CN111121120B - Double-direct-current fan rotating speed control method and system and range hood - Google Patents
Double-direct-current fan rotating speed control method and system and range hood Download PDFInfo
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- CN111121120B CN111121120B CN201811281657.4A CN201811281657A CN111121120B CN 111121120 B CN111121120 B CN 111121120B CN 201811281657 A CN201811281657 A CN 201811281657A CN 111121120 B CN111121120 B CN 111121120B
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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
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Abstract
The invention relates to a method for controlling the rotating speed of double direct current fans, which comprises the steps of calculating the rotating speed difference delta W between W1 and W2 as W1-W2; and judging whether the delta W is positioned in the different sound rotating speed difference interval epsilon of the master direct-current fan and the slave direct-current fan, and if so, adjusting the rotating speed W2 of the slave direct-current fan until the delta W is outside the interval epsilon. The invention also relates to a double-direct-current-fan rotating speed control system which comprises a main direct-current fan, a slave direct-current fan, a main controller, a main direct-current-fan driving controller and a slave direct-current-fan driving controller. The invention also relates to a range hood, which comprises a smoke collecting hood, a main direct current fan and a secondary direct current fan, wherein the main direct current fan and the secondary direct current fan are arranged in the smoke collecting hood, and the secondary direct current fan and the main direct current fan are sequentially arranged along the moving path of the oil smoke. The method and the system for controlling the rotating speed of the double direct current fans and the range hood have the advantages of high static pressure, low noise and good oil smoke suction effect.
Description
Technical Field
The invention relates to a double-direct-current fan rotating speed control method, a double-direct-current fan rotating speed control system and a range hood applying the double-direct-current fan rotating speed control method and system.
Background
The existing oil smoke exhauster usually adopts an alternating current motor, the speed regulation performance of the alternating current motor is poor, the speed regulation range is small, and the situations of increasing energy consumption and noise caused by unclean oil smoke suction or overlarge air volume are easy to occur during use. The invention discloses a constant power control device of a direct current fan of a range hood, which is a Chinese patent with an authorization publication number of CN104121217B (application number of 201410372155.8), wherein the scheme disclosed in the invention uses the direct current fan in the range hood, the direct current fan has low power consumption and low noise, and has good debugging performance, and stepless speed regulation of the direct current fan can be realized.
If the double direct current fans are installed in the range hood and the two direct current fans are controlled according to the current control method respectively, because the two direct current fans need to share one cavity, the air channel change of one direct current fan is different when the direct current fans rotate at different speeds, the two direct current fans can affect each other when working, the control difficulty is improved, the failure rate is high, and the noise can not meet the set requirement due to the difference of the rotating speeds between the two direct current fans when working.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a method and a system for controlling the rotation speed of two dc fans and a range hood, which have the advantages of large static pressure, good smoking effect, effective control of the influence between two dc fans, and low noise.
The technical scheme adopted by the invention for solving the problems is as follows: a method for controlling the rotating speed of a double direct current fan is characterized by comprising the following steps:
s1, controlling the main direct current fan to rotate, and detecting and acquiring the rotating speed W1 of the main direct current fan;
s2, controlling the slave direct current fan to rotate according to the set rotating speed W2;
s3, calculating the rotating speed difference delta W between W1 and W2 to be W1-W2;
s4, judging whether the delta W is located in the interval epsilon of the different sound rotating speeds of the master direct current fan and the slave direct current fan, if so, adjusting the rotating speed W2 of the slave direct current fan until the delta W is located outside the epsilon.
In order to effectively start the main direct current fan and the auxiliary direct current fan, the starting method of the double direct current fans comprises the following steps: and starting the main direct current fan according to the set starting current I1, controlling the main direct current fan to rotate according to a constant torque working mode, starting the auxiliary direct current fan according to the set rotating speed after the rotating speed of the main direct current fan is stable, and further carrying out S1-S4.
