of the preset low full-voltage section, the constant motor rotates at 780 rpm and continues to operate. If the real-time current value at a certain moment is not within the range of 1.2-1.52, the situation that the full voltage already exits the preset low full voltage section at the moment is judged, and the rotating speed of the motor exits the constant rotating speed mode.
And gradually increasing the rotation speed of the motor according to the data in the table, and if the total pressure of the common flue is 400Pa at the moment, increasing the rotation speed n 12-780 of the motor to the current rotation speed of the motor when n 11-850 revolutions/min in step S108, and acquiring the current of the motor at the current rotation speed. Step S109, or obtaining a first calibration current corresponding to the current rotation speed of the motor of 850 rpm, wherein the first calibration current is 1.32, and the current is not within the positive and negative preset range of the first calibration current; the motor speed continues to increase.
When the rotating speed of the motor is increased to n 10-920 rpm, n 9-1000 rpm and n 8-1100 rpm, the current is respectively compared with the calibration current at the current rotating speed of the motor, and the real-time current is not in the positive and negative preset range of the calibration current at the current rotating speed of the motor. When the motor continues to accelerate to the speed n7 which is 1200 r/min, the current of the motor at the current rotating speed is 1.68, the corresponding first calibration current of the motor at the speed 1200 r/min is 1.7, because the full pressure P0 and the rotating speed n1 are both consistent, and the current is in the positive and negative preset range of the first calibration current, at the moment, the controller judges that the current full pressure P0 of the user common flue is 400Pa, and the controller controls the rotating speed of the motor to operate at the speed n7 which is 1200 r/min.
Meanwhile, the refreshed current is continuously compared with the first calibration current 1.7, if the current is reduced, the total pressure P0 of the public flue is increased, the rotating speed of the motor is increased, and larger air output is maintained; when the current is increased, the total pressure P0 of the common flue is reduced, the rotating speed of the motor is reduced, and the air output is reduced.
Step S110, after controlling the rotating speed of the motor to be the current rotating speed, the method also comprises the following steps:
step S111, detecting whether the current is increased or decreased to exceed the positive and negative preset range of the first calibration current;
if yes, go to step S112; if not, returning to the step S110;
step S112, adjusting the rotating speed of the motor, and obtaining the working current after the rotating speed of the motor is adjusted;
step S113, acquiring a corresponding second calibration current after the motor rotating speed is adjusted, and judging whether the working current is within a positive and negative preset range of the second calibration current;
if so, controlling the rotating speed of the motor to be the adjusted rotating speed; if not, the process returns to step S112.
Preferably, in step S111, if the detected real-time current value decreases to exceed the positive and negative preset ranges of the first calibration current, step S112 and step S113 specifically include:
step S112, increasing the rotating speed of the motor, and obtaining the working current after the rotating speed of the motor is increased;
step S113, acquiring a corresponding third calibration current after the rotating speed of the motor is increased, and judging whether the first working current is within a positive and negative preset range of the third calibration current;
if so, controlling the rotating speed of the motor to be the increased rotating speed; if not, the process returns to step S112.
Preferably, in step S111, the detected real-time current value is increased to exceed the positive and negative preset ranges of the first calibration current, and step S112 and step S113 specifically include:
step S112, reducing the rotating speed of the motor, and obtaining the working current after the rotating speed of the motor is reduced;
step S113, acquiring a corresponding fourth calibration current after the rotating speed of the motor is reduced, and judging whether the working current is within a positive and negative preset range of the fourth calibration current;
if so, controlling the rotating speed of the motor to be the reduced rotating speed; if not, the process returns to step S112.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
Claims (10)
1. A control method of a range hood is characterized by comprising the following steps:
step S101, starting a smoke machine, and gradually increasing the rotating speed of a motor;
step S102, detecting whether the real-time rotating speed of the motor reaches a calibrated rotating speed;
if yes, go to step S103; if not, returning to the step S102;
step S103, detecting real-time current;
step S104, judging whether the real-time current is in a current range of a preset low full-voltage section;
if yes, go to step S105; if not, the step S106 is executed;
step S105, controlling the motor to operate at a calibrated rotating speed;
and step S106, increasing the rotation speed of the motor.
