CN114440284B - Central range hood system and control method and control device thereof - Google Patents
Central range hood system and control method and control device thereof Download PDFInfo
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- CN114440284B CN114440284B CN202210275954.8A CN202210275954A CN114440284B CN 114440284 B CN114440284 B CN 114440284B CN 202210275954 A CN202210275954 A CN 202210275954A CN 114440284 B CN114440284 B CN 114440284B
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000001133 acceleration Effects 0.000 claims description 23
- 238000006073 displacement reaction Methods 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000006233 lamp black Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The embodiment of the invention discloses a central range hood system, a control method and a control device thereof, wherein the control method comprises the following steps: acquiring a load current of a terminal machine and a vibration signal set of a box body of a fan; the set of vibration signals includes at least one type of vibration signal; if the load current is greater than or equal to a preset current threshold value and the vibration value of the vibration signal set is greater than or equal to a preset vibration threshold value, the fan of the terminal machine is judged to be started. The technical scheme of the embodiment of the invention can realize the accurate linkage of the power distribution valve and the terminal machine and accurately judge the on-off state of the fan in the terminal machine.
Description
Technical Field
The embodiment of the invention relates to the technical field of kitchen electricity, in particular to a central range hood system and a control method and a control device thereof.
Background
The central range hood system comprises a main machine, a terminal machine and a power distribution valve. The main machine is equipment which is arranged at the outlet of a public flue of a residential roof, forcibly discharges fume in the public flue and internally comprises a fan; the terminal machine is an exhaust device such as a range hood or an integrated kitchen; the power distribution valve is a device which is arranged between the outlet of the exhaust pipe of the terminal machine and the inlet of the public flue and is used for adjusting the exhaust amount of the terminal machine. The terminal, the power distribution valve and the host communicate by wire or wirelessly.
The central range hood system is designed for solving the problem of unsmooth smoke discharge of a public smoke discharge channel of a high-rise residence, and the starting-up quantity of the terminal is an important basis for judging the power demand of the central range hood system, so that the starting-up signal of the terminal is accurately identified, and the accurate control of the system is particularly important.
In the prior art, the on-off state of the terminal is judged by detecting the load current of the terminal, but along with the development of the terminal, such as the popularization of a variable frequency range hood, the current of a fan of the terminal is smaller when the fan runs at a low speed, and the power of a part of brands of terminals is close to the illumination power when the fan runs at a low speed, so that the on-off state of the fan in the terminal is judged only according to the load current, the starting number of the terminal cannot be accurately judged, and the requirement of an accurate control system cannot be met.
Disclosure of Invention
The embodiment of the invention provides a central range hood system, a control method and a control device thereof, which are used for realizing accurate linkage of a power distribution valve and a terminal machine and accurately judging the on-off state of a fan in the terminal machine.
In a first aspect, an embodiment of the present invention provides a control method of a central range hood system, including:
Acquiring a load current of a terminal machine and a vibration signal set of a box body of a fan; the set of vibration signals includes at least one type of vibration signal;
If the load current is greater than or equal to a preset current threshold value and the vibration value of the vibration signal set is greater than or equal to a preset vibration threshold value, the fan of the terminal machine is judged to be started.
Optionally, before acquiring the load current of the terminal and the vibration signal set of the fan box, the control method further includes:
acquiring all vibration frequencies of a fan box body, and determining a main vibration frequency range according to the vibration frequencies;
Determining a vibration signal set to be acquired according to a corresponding relation between a preset frequency range and a vibration signal type and a frequency range corresponding to a main vibration frequency range; the type of vibration signal within the set of vibration signals includes one of a vibration velocity, a vibration displacement, or a vibration acceleration.
Optionally, before acquiring the load current of the terminal and the vibration signal set of the fan box, the control method further includes:
Acquiring all vibration frequencies of a fan box body, and determining a frequency range to which each vibration frequency belongs;
Determining a vibration signal set to be acquired according to a corresponding relation between a preset frequency range and a vibration signal type and a frequency range to which each vibration frequency belongs; the type of the vibration signals in the vibration signal set comprises at least two of vibration displacement, vibration speed and vibration acceleration;
calculating the proportion relation of vibration frequencies in different frequency ranges, and determining the weights of various types of vibration signals to be acquired according to the proportion relation;
after obtaining the load current of the terminal and the vibration signal set of the fan box, the control method further comprises the following steps:
And weighting and summing the vibration values of the vibration signals of each type according to the weight of the vibration signals of each type, and determining the summation result as the vibration value of the vibration signal set.
Optionally, after determining that the fan of the terminal is turned on, the control method further includes:
Generating a starting signal and sending the starting signal to a host;
and receiving valve opening angle information fed back by the host, and adjusting the valve opening angle of the valve plate according to the valve opening angle information.
Optionally, the control method further includes:
if the load current is zero, judging that a fan of the terminal machine is closed; or alternatively
And if the load current is smaller than a preset current threshold value and/or the vibration value of the vibration signal set is smaller than the preset vibration threshold value, judging that the fan of the terminal machine is closed.