Preferably, after the master direct current fan and the slave direct current fan are started, the master direct current fan is controlled to rotate according to a control requirement and a set current I2, and a current static pressure interval value is determined according to a current I2 and the current rotation speed of the master direct current fan obtained through detection and a stored corresponding relation between a current and a rotation speed-static pressure interval; controlling the slave direct current fan to rotate according to the rotation speed of the slave direct current fan corresponding to the current static pressure interval value according to the current static pressure interval value, and carrying out S1-S4;
and then according to the static pressure interval value N, the real-time rotating speed of the main direct current fan and the stored corresponding relation of the current-rotating speed-static pressure interval, calculating the working current I3 required by the main direct current fan, adjusting the current I2 of the main direct current fan to I3, further calculating to obtain the rotating speed value of the main direct current fan, further according to the current I3 and the detected rotating speed of the current main direct current fan, according to the stored corresponding relation of the current-rotating speed-static pressure interval, determining the current static pressure interval value, according to the current static pressure interval value, controlling the slave direct current fan to rotate according to the rotating speed of the slave direct current fan corresponding to the current static pressure interval value, and further performing S1 to S4.
Preferably, the corresponding rotation speed values of the slave direct current fan are respectively set for different static pressure intervals.
In order to effectively ensure the emission of oil smoke, when the slave direct current fan breaks down, the master direct current fan is controlled to rotate according to a constant-torque working mode by using the maximum working current.
Preferably, when the main direct current fan fails, the main direct current fan and the slave direct current fan are controlled to be shut down.
The utility model provides a two direct current fan rotational speed control system which characterized in that: the system comprises a main direct current fan, a slave direct current fan, a main controller, a main direct current fan drive controller and a slave direct current fan drive controller; the main direct current fan drive controller is electrically connected with the main controller and the main direct current fan respectively, and the slave direct current fan drive controller is electrically connected with the main direct current fan drive controller and the slave direct current fan respectively.
The utility model provides a two direct current fan rotational speed control system which characterized in that: the system comprises a main direct current fan, a slave direct current fan, a main controller, a main direct current fan drive controller and a slave direct current fan drive controller; the main direct current fan driving controller is electrically connected with the main controller and the main direct current fan respectively, and the slave direct current fan driving controller is electrically connected with the main controller and the slave direct current fan respectively.
A range hood, its characterized in that: the range hood comprises a smoke collection hood, a main direct current fan and a slave direct current fan, wherein the main direct current fan and the slave direct current fan are arranged in the smoke collection hood in sequence along the moving path of oil smoke.
Compared with the prior art, the invention has the advantages that: according to the method and the system for controlling the rotating speed of the double direct current fans and the range hood, two direct current fans are adopted, one direct current fan is used as a main direct current fan, the other direct current fan is used as a slave direct current fan, the rotating speed of the main direct current fan is changed according to requirements, the slave direct current fan is used as an auxiliary fan, and the rotating speed of the slave direct current fan works according to the working condition of the main direct current fan and the corresponding fixed rotating speed. Two direct current fans work simultaneously, and the rotational speed of two direct current fans need not to work can exert good oil absorption cigarette effect on higher rotational speed, and the noise is little, and the comfort level that the user used is high. And the two direct current fans work according to the double direct current fan rotating speed control method, so that the influence between the two direct current fans can be effectively reduced, abnormal sound caused by the influence between the two direct current fans is avoided, and no abnormal sound is generated during working.
Drawings
Fig. 1 is a block diagram of a dual dc fan rotational speed control system according to an embodiment of the present invention.
Fig. 2 is a block diagram of another dual dc fan rotational speed control system according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The method for controlling the rotating speed of the dual direct current fan in the embodiment can be applied to various environments requiring fans, and the method for controlling the rotating speed of the dual direct current fan, the system for controlling the rotating speed of the dual direct current fan, and the range hood using the method for controlling the rotating speed of the dual direct current fan and the system for controlling the rotating speed of the dual direct current fan are respectively described in detail in the embodiment by taking the use of the method in the range hood as an example.
The range hood in the embodiment comprises a smoke collection hood, a main direct current fan 1 and a slave direct current fan 2, wherein the main direct current fan 1 and the slave direct current fan 2 are arranged in the smoke collection hood in sequence along the moving path of the oil smoke. Namely, the secondary direct current fan 2 is arranged close to the kitchen range, and the primary direct current fan 1 is arranged close to the oil smoke outlet of the range hood.
