CN112648663B - Fan rotating speed control method and system of range hood and range hood - Google Patents
Fan rotating speed control method and system of range hood and range hood Download PDFInfo
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- CN112648663B CN112648663B CN202110006958.1A CN202110006958A CN112648663B CN 112648663 B CN112648663 B CN 112648663B CN 202110006958 A CN202110006958 A CN 202110006958A CN 112648663 B CN112648663 B CN 112648663B
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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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- 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
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Abstract
The invention relates to a fan rotating speed control method and a system of a range hood and the range hood, wherein a wind volume-wind inlet wind speed relation list of each wind speed test point at an air inlet corresponding to the range hood when the range hood is used for the first time is formed in advance, the walking speed of personnel and the ambient wind speed near the range hood are detected to obtain a personnel compensation wind speed value and an ambient compensation wind speed value, then the actual wind speed value of the air inlet of each wind speed test point is combined to obtain an air inlet wind speed correction value of each wind speed test point, the influence of the personnel walking and the ambient wind speed on the detected wind speed value of the air inlet of the range hood is eliminated, the judgment is carried out aiming at the air inlet standard wind speed average value and the air inlet wind speed correction average value of all air inlet standard wind speeds in the wind volume-air inlet wind speed relation list to determine whether the rotating speed of the fan needs to be increased or not, the rotating speed adjustment of the fan is started after the generation of oil smoke is detected, the hysteresis for controlling the rotating speed of the fan is avoided, and the timely adjustment for the rotating speed of the fan of the range hood is realized.
Description
Technical Field
The invention relates to the field of range hoods, in particular to a method and a system for controlling the rotating speed of a fan of a range hood and the range hood.
Background
The range hood has become a necessary kitchen electrical appliance in the household kitchen environment of users. The user can produce the oil smoke in the culinary art process, if not discharge the oil smoke in time, easily cause the harm to user's health. Therefore, through the operation of the range hood, the oil smoke in the kitchen environment can be discharged into the public flue, and the air in the kitchen environment is kept clean.
When the range hood is installed for the first time in a kitchen, in order to detect the installation state of the range hood, an installer usually uses a handheld anemometer to measure the air speed of an air inlet of the range hood so as to judge the conditions of back pressure and the like of a user's home, and thus whether the oil smoke absorption effect of the range hood installed in the user's kitchen reaches the standard is preliminarily judged.
In the long-term use process of the range hood, because the oil fume is adsorbed in the range hood for a long time, such as on parts such as an impeller, the fan load of the range hood can be increased, the air volume and the air pressure are reduced, the air speed of an air inlet of the range hood is reduced, and the oil fume absorption effect is reduced along with the reduction of the air speed, so that the oil fume absorption effect can be improved by adjusting the rotating speed of a fan of an oil fume absorption press. However, the fan speed and the fan gear of the conventional range hood during operation are fixed when leaving the factory, so that the actual requirement of people for adjusting the fan speed as required at any time cannot be met.
The chinese invention patent CN110107935B discloses a kitchen smoke exhaust system and a method for controlling the rotational speed of a fan of a range hood, wherein the method for controlling the rotational speed of the fan of the range hood responds to the rotational speed of the fan according to the output signal of a door and window sensor, and obtains the factor that the interference of the indoor smoke absorption effect is large through the door and window sensor, and can obtain the concentration information of the smoke in combination with the smoke sensor, and then correspondingly adjust the gear and the air volume of the fan, thereby better pre-determining the possible interference situation, realizing the self-adaptive adjustment of the rotational speed of the fan of the range hood, and improving the user experience.
Although the method for controlling the rotating speed of the fan of the range hood in the patent CN110107935B realizes automation and intellectualization to a certain extent, the method still has the following defects: because whether the judgment of the fan rotating speed needs to be adjusted is based on the oil smoke concentration information detected by the oil smoke sensor, namely, the adjustment judgment and the adjustment operation of the fan rotating speed can be executed again only after the oil smoke is generated and the oil smoke sensor detects the oil smoke concentration data. Obviously, this kind of fan rotational speed adjustment scheme based on just start after detecting oil smoke concentration information just starts the execution after the oil smoke is produced, belongs to the fan rotational speed adjustment control mode that lags relatively, can lead to range hood's the work of discharging fume to lag, reduces user's experience effect.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a method for controlling the rotation speed of a fan of a range hood in view of the above prior art.
The second technical problem to be solved by the present invention is to provide a fan rotation speed control system of a range hood for the above prior art.