Optionally, after determining that the fan of the terminal is turned off, the control method further includes:
Generating a shutdown signal and sending the shutdown signal to a host;
and receiving a valve closing instruction fed back by the host, and controlling the valve plate to be closed according to the valve closing instruction.
In a second aspect, an embodiment of the present invention further provides a control device of a central range hood system, including:
the information acquisition module is used for acquiring load current of the terminal machine and a vibration signal set of the box body of the fan; the set of vibration signals includes at least one type of vibration signal;
The state judging module is used for judging that the fan of the terminal machine is started when the load current is greater than or equal to a preset current threshold value and the vibration value of the vibration signal set is greater than or equal to a preset vibration threshold value.
Optionally, the control device further includes:
the state reporting module is used for generating a starting signal after judging that the fan of the terminal machine is started and sending the starting signal to the host machine;
The valve opening angle adjusting module is used for receiving valve opening angle information fed back by the host machine and adjusting the valve opening angle of the valve plate according to the valve opening angle information.
In a third aspect, an embodiment of the present invention further provides a central range hood system, including: a plurality of terminals, a plurality of vibration sensors, and a plurality of power distribution valves;
The terminal machine, the power distribution valve and the vibration sensor are arranged in one-to-one correspondence, and the power distribution valve is electrically connected with the vibration sensor and the terminal machine respectively; the power distribution valve is used for detecting the load current of the terminal; the vibration sensor is used for detecting a vibration signal set of a fan box body of the terminal machine and sending the vibration signal set to the power distribution valve; the set of vibration signals includes at least one type of vibration signal;
the power distribution valve comprises a processor and a memory; the memory stores one or more programs that, when executed by the processor, cause the processor to implement the method of controlling a central range hood system provided in the first aspect.
Optionally, the central range hood system further comprises a main machine, and the main machine is in communication connection with the power distribution valve.
According to the control method of the central range hood system, provided by the embodiment of the invention, the fan of the terminal is judged to be started when the load current of the terminal is greater than or equal to the preset current threshold and the vibration value of the vibration signal set is greater than or equal to the preset vibration threshold by acquiring the vibration signal set of the fan box of the terminal, the vibration value generated by the fan box when the fan operates can be utilized, meanwhile, the on-off state of the fan in the terminal is judged by combining the load current of the terminal, the external environment interference and the current interference of the terminal when the terminal is not in operation are avoided, and the fan start of the terminal (namely the smoke discharging function of the terminal is started) is accurately identified.
Drawings
Fig. 1 is a schematic flow chart of a control method of a central range hood system according to an embodiment of the present invention;
fig. 2 is a flow chart of another control method of a central range hood system according to an embodiment of the present invention;
fig. 3 is a flow chart of another control method of a central range hood system according to an embodiment of the present invention;
Fig. 4 is a flow chart of another control method of a central range hood system according to an embodiment of the present invention;
Fig. 5 is a specific flowchart of a control method of a central range hood system according to an embodiment of the present invention;
Fig. 6 is a schematic structural diagram of a control device of a central range hood system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a central range hood system according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another central range hood system according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic flow chart of a control method of a central range hood system according to an embodiment of the present invention, where the method is applied to a power distribution valve to determine whether a fan of a terminal is turned on, and may be executed by a processor inside the power distribution valve. As shown in fig. 1, the control method may include the steps of:
s101, acquiring a load current of the terminal and a vibration signal set of a box body of the fan.
The terminal may be a smoke exhaust device such as a range hood or an integrated kitchen range, and the following description will take the range hood as an example. The load current of the terminal can be detected by the power distribution valve.
Wherein the set of vibration signals comprises at least one type of vibration signal. By way of example, the types of vibration signals may include vibration displacement, vibration velocity, vibration acceleration, and the like. Vibration signals can be acquired through the vibration sensor and sent to the power distribution valve to be used as one of the bases for judging whether the fan of the terminal machine is started or not.
When the range hood runs in different gears, the fan box of the range hood can generate vibration energy of different degrees, the vibration value of any type of vibration signal can be used for representing the vibration energy of the fan box, the vibration signal set of the fan box is obtained and used as one of the basis for judging whether the fan of the terminal machine is started or not, the accuracy of a judging result can be improved, and the specific judging condition for starting the fan is shown in S102.
S102, if the load current is greater than or equal to a preset current threshold value and the vibration value of the vibration signal set is greater than or equal to a preset vibration threshold value, judging that a fan of the terminal machine is started.
The preset current threshold and the preset vibration threshold can be determined according to experience or actual working parameters of the terminal. The fan of the range hood can operate in different gears, the working current and the vibration value of the range hood in the lowest gear can be predetermined, the working current is used as a preset current threshold, and the vibration value is used as a preset vibration threshold.
