CN111895465A - Automatic speed regulation method for range hood - Google Patents
Automatic speed regulation method for range hood Download PDFInfo
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- CN111895465A CN111895465A CN201910371738.1A CN201910371738A CN111895465A CN 111895465 A CN111895465 A CN 111895465A CN 201910371738 A CN201910371738 A CN 201910371738A CN 111895465 A CN111895465 A CN 111895465A
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- range hood
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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
An automatic speed regulating method of a range hood is characterized by comprising the following steps: 1. starting to detect the current value of the fan in real time; 2. low range run time TkeepAnd then the next step is carried out; 3. whether the main controller collects signals to average B and B is more than or equal to lambda1A1If yes, returning to the step 2, and if not, continuing the next step; 4. high-grade operating time TkeepAnd then the next step is carried out; 5. whether the average value B of the collected signals is more than or equal to lambda or not2A2If so, the procedure returns to step 2, and if not, the procedure returns to step 4. The invention has the advantages that: the method directly adopts a pure software control mode to judge whether the flue is blocked, not only saves the cost, but also has simple and easy control method; the problem of the uniformity of the alternating current motor and the current transformer is solved, and the accuracy of a detection result is improved.
Description
Technical Field
The invention relates to a range hood device, in particular to an automatic speed regulation method of a range hood.
Background
Along with the process of urbanization, present house floor is higher and higher, the oil smoke that domestic high-rise residence pump drainage kitchen culinary art produced adopts "tobacco pipe formula" design mostly, the public flue of tens of users of different floors, when the work is opened at same time quantum to the kitchen lampblack absorber of touchhing different floors, a large amount of oil smoke is discharged into public flue, and the oil smoke can bring certain retardation after flue long distance motion, make the internal pressure increase of public flue, thereby influence the oil extraction cigarette effect of each user family, if the amount of wind gear of lampblack absorber can not be adjusted in time this moment, the lampblack absorber just hardly discharges the oil smoke fast, cause the oil smoke in user's family to receive the jam easily.
In the prior art, a chinese patent "an automatic speed regulating circuit for wind pressure detection of range hood", with a patent number of 201621239948.3, is designed to solve the disadvantages of the prior art, and a circuit for realizing automatic speed regulation for wind pressure detection of range hood is added on the basis of the existing wind pressure detection circuit, and devices such as a full wave rectifier bridge, a sliding rheostat and the like are added, so that real-time detection of wind pressure and automatic speed regulation of a motor are realized, and the burden of manually operating the range hood in the cooking process of a user is avoided; however, this patent requires that the reference deviation range of the current value input to the chip is corrected by changing the resistance value of the sliding rheostat, the additional processing cost is increased by adding the sliding rheostat, and the procedure of adjusting the resistance value of the sliding rheostat is required in the whole production link, so that the processing procedure of the whole circuit becomes complicated, and the production procedure is increased, therefore, further improvement is required to simplify the production, and the production cost is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic speed regulating method of a range hood, which is simpler and more convenient to regulate on the basis of not increasing the production cost, aiming at the current situation of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: an automatic speed regulating method of a range hood is characterized by comprising the following steps:
(1) starting a program, and detecting the current value of a fan of the range hood in real time;
(2) the range hood runs at a low gear and has a running time TkeepThen, the next step is carried out;
(3) the main controller collects the current value of the fan detected in real time, obtains the average value of the voltage of the fan as B after AD signal conversion, and judges whether B is more than or equal to a set value lambda1A1If yes, returning to the step (2), if no, returning to the step (2)Continuing the next step; wherein λ is1The proportionality coefficient set for low-gear operation of the range hood, A1The average value of the fan voltage is the average value of the fan voltage when the range hood runs at a low gear under the condition of smooth flue;
(4) the range hood is switched to high-grade operation, and the operation time TkeepThen, the next step is carried out;
(5) the main controller collects the current value of the fan detected in real time, obtains the average value of the voltage of the fan as B after AD signal conversion, and judges whether B is more than or equal to a set value lambda2A2If yes, returning to the step (2), and if not, returning to the step (4); wherein λ is2The proportionality coefficient set for high-grade operation of the range hood, A2The average value of the fan voltage of the range hood in high-grade operation is the average value of the fan voltage in the state of unobstructed flue.
Average value A of fan voltage1For the pre-measured value obtained in the factory test mode, it is further preferable that the average value A of the fan voltage is1Obtained by the following method: the range hood is placed in a state that a flue is unobstructed, the range hood is switched to a low gear, and the running time T is1After the range hood operates stably, the main controller collects a fan current signal and obtains a fan voltage average value A after AD conversion1And A is1Writing into the memory of the host controller.
Average value A of fan voltage2For the pre-measured value obtained in the factory test mode, it is further preferable that the average value A of the fan voltage is2Obtained by the following method: the range hood is placed in a state that a flue is unobstructed, the range hood is switched to a high grade, and the running time is T1After the range hood operates stably, the main controller collects a fan current signal and obtains a fan voltage average value A after AD conversion2And A is2Writing into the memory of the host controller.