The third technical problem to be solved by the invention is to provide a range hood with the fan rotating speed control system of the range hood.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the fan rotating speed control method of the range hood is characterized by comprising the following steps of:
step 1, when the range hood is used for the first time, a wind volume-air inlet wind speed relation list corresponding to each wind speed test point arranged at an air inlet of the range hood is formed in advance, and the air inlet wind speed in the wind volume-air inlet wind speed relation list is used as the standard air speed of the air inlet; wherein, the central position of the air inlet of the range hood and the left side position and the right side position which are symmetrically arranged at the central position are both provided with air speed test points;
step 3, detecting the ambient wind speed of the environment where the range hood is located to obtain an ambient compensation wind speed value aiming at the ambient wind speed;
step 4, detecting actual wind speed values of air inlets corresponding to all wind speed test points of the range hood when the range hood is started and operates stably;
step 5, respectively obtaining air inlet air speed correction values of the air speed test points according to the personnel compensation air speed value, the environment compensation air speed value and the detected actual air speed values of the air inlets of the air speed test points;
step 6, judging and processing according to the obtained air inlet air speed correction value of each air speed test point:
when the air inlet air speed correction value of each air speed test point meets a first preset condition, turning to step 7; otherwise, turning to the step 2;
step 7, calculating the average value of the standard wind speeds of the air inlets of all the standard wind speeds in the wind quantity-air inlet wind speed relation list and the corrected average value of the wind speeds of the air inlets of all the corrected values of the wind speeds of the air inlets;
step 8, judging and processing according to the standard wind speed average value of the air inlet and the corrected wind speed average value of the air inlet:
when the standard wind speed average value of the air inlet and the corrected wind speed average value of the air inlet meet a second preset condition, the rotating speed of a fan of the range hood is not adjusted; otherwise, the rotating speed of the fan of the range hood is increased.
In the fan rotating speed control method of the invention, a list of relationship between air quantity and air inlet wind speed corresponding to each wind speed test point at the air inlet corresponding to the range hood when in primary use is formed in advance, then the walking speed of personnel and the ambient wind speed near the range hood are respectively detected to obtain corresponding personnel compensation wind speed value and ambient compensation wind speed value, and then the detected actual wind speed value of the air inlet at the wind speed test point on the range hood is combined to process and obtain the air inlet wind speed correction value corresponding to each wind speed test point, the influence of the walking speed of personnel and the ambient wind speed on the detected air inlet wind speed value of the range hood is eliminated, and then judgment is made according to the air inlet standard wind speed average value and the air inlet wind speed correction average value of all air inlet standard wind speeds in the list of the relationship between the air quantity and the air inlet wind speed to determine whether the oil smoke absorption effect of the range hood needs to be enhanced by increasing the rotating speed of the fan, the adjustment operation of the rotating speed of the fan is not required to be started after the oil smoke is detected, the hysteresis of the control of the rotating speed of the fan is avoided, and the timely and automatic adjustment and control of the rotating speed of the fan of the range hood are effectively realized.
Further, in the method for controlling the rotating speed of the fan of the range hood, in step 2, the calculation formula of the personnel compensation wind speed value is as follows:
δ1＝k1·v1；
wherein, delta1Compensating the wind speed value, v, for the person1For the moving speed, k, of the person within a predetermined distance range of the range hood1To account for the compensation factor when the person is moving, k1∈[0.4,0.6]。
Still further, in the method for controlling the rotational speed of the fan of the range hood, in step 3, the calculation formula of the environmental compensation wind speed value is as follows:
δ2＝k2·v2；
wherein, delta2Compensating the wind speed value, v, for the environment2Is the ambient wind speed k of the environment where the range hood is located2To compensate for the coefficient of ambient wind speed, k2∈[0.2,0.4]。
Specifically, in the method for controlling the rotating speed of the fan of the range hood of the present invention, in step 6, the air inlet air speed correction value of any one of the air speed test points of the range hood is calculated as follows:
V'＝V-δ1-δ2；
and V' is the corrected air inlet air speed value of any one of the air speed test points, and V is the actual air inlet air speed value of any one of the air speed test points.
