CN111623387B - Electric valve flow self-adaptive control method of range hood - Google Patents
Electric valve flow self-adaptive control method of range hood Download PDFInfo
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- CN111623387B CN111623387B CN201910150955.8A CN201910150955A CN111623387B CN 111623387 B CN111623387 B CN 111623387B CN 201910150955 A CN201910150955 A CN 201910150955A CN 111623387 B CN111623387 B CN 111623387B
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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 self-adaptive control method for the flow of the electric valve of the range hood comprises the range hoods arranged on different floors, the air outlet of each range hood is communicated with a common flue through a smoke pipe, and the electric valve with a flow detection module and a power detection socket is arranged in each smoke pipe. The invention has the advantages that: according to the preset angle control method of the flue check valve of the high-rise building, the absolute input power of the closed state of the valve body is used as the basis of gear judgment, and then the flow rate and the power are respectively used for calculation and feedback according to the power limitation subsection, so that the self-adaptive adjustment of the opening of the valve plate is realized, the valve plate angle does not need to be preset, the power and the flow rate are adopted for automatic subsection calculation, and the control precision is higher.
Description
Technical Field
The invention relates to a flow self-adaptive control method, in particular to a flow self-adaptive control method for an electric valve of a range hood.
Background
At present, floors of newly-built floors in cities are generally higher and higher, and the outlet of a high-rise common flue is generally arranged at the top of the floors, so that the outlet resistance of a system can be influenced by the switching condition of a range hood of each user, and the smoke exhaust condition of users at the bottom is severe. In recent years, a user side angle-adjustable valve is combined with a roof flue outlet main fan to intensively filter and discharge, and the roof main fan is applied to some finish-finished buildings in recent years, the roof main fan performs frequency conversion and valve plate preset angle to achieve flow distribution for users with different opening rates, although the method can solve the problem of bad smoke exhaust of the users at the bottom to a certain extent, and effectively controls the flow rate and noise of the whole flue system, the method needs to adjust and adapt according to different building flues, the same program cannot self-adapt to a plurality of buildings, the calculated amount before installation is extremely large, the test fluctuation of a flow rate sensor or a pressure sensor is large in the high-resistance and low-flow state, and data cannot be directly applied and judged.
Tests show that the velocity distribution of the front flow field and the rear flow field of the valve plate under the state of small angle and high resistance is extremely uneven according to the CFD analysis and comparison of the opening state of the valve plate, and the actual flow cannot be accurately represented if the flow obtained by single-point measurement or measurement of a few points by using a differential pressure or flow velocity sensor and then multiplying the average value by a correction coefficient. In addition, the electric valve body is used as an external accessory matched with the range hood, no communication exists between the electric valve body and the range hood body under most conditions (only a few manufacturers have protocols to open or the valve body and the range hood manufactured by the manufacturers can communicate with each other), and the common valve body can only be opened and closed along with the opening and closing of a user, so that for the common multi-gear range hood, how to identify the current gear state of the range hood at the valve body end and judge the high, medium and low gears pressed by the user (different gears reflect the current cooking state of the user and the requirements on air volume and noise) becomes an application problem of the self-adaptive valve body.
Disclosure of Invention
The invention aims to solve the technical problem of providing an electric valve flow self-adaptive control method of a range hood, which can self-adaptively adjust the angle of a valve plate according to the installation position and has higher control precision, aiming at the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the self-adaptive control method for the flow of the electric valve of the range hood comprises the range hoods which are arranged on different floors, the air outlet of each range hood is communicated with a common flue through a respective smoke pipe, and the electric valve with a flow detection module and a power detection socket is arranged in each smoke pipe, and is characterized by comprising the following steps:
firstly, the power detection socket detects that the power of the range hood is increased and immediately wakes up;
keeping a valve plate of the electric valve closed t 1;
thirdly, the power detection socket detects the current power or current, and the current gear of the range hood is judged by the power of the valve plate which is completely closed;
fourthly, acquiring a target flow and a preset angle of a current gear valve plate;
driving the valve plate to move to a target angle;
sixthly, detecting the current or power and calculating the current power Pm;
judging whether the power has mutation or not, and determining gear information according to a mutation value;
judging whether the current power Pm is smaller than a limit Pi of the current gear;
if Pm is less than Pi, judging that the gear working condition is high resistance, judging whether the current gear is the maximum, if the gear is the maximum, reducing the target flow of the system, if the gear is not the maximum, judging whether the opening of a current valve plate is in the maximum, if the opening of the valve plate is the maximum, reducing the target flow, if the opening of the valve plate is not the maximum, carrying out Pm/Pi ratio segmentation judgment, increasing different valve plate openings, driving to corresponding openings, and waiting for re-judgment;
if Pm is larger than or equal to Pi, acquiring flow speed or pressure detection, and calculating the current flow;
ninthly, judging whether the current flow Qm is in a target range [ Qx, Qd ];
if the current angle is within the target range, continuously monitoring the state, S +1, if S is larger than or equal to S1, writing the current angle into a memory to update the preset angle, resetting S, if S is smaller than S1, continuously detecting, wherein S is a counter variable, S1 is a threshold value of the counter, and S +1 represents that the counter increases the count once and re-assigns the increased value to the counter variable;
if the current flow Qm is not in the target range, judging whether the current flow Qm is larger or smaller, and calculating the ratio of the current flow Qm to the lower limit Qx or the upper limit Qd of the target flow;
dividing according to the corresponding proportional limit value, and determining that a valve plate of the electric valve is correspondingly adjusted to be larger or smaller by an angle theta, an angle 2 theta and an angle 3 theta;
The flow detection module can adopt a plurality of different detection modules, and preferably, the flow detection module is a pressure detection module or a flow velocity detection module.