Considering that the current value of the fan changes in real time during actual work, in order to effectively judge the smooth condition of the flue and ensure that the range hood can make a timely gear adjustment reaction, the proportional coefficient lambda is preferably1、λ2Can be 0.75 to lambda1＝λ2≤0.85。
In order to prevent frequent jumping of the range hood gear when the change of the fan current value is large and ensure the stability of the operation of the range hood, the operation time T is preferably selectedkeepHas a value range of T being not more than 4skeep≤6s。
In order to ensure the accuracy and stability of the measured values in the factory test process, the running time T is preferably selected1The value range of (1.5 s) is less than or equal to T1≤2s。
Compared with the prior art, the invention has the advantages that: the method has the advantages that whether the flue is blocked or not is judged directly by adopting a software control mode, and a slide rheostat is not required to be additionally arranged in a test circuit, so that the cost is saved, and the control method is simple and feasible; write into main control unit's memory with initial operating mode in advance, simultaneously, set up the proportionality coefficient and judge whether unobstructed in the flue, solved alternating current motor and current transformer's uniformity problem, improved the accuracy of testing result for range hood's speed governing is more stable and reliable, and user experience is better.
Drawings
Fig. 1 is a control flow chart of an automatic speed control method according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, the present embodiment discloses an automatic speed regulating method of a range hood, which adopts an existing wind pressure detection circuit and is implemented by the following steps:
(1) starting a program, and detecting the current value of a fan of the range hood in real time; the fan of the embodiment works by adopting alternating voltage, the current value of the fan can change along with the condition that whether the flue is unobstructed or not in the working process, and when the flue is unobstructed, the fan rotates quickly, and the working current of the fan is large; when the flue is blocked, the resistance of the fan is large, the rotating speed is reduced, and at the moment, the working current of the fan is reduced;
(2) and range hood openerAfter starting, the system defaults to operate in a low gear and has an operation time TkeepThen, the next step is carried out;
(3) the main controller collects the current value of the fan detected in real time, the main controller of the embodiment adopts the single chip microcomputer, and only voltage signals can be collected at present between the single chip microcomputer, so that the current value of the fan current signals collected by the single chip microcomputer is converted into a voltage value after AD conversion, the average value of the fan voltage is obtained as B, and whether the B is more than or equal to a set value lambda or not is judged1A1If yes, indicating that the user flue is unobstructed, returning to the step (2), and if not, indicating that the user flue is blocked, continuing to the next step; wherein λ is1The proportionality coefficient set for low-gear operation of the range hood, A1The average value of the fan voltage is the average value of the fan voltage when the range hood runs at a low gear under the condition of smooth flue;
(4) the range hood is switched to high-grade operation, and the operation time TkeepThen, the next step is carried out;
(5) the main controller collects the current value of the fan detected in real time, converts the current value into a voltage value after AD signal conversion, obtains the average value of the voltage of the fan as B, and judges whether the B is more than or equal to a set value lambda2A2If so, indicating that the user flue is unobstructed, returning to the step (2), and operating by using a low gear; if not, indicating that the user flue is blocked, returning to the step (4) to continue high-grade operation; wherein λ is2The proportionality coefficient set for high-grade operation of the range hood, A2The average value of the fan voltage of the range hood in high operation is the average value of the fan voltage in the state of unobstructed flue.
When the fan is switched between low-grade operation and high-grade operation, the current value of the fan detected in real time can also change, so that different set values lambda are respectively adopted when the fan is in low-grade operation and high-grade operation1A1And λ2A2To judge whether the flue is unobstructed.
In order to prevent frequent jumping of the range hood gear when the current of the fan changes greatly, the range hood needs to operate for a period of time after being switched to a low gear or a high gear, and the current value of the fan is collected after the range hood is stabilized to ensure the stability of the operation of the range hood, the range hood and the control method thereofRun time in step TkeepCan be set to T within a range of 4s to Tkeep≤6s。
Considering that the current value of the fan changes in real time during actual work and is difficult to be just kept at the limit point of a set value, in order to effectively judge the smooth condition of a flue and ensure that the range hood can make a timely gear adjustment response, a proportionality coefficient can be set in front of the fan voltage average value obtained by pre-testing, and the proportionality coefficient lambda is1、λ2Can be 0.75 to lambda1＝λ2≦ 0.85, in this embodiment, λ is set1＝λ20.8. Coefficient of proportionality λ1、λ2The setting sets an effective threshold value for the judgment of the main controller, and can ensure that the range hood can adjust the gear in time.
The average value A of the fan voltage in the steps1And A2The predetermined values obtained in the factory test mode may be realized by the following methods.
Average value A of fan voltage1Obtained by the following method: the range hood is placed in a testing environment with a smooth flue, the range hood is switched to a low gear, and the running time T is1After the range hood operates stably, the main controller collects a fan current signal, obtains a fan voltage signal after AD conversion and obtains an average value A1Then A is added1Writing into the memory of the host controller.