In addition, in the invention, the preset conditions in the step 7 are:
Wherein, V1' is an air inlet air speed correction value V ' corresponding to a first air speed test point arranged on the left side '2Is an air inlet air speed correction value V 'corresponding to a second air speed test point arranged at the middle position'3Is the air inlet air speed correction value corresponding to the third air speed test point arranged on the right side, K1Is a predetermined critical lower limit value, K2Is a predetermined critical upper limit value, K1>K2And 0 is<K1≤1，max(V'1,V'3) Expressing wind speed correction value V 'of air inlet'1And air inlet air speed corrected value V'3Maximum value of (2). For example, in the present invention, the critical lower limit value K is set1Set to 0.8, and set the critical upper limit value K2Set to 1.2.
In order to take countermeasures in time after the wind speed detection device fails, the method for controlling the rotating speed of the fan of the range hood further comprises the following steps: and when the times that the air inlet air speed correction value of each air speed test point does not meet the preset condition reach the preset fault-tolerant times, executing a countermeasure aiming at the fault of the air speed detection device.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the fan rotating speed control system for realizing the fan rotating speed control method of the range hood is characterized by comprising the following steps of:
the first speed detection device is used for detecting the moving speed of personnel within a preset distance range of the range hood;
the second speed detection device is used for detecting the ambient wind speed of the environment where the range hood is located;
the air speed detection device is used for detecting air speed values of the air inlet corresponding to the air speed test points of the range hood when the range hood is started;
the storage at least prestores an air quantity-air inlet air speed relation list corresponding to each air speed test point of the range hood;
and the controller can be connected with the fan, is respectively connected with the first speed detection device, the second speed detection device, the wind speed detection device and the memory, and processes the data according to the data detected by the first speed detection device, the second speed detection device and the wind speed detection device so as to control the fan to adjust the rotating speed.
Of course, the fan rotating speed control system of the invention can also comprise a prompting device connected with the controller, so that the prompting device can start fault prompting aiming at the wind speed detection device with fault according to the instruction of the controller.
The technical scheme adopted by the invention for solving the third technical problem is as follows: the range hood with the fan rotating speed control system comprises a fan and is characterized in that a controller of the fan rotating speed control system is connected with the fan.
In an improved way, in the invention, the range hood further comprises a control panel, and the control panel is integrated with the controller.
Compared with the prior art, the invention has the advantages that: the invention pre-forms a wind volume-air inlet wind speed relation list corresponding to each wind speed test point at the air inlet corresponding to the range hood when the range hood is used for the first time, then respectively detects the personnel walking speed and the environmental wind speed near the range hood to obtain the corresponding personnel compensation wind speed value and the environmental compensation wind speed value, and then combines the detected actual wind speed value of the air inlet at the wind speed test point on the range hood to process and obtain the air inlet wind speed correction value corresponding to each wind speed test point, eliminates the influence of the personnel walking and the environmental wind speed on the detected air inlet wind speed value of the range hood, and then judges the air inlet standard wind speed average value and the air inlet wind speed correction average value of all the air inlet standard wind speeds in the wind volume-air inlet wind speed relation list so as to determine whether the oil smoke absorption effect of the range hood aiming at the oil smoke needs to be enhanced by increasing the rotating speed of the fan, the adjustment operation of the rotating speed of the fan is not required to be started after the oil smoke is detected, the hysteresis of the control of the rotating speed of the fan is avoided, and the timely and automatic adjustment and control of the rotating speed of the fan of the range hood are effectively realized.
Drawings
FIG. 1 is a flow chart of a method for controlling the rotational speed of a fan of a range hood according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a fan speed control system according to an embodiment of the present invention;
fig. 3 is a schematic connection diagram of the main components in the range hood according to the embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The embodiment provides a fan rotating speed control method of a range hood, which is used for realizing automatic and intelligent control of the rotating speed of a fan. Specifically, the method for controlling the rotating speed of the fan of the range hood provided by the embodiment comprises the following steps:
step 1, when the range hood is used for the first time, a wind volume-air inlet wind speed relation list corresponding to each wind speed test point arranged at an air inlet of the range hood is formed in advance, and the air inlet wind speed in the wind volume-air inlet wind speed relation list is used as the standard air speed of the air inlet; wherein, the central position of the air inlet of the range hood and the left side position and the right side position which are symmetrically arranged at the central position are both provided with air speed test points;