Preferably, an outdoor main unit is installed at an outlet of the common flue.
Preferably, in the step (iv), the target flow and the preset angle of the current gear valve plate are obtained from a storage unit of the current range hood or from an outdoor host. Therefore, both topological structures can be provided, and the current range hood can be used as a host machine, and an outdoor host machine can also be used as a host machine.
Further preferably, if the current gear is judged to be the maximum in the step ((b)), the target flow of the system is reduced by feeding back to the outdoor main machine, and if the valve sheet opening is the maximum, the target flow is reduced by feeding back to the outdoor main machine.
In order to smoothly adjust the opening and closing angle of the check valve plate, a valve plate control motor for adjusting the opening angle of the check valve plate is installed on the smoke pipe.
The common flue can adopt different forms, and preferably, the common flue is a straight cylinder flue or a step flue.
Compared with the prior art, the invention has the advantages that: according to the preset angle control method of the flue check valve of the high-rise building, the absolute input power of the closed state of the valve body is used as the basis of gear judgment, and then the flow rate and the power are respectively used for calculation and feedback according to the power limitation subsection, so that the self-adaptive adjustment of the opening of the valve plate is realized, the valve plate angle does not need to be preset, the power and the flow rate are adopted for automatic subsection calculation, and the control precision is higher.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an indoor range hood according to an embodiment of the present invention;
fig. 3 is a flow chart of an adaptive control method for electric valve flow rate according to an embodiment of the present invention;
FIG. 4 is a graph of power versus flow for an embodiment of the present invention;
FIG. 5 is a pressure-flow graph of an embodiment of the present invention;
FIG. 6 is a control logic diagram of valve plate adjustment according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a topology according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of another topology of an embodiment of the present invention;
FIG. 9 is a schematic view of another stack configuration 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 and fig. 2, the flue system of the high-rise building of the present embodiment includes range hoods 1 installed on different floors, an air outlet of each range hood 1 is communicated with a common flue 3 through a respective smoke tube 2, an outlet of the smoke tube 2 is installed with a fire damper 9, and the common flue 3 can be a straight flue (as shown in fig. 1) or a stepped flue (as shown in fig. 9). Each smoke tube 2 is internally provided with an electric valve 4, the smoke tube 2 is provided with a valve plate control motor 7 for adjusting the opening angle of the check valve plate 41, the electric valve 4 is provided with a flow detection module 5 and a power detection socket (shown in the figure), the power detection socket can be used for detecting the total power of the range hood of any brand, and the flow detection module 5 can adopt a pressure detection module or a flow velocity detection module. An outdoor main machine 6 is installed at the outlet of the common flue 3, and a purification device 8 is installed at the front end of the outdoor main machine.