As shown in fig. 1, the dual dc fan rotation speed control system may adopt a system including a master dc fan 1, a slave dc fan 2, a master controller 3, a master dc fan drive controller 4, and a slave dc fan drive controller 5; the main direct current fan driving controller 4 is electrically connected with the main controller 3 and the main direct current fan 1 respectively, and the slave direct current fan driving controller 5 is electrically connected with the main direct current fan driving controller 4 and the slave direct current fan 2 respectively. In the system, the main controller 3 is responsible for sending control signals of the main direct current fan 1 and the slave direct current fan 2 to the main direct current fan drive controller 4 and receiving the rotating speed, current and fault information of the main direct current fan 1 and the slave direct current fan 2 transmitted by the main direct current fan drive controller 4. The master dc fan drive controller 4 can transmit a control signal of the slave dc fan 2 to the slave dc fan 2 controller, and can receive information on the rotational speed, current, and failure of the slave dc fan 2.
As shown in fig. 1, the dual dc fan rotation speed control system may also adopt a system as required, where the system includes a master dc fan 1, a slave dc fan 2, a master controller 3, a master dc fan drive controller 4, and a slave dc fan drive controller 5; the main direct current fan driving controller 4 is electrically connected with the main controller 3 and the main direct current fan 1 respectively, and the slave direct current fan driving controller 5 is electrically connected with the main controller 3 and the slave direct current fan 2 respectively. In the system, the main controller 3 directly sends corresponding control signals to the main dc fan drive controller 4 and the slave dc fan drive controller 5, and meanwhile, the main controller 3 can receive corresponding rotating speed, current and fault information sent by the main dc fan drive controller 4 and the slave dc fan drive controller 5.
The method for controlling the rotating speed of the double direct current fans comprises the following steps:
when the double direct current fans are needed to work, the main direct current fan 1 and the slave direct current fan 2 are started firstly, and the starting method of the double direct current fans is as follows: supplying the set starting current I1 to the main direct current fan 1, further starting the main direct current fan 1, and controlling the main direct current fan 1 to rotate according to a constant torque working mode under the action of the starting current I1; after the rotation speed of the main direct current fan 1 is stable, when judging whether the rotation speed of the main direct current fan 1 is stable, a rotation speed detection method can be adopted, a time value t can also be set according to experience, and when the time after the main direct current fan 1 is started reaches t, the rotation speed of the main direct current fan 1 is judged to be stable; further starting the secondary direct current fan 2 according to the set rotating speed, wherein in the concrete implementation, the secondary direct current fan 2 is supplied with current corresponding to the set rotating speed, and the secondary direct current fan 2 is controlled to be started according to a constant rotating speed mode; after the master dc fan 1 and the slave dc fan 2 are both started, the following processes from S1 to S4 are performed to adjust the rotation speed of the slave dc fan 2, thereby preventing the occurrence of abnormal noise due to the mutual influence between the master dc fan 1 and the slave dc fan 2.
Before the product leaves a factory, a defined static pressure interval is stored in the main controller 3 in advance, each static pressure interval corresponds to a static pressure interval number, the static pressure interval number is stored as a static pressure interval value, and a corresponding relation curve of a current-rotating speed-static pressure interval is also stored in the main controller 3.
Considering that floors and air ducts of different user homes are different, the maximum static pressure is also different, and the double-direct-current fan system can be selected to work according to an intelligent cruise mode, namely, the working current value of the main direct-current fan 1 is automatically matched according to the static pressure interval value of the user home, and then the main direct-current fan 1 is driven to run by the automatically matched current value.
After the main direct current fan 1 and the slave direct current fan 2 are started, according to the control requirement of the intelligent cruise mode, firstly, the main direct current fan 1 is controlled to rotate according to the set current I2, after the main direct current fan enters the intelligent cruise mode, the main direct current fan 1 is correspondingly changed under the action of external static pressure, and then, according to the current I2 and the detected and obtained rotating speed of the current main direct current fan 1, the current static pressure interval value is determined according to the stored corresponding relation of the current-rotating speed-static pressure interval. And controlling the slave direct current fan 2 to rotate according to the rotating speed of the slave direct current fan 2 corresponding to the current static pressure interval value according to the current static pressure interval value, and further performing the following adjusting processes from S1 to S4 according to the rotating speed of the current master direct current fan 1 and the rotating speed of the slave direct current fan 2.