for example, a wind speed test point 2 may be arranged at the center of an air inlet of the range hood, and a wind speed test point 1 and a wind speed test point 3 are correspondingly arranged at the air inlet and symmetrically arranged at the left and right sides of the wind speed test point 2, that is, the wind speed test point 1 and the wind speed test point 3 are symmetrically arranged relative to the wind speed test point 2;
for example, in the air volume-air inlet air speed relationship list, the air inlet air speed mark corresponding to the air speed test point 1 is Vstandard,1And the wind speed mark of the air inlet corresponding to the wind speed test point 2 is Vstandard,2And the wind speed mark of the air inlet corresponding to the wind speed test point 3 is Vstandard,3Then the wind speeds V of the three air inlets are adjustedstandard,1、Vstandard,2And Vstandard,3As the standard wind speed of the air inlet;
Step 3, detecting the ambient wind speed of the environment where the range hood is located to obtain an ambient compensation wind speed value aiming at the ambient wind speed; in this embodiment, the ambient compensated wind speed value is assumed to be labeled as δ2The ambient compensated wind speed value delta2＝k2·v2，v2Is the ambient wind speed k of the environment where the range hood is located2To compensate for the coefficient of ambient wind speed, k2∈[0.2,0.4]；
Step 4, detecting actual wind speed values of air inlets corresponding to all wind speed test points of the range hood when the range hood is started and operates stably;
suppose three winds are set up on the range hoodThe method comprises the steps that a speed test point 1, a wind speed test point 2 and a wind speed test point 3 are detected to obtain an actual wind speed value of an air inlet marked as V corresponding to the wind speed test point 1 when the range hood is started and stably operates1And the actual wind speed value of the air inlet corresponding to the wind speed test point 2 when the range hood is started and operates stably is marked as V2And the actual wind speed value of the air inlet corresponding to the wind speed test point 3 when the range hood is started and operates stably is marked as V3；
Step 5, compensating the wind speed value delta according to personnel1Environment compensated wind speed value delta2And the detected actual wind speed value of the air inlet of each wind speed test point respectively obtains the corrected value of the wind speed of the air inlet of each wind speed test point;
specifically, in this embodiment, it is assumed that the air inlet air speed correction value corresponding to the air speed test point 1 is marked as V'1And the air inlet air speed correction value corresponding to the air speed test point 2 is marked as V'2And marking an air inlet air speed corrected value corresponding to the air speed test point 3 as V'3Then, the calculation method of the air inlet air speed correction value corresponding to the three air speed test points is as follows:
V'1＝V1-δ1-δ2，V'2＝V2-δ1-δ2，V'3＝V3-δ1-δ2；
step 6, according to the obtained air inlet air speed correction value V 'of each air speed test point'1、V'2And V'3Judgment processing is made:
when the air inlet air speed correction value of each air speed test point meets the preset condition
And V'2≥max(V'1,V'3) When the wind speed test point 2 at the central position of the air inlet has the maximum wind speed value of the wind speeds corresponding to the three wind speed test points, the step 7 is carried out; otherwise, go toStep 2; wherein, K1Is a predetermined critical lower limit value, K2Is a predetermined critical upper limit value, K1>K2And 0 is<K11. ltoreq.1, this example sets the lower critical limit K1Set to 0.8, and set the critical upper limit value K2Set to 1.2; max (V'1,V'3) Expressing wind speed correction value V 'of air inlet'1And air inlet air speed corrected value V'3Maximum value of (1);
step 7, calculating the average value of the standard wind speeds of the air inlets of all the standard wind speeds in the wind quantity-air inlet wind speed relation list and the corrected average value of the wind speeds of the air inlets of all the corrected values of the wind speeds of the air inlets;
for example, in the air volume-air inlet wind speed relation list, the average value of the air inlet standard wind speeds of all the air inlet standard wind speeds is marked as
The wind speed correction average value of the actual wind speed values of the three wind inlets, namely the wind speed test point 1, the wind speed test point 2 and the wind speed test point 3 is marked as
Step 8, according to the average value of the actual wind speed of the air inlet
And the corrected average value of the wind speed of the air inlet
Judgment processing is made:
when the average value of the standard wind speed of the air inlet
The corrected average value of the wind speed smaller than the wind inlet in a preset time period delta T
During the operation, the wind speed generated by the fan of the range hood at the current rotating speed exceeds the standard wind speed of the air inlet of the range hood during the initial use within the preset time period delta T, and at the moment, the range hood can suck the oil smoke without increasing the rotating speed of the fan, so that the rotating speed of the fan of the range hood is not adjusted; otherwise, it is indicated that the wind speed generated by the rotating speed of the fan is low at this time, and the generated oil smoke is difficult to be pumped away by using the current rotating speed of the fan, so that the rotating speed of the fan of the range hood is increased at this time. The preset time period Δ T here can be set according to actual needs.