As shown in fig. 3, the method for adaptively controlling the flow rate of the electrically operated valve of the range hood in the embodiment is a networking operation mode, and specifically includes the following steps:
firstly, the power detection socket detects that the power of the range hood is increased and immediately wakes up;
secondly, keeping the valve plate of the electric valve closed t 1;
thirdly, the power detection socket detects the current power or current, and the current gear of the range hood is judged by the power of the valve plate which is completely closed;
fourthly, acquiring a target flow and a preset angle of a current gear valve plate;
driving the valve plate to move to a target angle;
sixthly, detecting the current or power and calculating the current power Pm;
judging whether the power has mutation or not, and determining gear information according to a mutation value;
judging whether the current power Pm is smaller than a limit Pi of the current gear;
if Pm is less than Pi, judging that the gear working condition is high resistance, judging whether the current gear is the maximum, if the gear is the maximum, reducing the target flow of the system, if the gear is not the maximum, judging whether the opening of a current valve plate is in the maximum, if the opening of the valve plate is the maximum, reducing the target flow, if the opening of the valve plate is not the maximum, carrying out Pm/Pi ratio segmentation judgment, increasing different valve plate openings, driving to corresponding openings, and waiting for re-judgment;
if Pm is larger than or equal to Pi, acquiring flow speed or pressure detection, and calculating the current flow;
ninthly, judging whether the current flow Qm is in a target range [ Qx, Qd ];
if the current angle is within the target range, continuously monitoring the state, S +1, if S is larger than or equal to S1, writing the current angle into a memory to update the preset angle, resetting S, if S is smaller than S1, continuously detecting, wherein S is a counter variable, S1 is a threshold value of the counter, and S +1 represents that the counter increases the count once and re-assigns the increased value to the counter variable;
if the current flow Qm is not in the target range, judging whether the current flow Qm is larger or smaller, and calculating the ratio of the current flow Qm to the lower limit Qx or the upper limit Qd of the target flow;
dividing according to the corresponding proportional limit value, and determining that a valve plate of the electric valve is correspondingly adjusted to be larger or smaller by an angle theta, an angle 2 theta and an angle 3 theta;
In the step (iv), the target flow and the preset angle of the current gear valve plate are obtained from the storage unit of the current range hood 1 or the outdoor host 6. And if the current gear is judged to be the maximum, feeding back to the outdoor host 6 to reduce the target flow of the system, and if the valve sheet opening is the maximum, feeding back to the outdoor host 6 to reduce the target flow.
In step ninthly, the state monitoring S and the updating of the preset angle are explained as follows: when a large amount of time fractions are all used at the same angle in one use process of a user, the angle of the main time fraction (for example, more than 80% of the time) can be used as a potential preset value, and the system records the angle by using a variable S +1 (the initial value of the variable S is 0). If the angle is often used as the main angle (for example, the time percentage exceeds 80%) within one week or one month, the state threshold variable is set to be S1, and when the recent S ≧ S1, the system determines that the angle is more suitable for the user to use, and can be used as the preset value.
Examples are: taking the 15/33 th floor as an example, the on-off state change or the flow change of other floors can influence the flue resistance, and then influence the outlet flow of the current (15) th floor, if the initial angle is 40 degrees, the time of stabilizing to exceed 80% in the target flow range in the system working process is all located at the angle of 55 degrees, then S +1, and the time of stabilizing to exceed 80% in the target flow range in the system working process is all located at the angle of 55 degrees in the repeated 10 times of cooking process in a week. And S1 is 10 (state threshold 10 times), it is determined that S10 ≧ S1, and the preset angle is updated to 55 °. Because the user uses the 55 ° threshold value for comparison and adaptation, the user can basically adjust the angle or adjust the angle for several times in the whole cooking process of using the range hood. Can reduce the fluctuation of amount of wind and the fluctuation of noise, and then promote and use experience, it is just stable to avoid starting at every turn all need adjust repeatedly.
As shown in fig. 4 and 5, the power and the actual flow are monotone increasing functions (non-linearity), and it is not necessary to specifically calculate the functional relationship, but only the monotonicity is combined with the power detection function of the electric valve (the range hood socket is inserted into a wall power supply port through the power detection socket of the electric valve, the electric valve is firstly closed during installation and debugging, and the power values of different gears of the range hood are respectively recorded, because the fluctuation of the inlet and the outlet of the range hood is very small under the condition of full closing, the power value directly feeds back the strength of the current gear, the range hood socket can be used for judging the gear value at the later stage, the W-Q curve fitted by power interpolation under the condition of small opening or high resistance and small flow can feed back the flow along with the change of the power, and the state is more accurate compared with the state of the flow rate sensor.
Fig. 6 is a control flow chart of the indoor unit fan, which transmits a signal detected by the flow or pressure detection module to the data analysis unit, and the data analysis unit drives the motor through the motor driving module to adjust the rotation speed of the fan.
As shown in fig. 7, the host is an outdoor host 6, and the indoor unit, i.e., the range hood 1, is in communication with the outdoor host through the wireless module. The wireless module can adopt LoRa or NB-loT or wifi module.