Then, according to the current static pressure interval value, the real-time rotation speed of the main direct current fan 1 and the stored corresponding relation between the current and the rotation speed of the main direct current fan 1, the working current I3 required by the main direct current fan 1 is calculated, the current I2 of the main direct current fan 1 is adjusted to I3, the rotation speed value of the main direct current fan 1 corresponding to I3 is further calculated and obtained, the current static pressure interval value is determined according to the current I3 and the rotation speed of the current main direct current fan 1 obtained through detection and the stored corresponding relation between the current and the rotation speed of the static pressure interval, the slave direct current fan 2 is controlled to rotate according to the rotation speed of the slave direct current fan 2 corresponding to the current static pressure interval value according to the current static pressure interval value, and the following adjustment processes from S1 to S4 are further performed according to the current rotation speed of the main direct current fan 1 and the rotation speed of the slave direct current fan 2. Thus, the loop control is performed according to the content of the segment.
And respectively setting corresponding rotating speed values of the slave direct current fan 2 aiming at different static pressure intervals. In the present embodiment, the static pressure interval is divided into 10 intervals, and the values of the static pressure intervals are 1 to 10, respectively. In order to simplify the control, in the present embodiment, the rotation speed of the slave dc fan 2 is adjusted to W01 when the static pressure interval value N < 3, and the rotation speed of the slave dc fan 2 is adjusted to W02 when the static pressure interval value N > 3.
When the direct current fan control system works, the following adjusting steps are carried out in real time according to the rotating speed collecting periods of the main direct current fan 1 and the slave direct current fan 2, and abnormal sound caused by mutual influence between the main direct current fan 1 and the slave direct current fan 2 is avoided.
S1, controlling the main direct current fan 1 to rotate, and detecting and acquiring the rotating speed W1 of the main direct current fan 1;
s2, controlling the secondary direct current fan 2 to rotate according to the set rotating speed W2;
s3, calculating the rotating speed difference delta W between W1 and W2 to be W1-W2;
s4, whether the delta W is located in the interval epsilon of the different sound rotating speeds of the master direct current fan 2 and the slave direct current fan 2 is judged, if yes, the rotating speed W2 of the slave direct current fan 2 is adjusted until the delta W is outside the interval epsilon.
In this embodiment, when the rotation speed W2 of the slave dc fan 2 is adjusted, W2 ═ W2+ a or W2 ═ W2-B, A, B indicates a step value per adjustment, and 0RPM < (a, B) < 50RPM in this embodiment.
W1 and W2 in S1 and S4 are not fixed values and are only used for representing rotating speed values acquired at the calculating moment.
When the slave direct current fan 2 has a fault, the master direct current fan 1 is controlled to rotate at the maximum working current according to a constant-torque working mode. And when the main direct current fan 1 breaks down, the main direct current fan 1 and the slave direct current fan 2 are controlled to be shut down.
According to the method and the system for controlling the rotating speed of the double direct current fans and the range hood, two direct current fans are adopted simultaneously, one direct current fan is used as a main direct current fan 1, the other direct current fan is used as a slave direct current fan 2, the rotating speed of the main direct current fan 1 is changed according to requirements, the slave direct current fan 2 is used as an auxiliary fan, and the rotating speed of the slave direct current fan 2 works according to the working condition of the main direct current fan 1 and the corresponding fixed rotating speed. Two direct current fans work simultaneously, and the rotational speed of two direct current fans need not to work can exert good oil absorption cigarette effect on higher rotational speed, and the noise is little, and the comfort level that the user used is high. And the two direct current fans work according to the double direct current fan rotating speed control method, so that the influence between the two direct current fans can be effectively reduced, abnormal sound caused by the influence between the two direct current fans is avoided, and no abnormal sound is generated during working.