2. The control method of a range hood according to claim 1, wherein the step S105, after controlling the motor to operate at the calibrated speed, further comprises the steps of:
step S107, judging whether the real-time current is still in the current range of the preset low full-voltage section;
if yes, returning to the step S105; if not, the step S108 is executed;
step S108, increasing the rotating speed of the motor to the current rotating speed, and acquiring the current of the motor at the current rotating speed;
step S109, acquiring a first calibration current corresponding to the current rotating speed of the motor, and judging whether the current is within a positive and negative preset range of the first calibration current;
if yes, go to step S110; if not, returning to the step S108;
and step S110, controlling the rotating speed of the motor to be the current rotating speed.
3. The control method of the range hood according to claim 2, wherein the step S110 further comprises the following steps after controlling the rotation speed of the motor to be the current rotation speed:
step S111, detecting whether the current is increased or decreased to exceed the positive and negative preset range of the first calibration current;
if yes, go to step S112; if not, returning to the step S110;
step S112, adjusting the rotating speed of the motor, and obtaining the working current after the rotating speed of the motor is adjusted;
step S113, acquiring a corresponding second calibration current after the motor rotating speed is adjusted, and judging whether the working current is within a positive and negative preset range of the second calibration current;
if so, controlling the rotating speed of the motor to be the adjusted rotating speed; if not, the process returns to step S112.
4. The control method of a range hood according to claim 3, wherein in step S111, if the detected real-time current value decreases to exceed the preset positive and negative ranges of the first calibration current, step S112 and step S113 specifically include:
step S112, increasing the rotating speed of the motor, and obtaining the working current after the rotating speed of the motor is increased;
step S113, acquiring a corresponding third calibration current after the rotating speed of the motor is increased, and judging whether the first working current is within a positive and negative preset range of the third calibration current;
if so, controlling the rotating speed of the motor to be the increased rotating speed; if not, the process returns to step S112.
5. The control method of a range hood according to claim 3, wherein in step S111, if the detected real-time current value increases to exceed the positive and negative preset ranges of the first calibration current, step S112 and step S113 specifically include:
step S112, reducing the rotating speed of the motor, and obtaining the working current after the rotating speed of the motor is reduced;
step S113, acquiring a corresponding fourth calibration current after the rotating speed of the motor is reduced, and judging whether the working current is within a positive and negative preset range of the fourth calibration current;
if so, controlling the rotating speed of the motor to be the reduced rotating speed; if not, the process returns to step S112.
6. A control method of a range hood according to claim 1, 2 or 3, wherein in step S101, the range hood is started, and before the motor speed is gradually increased, the method further comprises the following steps:
and acquiring air quantities corresponding to different full-pressure values of the range hood, and acquiring the motor rotating speed and the required calibration current meeting the corresponding air quantities.
7. The control method of the range hood according to claim 6, wherein the method for testing the air volume corresponding to different full pressure values of the range hood and obtaining the motor speed and the motor current under the corresponding air volume comprises the following steps:
dividing the space between the zero full pressure value and the maximum full pressure value into a plurality of full pressure points;
according to the formula
A plurality of full pressure points which divide the cigarette machine respectivelyInputting P0 into a formula, and obtaining air volume Q corresponding to each full pressure point P0, wherein P0 is the full pressure point of the cigarette machine, Q is the air volume, K is a fixed value, D is the hole plate diameter of the flue resistance of the cigarette machine, D is a correction parameter of the cigarette machine, and rho is the air density;
and obtaining the motor rotating speed and the calibration current which meet the corresponding air quantity Q.
8. The control method of the range hood according to claim 7, wherein the table data of the formation of the air quantity Q corresponding to each full pressure point and each full pressure point, the motor speed satisfying the corresponding air quantity Q and the calibration current is written into a controller of the range hood.
9. The control method of the range hood according to claim 1, wherein the calibrated rotating speed is the rotating speed of the motor reaching the set maximum air volume when the full pressure value of the range hood is zero.
10. The control method of a range hood according to claim 1, wherein a preset low full pressure section is set between a full pressure value of zero and a preset full pressure value, wherein the preset full pressure value is 80-150 PA.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112648665A (en) * | 2021-01-06 | 2021-04-13 | 宁波方太厨具有限公司 | Starting control method of range hood and range hood applying same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112648665A (en) * | 2021-01-06 | 2021-04-13 | 宁波方太厨具有限公司 | Starting control method of range hood and range hood applying same |
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