As shown in fig. 8, the host is one of the turned-on indoor units, i.e., the range hood 1.
Claims (7)
1. The self-adaptive control method for the flow of the electric valve of the range hood comprises the range hoods (1) installed on different floors, the air outlet of each range hood (1) is communicated with a common flue (3) through a respective smoke tube (2), and the electric valve (4) with a flow detection module (5) and a power detection socket is installed in each smoke tube (2), and is characterized by comprising the following steps:
firstly, the power detection socket detects that the power of the range hood is increased and immediately wakes up;
keeping a valve plate of the electric valve closed t 1;
thirdly, the power detection socket detects the current power or current, and the current gear of the range hood is judged by the power of the valve plate which is completely closed;
fourthly, acquiring a target flow and a preset angle of a current gear valve plate;
driving the valve plate to move to a target angle;
sixthly, detecting the current or power and calculating the current power Pm;
judging whether the power has mutation or not, and determining gear information according to a mutation value;
judging whether the current power Pm is smaller than a limit Pi of the current gear;
if Pm is less than Pi, judging that the gear working condition is high resistance, judging whether the current gear is the maximum, if the gear is the maximum, reducing the target flow of the system, if the gear is not the maximum, judging whether the opening of a current valve plate is in the maximum, if the opening of the valve plate is the maximum, reducing the target flow, if the opening of the valve plate is not the maximum, carrying out Pm/Pi ratio segmentation judgment, increasing different valve plate openings, driving to corresponding openings, and waiting for re-judgment;
if Pm is larger than or equal to Pi, acquiring flow speed or pressure detection, and calculating the current flow;
ninthly, judging whether the current flow Qm is in a target range [ Qx, Qd ];
if the valve plate flow rate is within the target range, the state is continuously monitored, the number of times that the valve plate reaches a certain angle after the valve plate flow rate is achieved within a certain period is counted by using a counter variable S, if the S is larger than or equal to S1, the current angle is written into a storage and updated to a preset angle, the S is cleared, if the S is smaller than S1, the detection is continuously carried out, and S1 is the threshold value of the counter;
if the current flow Qm is not in the target range, judging whether the current flow Qm is larger or smaller, and calculating the ratio of the current flow Qm to the lower limit Qx or the upper limit Qd of the target flow;
dividing according to the corresponding proportional limit value, and determining that a valve plate of the electric valve is correspondingly adjusted to be larger or smaller by an angle theta, an angle 2 theta and an angle 3 theta;
2. The self-adaptive control method for the electric valve flow of the range hood according to claim 1, characterized in that: the flow detection module (5) is a pressure detection module or a flow velocity detection module.
3. The self-adaptive control method for the electric valve flow of the range hood according to claim 1, characterized in that: an outdoor main machine (6) is arranged at the outlet of the common flue (3).
4. The self-adaptive control method for the electric valve flow of the range hood according to claim 3, characterized in that: and in the step IV, the target flow and the preset angle of the current gear valve plate are obtained from the storage unit of the current range hood (1) or the outdoor host (6).
5. The self-adaptive control method for the electric valve flow of the range hood according to claim 3, characterized in that: and if the current gear is judged to be the maximum in the step II, feeding back to the outdoor host (6) to reduce the target flow of the system, and if the valve sheet opening is the maximum, feeding back to the outdoor host (6) to reduce the target flow.
6. The self-adaptive control method for the electric valve flow of the range hood according to claim 1, characterized in that: and a valve plate control motor (7) for adjusting the opening angle of the check valve plate (41) is arranged on the smoke pipe (2).
7. The self-adaptive control method for the electric valve flow of the range hood according to any one of claims 1 to 6, characterized in that: the common flue (3) is a straight cylinder flue or a stepped flue.
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| CN201910150955.8A CN111623387B (en) | 2019-02-28 | 2019-02-28 | Electric valve flow self-adaptive control method of range hood |
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| CN201910150955.8A CN111623387B (en) | 2019-02-28 | 2019-02-28 | Electric valve flow self-adaptive control method of range hood |
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Families Citing this family (2)
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| CN114183785B (en) * | 2021-10-27 | 2022-12-20 | 宁波方太厨具有限公司 | Operation control method of compatible building centralized smoke exhaust system |
| CN116147040B (en) * | 2023-04-17 | 2023-07-21 | 杭州老板电器股份有限公司 | Air valve control method and system of variable-frequency range hood |
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