In the method for controlling the rotating speed of the fan in the embodiment, a list of relationship between air volume and air inlet wind speed corresponding to each wind speed test point at the air inlet corresponding to the range hood during the first use is formed in advance, then the walking speed of personnel and the ambient wind speed near the range hood are respectively detected to obtain a corresponding personnel compensation wind speed value and an ambient compensation wind speed value, and then an air inlet wind speed correction value corresponding to each wind speed test point is obtained by processing according to the detected actual wind speed value of the air inlet at the wind speed test point on the range hood, the influence of the walking speed of personnel and the ambient wind speed on the detected air inlet wind speed value of the range hood is eliminated, and then a judgment is made according to the air inlet standard wind speed average value and the air inlet wind speed correction average value of all air inlet standard wind speeds in the list of the wind volume and air inlet wind speed relationship to determine whether the oil smoke absorption effect of the range hood needs to be enhanced by increasing the rotating speed of the fan, the adjustment operation of the rotating speed of the fan is not required to be started after the oil smoke is detected, the hysteresis of the control of the rotating speed of the fan is avoided, and the timely and automatic adjustment and control of the rotating speed of the fan of the range hood are effectively realized.
Of course, in this embodiment, when it is detected that the inlet wind speed correction value of each wind speed test point does not satisfy the preset condition (i.e. the predetermined condition is not satisfied)
And V is2'≥max(V1',V3'))When the frequency of the wind speed detection device reaches the preset fault-tolerant frequency, fault prompt operation aiming at the fault of the wind speed detection device is executed. The preset fault-tolerant times can be set according to actual needs.
Referring to fig. 2, the embodiment provides a fan speed control system for implementing the fan speed control method. Specifically, the fan rotational speed control system of this embodiment includes:
the first speed detection device 11 is used for detecting the moving speed of personnel within a preset distance range of the range hood; wherein, the first speed detection device 11 adopts a microwave detection sensor;
the second speed detection device 12 is used for detecting the ambient wind speed of the environment where the range hood is located;
the wind speed detection device 13 is used for detecting wind speed values of the air inlet corresponding to the wind speed test points of the range hood when the range hood is started to operate; the air speed value of the air inlet detected by the air speed detection device 13 comprises an air speed value of the air inlet of each air speed test point corresponding to the range hood when the range hood is used for the first time and an actual air speed value of the air inlet corresponding to each air speed test point when the range hood is started and operates stably;
the memory 14 at least prestores an air quantity-air inlet air speed relation list corresponding to each air speed test point of the range hood;
and a controller 15 which can be connected with the fan, wherein the controller 15 is respectively connected with the first speed detection device 11, the second speed detection device 12, the wind speed detection device 13 and the memory 14, and processes according to data detected by the first speed detection device 11, the second speed detection device 12 and the wind speed detection device 13 so as to control the fan to adjust the rotating speed.
Of course, the fan speed control system of this embodiment further includes a prompting device 16 connected to the controller 15, according to the actual setting requirement, to prompt when the device is out of order. The prompting device 16 gives a trouble alarm according to the prompting instruction of the controller 15.
Referring to fig. 3, the embodiment further provides a range hood applying the above fan speed control system, the range hood includes a fan 2 and a control board (not shown in the figure) integrated with the controller 15, and the controller 15 of the fan speed control system is connected to the fan 2.
Claims (10)
1. The fan rotating speed control method of the range hood is characterized by comprising the following steps of:
step 1, when the range hood is used for the first time, a wind volume-air inlet wind speed relation list corresponding to each wind speed test point arranged at an air inlet of the range hood is formed in advance, and the air inlet wind speed in the wind volume-air inlet wind speed relation list is used as the standard air speed of the air inlet; wherein, the central position of the air inlet of the range hood and the left side position and the right side position which are symmetrically arranged at the central position are both provided with air speed test points;
step 2, detecting the movement speed of personnel in a preset distance range of the range hood to obtain a personnel compensation wind speed value aiming at the influence of the movement of the personnel;
step 3, detecting the ambient wind speed of the environment where the range hood is located to obtain an ambient compensation wind speed value aiming at the ambient wind speed;
step 4, detecting actual wind speed values of air inlets corresponding to all wind speed test points of the range hood when the range hood is started and operates stably;
step 5, respectively obtaining air inlet air speed correction values of the air speed test points according to the personnel compensation air speed value, the environment compensation air speed value and the detected actual air speed values of the air inlets of the air speed test points;
step 6, judging and processing according to the obtained air inlet air speed correction value of each air speed test point:
when the air inlet air speed correction value of each air speed test point meets a first preset condition, turning to step 7; otherwise, turning to the step 2;
step 7, calculating the average value of the standard wind speeds of the air inlets of all the standard wind speeds in the wind quantity-air inlet wind speed relation list and the corrected average value of the wind speeds of the air inlets of all the corrected values of the wind speeds of the air inlets;
step 8, judging and processing according to the standard wind speed average value of the air inlet and the corrected wind speed average value of the air inlet:
when the standard wind speed average value of the air inlet and the corrected wind speed average value of the air inlet meet a second preset condition, the rotating speed of a fan of the range hood is not adjusted; otherwise, the rotating speed of the fan of the range hood is increased.