Average value A of fan voltage2Obtained by the following method: the range hood is placed in a testing environment with a smooth flue, the range hood is switched to a high grade, and the running time is T1After the range hood operates stably, the main controller collects fan current signals, and after AD conversion or fan voltage signals are obtained and an average value A is obtained2Then A is added2Writing into the memory of the host controller.
In order to ensure the accuracy and stability of the measured values in the factory testing process, the running time T is required after the range hood is switched every time1Running time T1The value range of (1.5 s) is less than or equal to T1Less than or equal to 2 s; in practice, it is prepared byImproved accuracy and reliability of calculated values, T1It may take 2s and for mains at a frequency of 50HZ, 100 cycles may be sampled and then averaged.
On the basis of the existing common wind pressure detection circuit, the automatic speed regulation of the range hood is directly realized by adopting a software mode, a full-wave rectifier bridge and a sliding rheostat do not need to be additionally arranged, the production procedures are reduced, the production cost is reduced, and the control mode is simpler and more direct.
In the prior art, a test circuit adopting a sliding rheostat scheme needs to be adjusted through the sliding rheostat to obtain a fixed gear shifting value for software control, due to the consistency problem of an alternating current motor and a current transformer, the fixed parameter mode of the sliding rheostat can cause different conditions detected by different machines, under the condition that an actual flue is unblocked, the detection result of some equipment is unblocked, and the detection result of some equipment is blocked, so that the inaccuracy of the detection result is finally caused, and the user experience is poor;
by adopting the software control mode of the embodiment, when the range hood starts the automatic speed regulation method, if the smoke channel is detected to be blocked (namely the voltage of the fan is reduced), the range hood starts high-grade; if the smoke channel is not blocked (namely the voltage of the fan is larger), the range hood is started to be in a low gear, the range hood can switch the high gear and the low gear according to the actual situation whether the smoke channel is unobstructed, the consistency of the detection result is good, the control is stable and reliable, and the product performance is good.
Claims (6)
1. An automatic speed regulating method of a range hood is characterized by comprising the following steps:
(1) starting a program, and detecting the current value of a fan of the range hood in real time;
(2) the range hood runs at a low gear and has a running time TkeepThen, the next step is carried out;
(3) the main controller collects the current value of the fan detected in real time, obtains the average value of the voltage of the fan as B after AD signal conversion, and judges whether B is more than or equal to a set value lambda1A1If the number of the first and second groups is greater than the maximum number of the first and second groups,returning to the step (2), if not, continuing the next step; wherein λ is1The proportionality coefficient set for low-gear operation of the range hood, A1The average value of the fan voltage is the average value of the fan voltage when the range hood runs at a low gear under the condition of smooth flue;
(4) the range hood is switched to high-grade operation, and the operation time TkeepThen, the next step is carried out;
(5) the main controller collects the current value of the fan detected in real time, obtains the average value of the voltage of the fan as B after AD signal conversion, and judges whether B is more than or equal to a set value lambda2A2If yes, returning to the step (2), and if not, returning to the step (4); wherein λ is2The proportionality coefficient set for high-grade operation of the range hood, A2The average value of the fan voltage of the range hood in high-grade operation is the average value of the fan voltage in the state of unobstructed flue.
2. The automatic speed regulating method of the range hood according to claim 1, characterized in that: the average value A of the fan voltage1Obtained by the following method: the range hood is placed in a state that a flue is unobstructed, the range hood is switched to a low gear, and the running time T is1After the range hood operates stably, the main controller collects a fan current signal and obtains a fan voltage average value A after AD conversion1And A is1Writing into the memory of the host controller.
3. The automatic speed regulating method of the range hood according to claim 1, characterized in that: the average value A of the fan voltage2Obtained by the following method: the range hood is placed in a state that a flue is unobstructed, the range hood is switched to a high grade, and the running time is T1After the range hood operates stably, the main controller collects a fan current signal and obtains a fan voltage average value A after AD conversion2And A is2Writing into the memory of the host controller.
4. The automatic speed regulating method of the range hood according to claim 1, characterized in that: said ratioCoefficient of example λ1、λ2Has a value range of 0.75 to lambda1＝λ2≤0.85。
5. The automatic speed regulating method of the range hood according to claim 1, characterized in that: the running time TkeepHas a value range of T being not more than 4skeep≤6s。
6. The automatic speed regulating method of the range hood according to claim 2 or 3, characterized in that: the running time T1The value range of (1.5 s) is less than or equal to T1≤2s。
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| CN201910371738.1A CN111895465A (en) | 2019-05-06 | 2019-05-06 | Automatic speed regulation method for range hood |
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| CN201910371738.1A CN111895465A (en) | 2019-05-06 | 2019-05-06 | Automatic speed regulation method for range hood |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114234249A (en) * | 2021-12-17 | 2022-03-25 | 杭州老板电器股份有限公司 | Control method and device for recognizing flue state |
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| CN114234249A (en) * | 2021-12-17 | 2022-03-25 | 杭州老板电器股份有限公司 | Control method and device for recognizing flue state |
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Application publication date: 20201106 |