Claims (8)
1. A method for controlling the rotating speed of a double direct current fan is characterized by comprising the following steps: after the main direct current fan (1) and the slave direct current fan (2) are started, the main direct current fan (1) is controlled to rotate according to a control requirement and a set current I2, and a current static pressure interval value is determined according to a current I2 and the detected and obtained current rotating speed of the main direct current fan (1) and a stored corresponding relation of a current-rotating speed-static pressure interval; controlling the slave direct current fan (2) to rotate according to the rotating speed of the slave direct current fan (2) corresponding to the current static pressure interval value according to the current static pressure interval value, and carrying out S1-S4;
then, according to the static pressure interval value N, the real-time rotating speed of the main direct current fan (1), and according to the stored corresponding relation of current-rotating speed-static pressure interval, calculating the working current I3 required by the main direct current fan (1), adjusting the current I2 of the main direct current fan (1) to I3, further calculating to obtain the rotating speed value of the main direct current fan (1), further according to the current I3 and the detected rotating speed of the current main direct current fan (1), according to the stored corresponding relation of current-rotating speed-static pressure interval, determining the current static pressure interval value, according to the current static pressure interval value, controlling the slave direct current fan (2) to rotate according to the rotating speed of the slave direct current fan (2) corresponding to the current static pressure interval value, and further performing S1 to S4:
s1, controlling the main direct current fan (1) to rotate, and detecting and acquiring the rotating speed W1 of the main direct current fan (1);
s2, controlling the secondary direct current fan (2) to rotate according to the set rotating speed W2;
s3, calculating the rotating speed difference delta W between W1 and W2 to be W1-W2;
s4, judging whether the delta W is located in the interval epsilon of the different sound rotating speeds of the master direct current fan (2) and the slave direct current fan (2), if so, adjusting the rotating speed W2 of the slave direct current fan (2) until the delta W is outside the interval epsilon.
2. The method for controlling the rotating speed of the double direct current fans according to claim 1, wherein: the starting method of the double direct current fans comprises the following steps: the method comprises the steps of starting a main direct current fan (1) according to a set starting current I1, controlling the main direct current fan (1) to rotate according to a constant torque working mode, starting a slave direct current fan (2) according to a set rotating speed after the rotating speed of the main direct current fan (1) is stabilized, and further carrying out S1-S4.
3. The method for controlling the rotating speed of the double direct current fans according to claim 1, wherein: and respectively setting corresponding rotating speed values of the slave direct current fan (2) aiming at different static pressure intervals.
4. The method for controlling the rotating speed of the double direct current fans according to any one of claims 1 to 3, characterized in that: when the slave direct current fan (2) breaks down, the master direct current fan (1) is controlled to rotate according to a constant-torque working mode at the maximum working current.
5. The method for controlling the rotating speed of the double direct current fans according to any one of claims 1 to 3, characterized in that: when the main direct current fan (1) breaks down, the main direct current fan (1) and the slave direct current fan (2) are controlled to be shut down.
6. A dual dc fan speed control system using the method of any one of claims 1 to 5, wherein: the system comprises a main direct current fan (1), a slave direct current fan (2), a main controller (3), a main direct current fan drive controller (4) and a slave direct current fan drive controller (5); the main direct current fan drive controller (4) is electrically connected with the main controller (3) and the main direct current fan (1) respectively, and the slave direct current fan drive controller (5) is electrically connected with the main direct current fan drive controller (4) and the slave direct current fan (2) respectively.
7. A dual dc fan speed control system using the method of any one of claims 1 to 5, wherein: the system comprises a main direct current fan (1), a slave direct current fan (2), a main controller (3), a main direct current fan drive controller (4) and a slave direct current fan drive controller (5); the main direct current fan drive controller (4) is electrically connected with the main controller (3) and the main direct current fan (1) respectively, and the slave direct current fan drive controller (5) is electrically connected with the main controller (3) and the slave direct current fan (2) respectively.
8. A range hood using the dual dc fan speed control system according to claim 6 or 7, wherein: including the collection petticoat pipe and setting up main direct current fan (1), follow direct current fan (2) in the collection petticoat pipe, follow direct current fan (2) and main direct current fan (1) and arrange the setting in proper order along the removal route of oil smoke.
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| CN201811281657.4A CN111121120B (en) | 2018-10-31 | 2018-10-31 | Double-direct-current fan rotating speed control method and system and range hood |
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| CN111121120B true CN111121120B (en) | 2021-12-24 |
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| CN113048532B (en) * | 2020-12-30 | 2022-05-17 | 青岛海尔智慧厨房电器有限公司 | Smoke machine system and noise feedback control method and device thereof |
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