2. The fan speed control method of a range hood according to claim 1, wherein in step 2, the calculation formula of the personnel compensation wind speed value is as follows:
δ1＝k1·v1；
wherein, delta1Compensating the wind speed value, v, for the person1For the moving speed, k, of the person within a predetermined distance range of the range hood1To account for the compensation factor when the person is moving, k1∈[0.4,0.6]。
3. The fan speed control method of a range hood according to claim 2, wherein in step 3, the calculation formula of the environmental compensation wind speed value is as follows:
δ2＝k2·v2；
wherein, delta2Compensating the wind speed value, v, for the environment2Is the ambient wind speed k of the environment where the range hood is located2To compensate for the coefficient of ambient wind speed, k2∈[0.2,0.4]。
4. The method for controlling the rotational speed of the fan of the range hood according to claim 3, wherein in step 6, the correction value of the wind speed at the wind inlet of any one of the wind speed test points of the range hood is calculated as follows:
V'＝V-δ1-δ2；
and V' is the corrected air inlet air speed value of any one of the air speed test points, and V is the actual air inlet air speed value of any one of the air speed test points.
5. The method for controlling the rotating speed of the fan of the range hood according to claim 4, wherein the first preset condition in the step 7 is:
Wherein, V1' is an air inlet air speed correction value corresponding to a first air speed test point arranged on the left side, V2' is an air inlet air speed correction value V corresponding to a second air speed test point arranged at the middle position3' is an air inlet air speed correction value corresponding to a third air speed test point arranged on the right side, K1Is a predetermined critical lower limit value, K2Is a predetermined critical upper limit value, K1>K2And 0 is<K1≤1，max(V1',V3') shows the corrected value V of the wind speed at the air inlet1' and wind speed correction value V of air inlet3The maximum value in.
6. The fan rotating speed control method of the range hood according to any one of claims 1 to 5, further comprising: and when the times that the air inlet air speed correction value of each air speed test point does not meet the preset condition reach the preset fault-tolerant times, executing a countermeasure aiming at the fault of the air speed detection device.
7. The fan rotation speed control system for realizing the fan rotation speed control method of the range hood as claimed in claim 1 is characterized by comprising the following steps:
the first speed detection device (11) is used for detecting the moving speed of personnel within a preset distance range of the range hood;
the second speed detection device (12) is used for detecting the ambient wind speed of the environment where the range hood is located;
the air speed detection device (13) is used for detecting air speed values of the air inlet corresponding to the air speed test points of the range hood when the range hood is started to operate;
the storage (14) at least prestores an air quantity-air inlet air speed relation list corresponding to each air speed test point of the range hood;
and the controller (15) can be connected with the fan, the controller (15) is respectively connected with the first speed detection device (11), the second speed detection device (12), the wind speed detection device (13) and the memory (14), and processing is carried out according to data detected by the first speed detection device (11), the second speed detection device (12) and the wind speed detection device (13) so as to control the fan to adjust the rotating speed.
8. The fan speed control system according to claim 7, further comprising a prompting device (16) connected to the controller (15).
9. A range hood applying the fan speed control system of claim 7 or 8, comprising a fan (2), wherein the controller (15) of the fan speed control system is connected with the fan (2).
10. The range hood of claim 9, further comprising a control panel integrated with the controller.
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| CN202110006958.1A CN112648663B (en) | 2021-01-05 | 2021-01-05 | Fan rotating speed control method and system of range hood and range hood |
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| CN202110006958.1A CN112648663B (en) | 2021-01-05 | 2021-01-05 | Fan rotating speed control method and system of range hood and range hood |
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| CN112648663B true CN112648663B (en) | 2021-10-29 |
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| JP6971481B2 (en) * | 2018-10-31 | 2021-11-24 | アイリスオーヤマ株式会社 | Blower |
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