The vibration value of the vibration signal set can be vibration energy obtained by converting the vibration signals in the vibration signal set, and correspondingly, the preset vibration threshold can be the vibration energy under the lowest gear, so that no matter what type of vibration signals are collected, the preset vibration threshold is not required to be adjusted, and the complexity of the control method can be simplified. Of course, when the vibration signal set includes only one type of vibration signal, the vibration value of the vibration signal may be understood as the amplitude of the vibration signal, and the preset vibration threshold may be adaptively preset by using the same type of vibration signal, without performing conversion.
Further, when the load current is detected to be greater than or equal to the preset current threshold value and the vibration value of the vibration signal set is detected to be greater than or equal to the preset vibration threshold value, the fan is indicated to run at least in the lowest gear, and the fan of the terminal machine can be judged to be started. The embodiment of the invention adopts the dual judgment basis of the load current and the vibration signal set, thereby avoiding the interference caused by the current generated by other loads similar to the working current of the fan, avoiding the misjudgment caused by the vibration of the fan box body due to the interference of the external environment and ensuring the accuracy of the judgment result.
According to the control method of the central range hood system, provided by the embodiment of the invention, the fan of the terminal is judged to be started when the load current of the terminal is greater than or equal to the preset current threshold and the vibration value of the vibration signal set is greater than or equal to the preset vibration threshold by acquiring the vibration signal set of the fan box of the terminal, the vibration value generated by the fan box when the fan operates can be utilized, meanwhile, the on-off state of the fan in the terminal is judged by combining the load current of the terminal, the external environment interference and the current interference of the terminal when the terminal is not in operation are avoided, and the fan start of the terminal (namely the smoke discharging function of the terminal is started) is accurately identified.
Fig. 2 is a flow chart of another control method of a central range hood system according to an embodiment of the present invention, and on the basis of the above embodiment, a supplementary explanation is made on a determination manner of vibration signals concentrated in vibration signals. As shown in fig. 2, in this embodiment, the control method may include the following steps:
S201, acquiring all vibration frequencies of a fan box body, and determining a main vibration frequency range according to the vibration frequencies.
The fan vibrates the fan housing during operation, the vibration of which has a plurality of different vibration frequencies. Further, the plurality of vibration frequencies of the fan box body are distributed in different frequency ranges, and by determining in which frequency range the vibration frequency is concentrated, which frequency range can be used as the main vibration frequency range. By way of example, the frequency range may be divided into a low frequency range (e.g., 0-500 Hz), a medium frequency range (e.g., 500-2000 Hz), and a high frequency range (e.g., a frequency range above 2000 Hz). For example, the power distribution valve may acquire the vibration frequency of the fan case through a vibration sensor.
S202, determining a vibration signal set to be acquired according to a corresponding relation between a preset frequency range and the vibration signal type and a frequency range corresponding to the main vibration frequency range.
In the present embodiment, the type of the vibration signal in the vibration signal set includes one of a vibration speed, a vibration displacement, or a vibration acceleration. Specifically, the vibration speed, the vibration displacement and the vibration acceleration can be used for representing the vibration energy, and one of the vibration speeds, the vibration displacement and the vibration acceleration is used as a vibration signal concentrated by the vibration signal.
Further, the research finds that when the object vibrates at low frequency, the vibration displacement is adopted to represent the vibration energy more accurately, when the object vibrates at medium frequency, the vibration speed is adopted to represent the vibration energy more accurately, and when the object vibrates at high frequency, the vibration acceleration is adopted to represent the vibration energy more accurately. Accordingly, the correspondence between the above frequency range and the vibration signal type may be: the vibration signal type corresponding to the low frequency range is vibration displacement, the vibration signal type corresponding to the medium frequency range is vibration speed, and the vibration signal type corresponding to the high frequency range is vibration acceleration.
Specifically, if the main vibration frequency range corresponds to which frequency range, the type of the vibration signal corresponding to the frequency range is the type of the vibration signal in the vibration signal set to be acquired, and when the vibration signal set is acquired subsequently, the vibration signal of the type is acquired. For example, if the vibration signal of the fan case is concentrated in the intermediate frequency range, that is, the main vibration frequency corresponds to the intermediate frequency range, the vibration signal concentrated by the vibration signal to be obtained is the vibration speed, and the vibration speed of the fan case may be used as one of the bases for judging whether the fan is turned on.
S203, acquiring a load current of the terminal and a vibration signal set of a box body of the fan.
As described above, in the present embodiment, the vibration signal concentrated in the vibration signal is one of the vibration displacement, the vibration speed, and the vibration acceleration, and specifically may be determined according to the type of the vibration signal corresponding to the main vibration frequency of the fan case.
S204, if the load current is greater than or equal to a preset current threshold value and the vibration value of the vibration signal set is greater than or equal to a preset vibration threshold value, judging that a fan of the terminal machine is started.
According to the embodiment, the main vibration frequency range of the fan box body is determined in advance, and the type of vibration signals in the vibration signal set to be acquired is determined according to the type of the vibration signals corresponding to the main vibration frequency range, so that only the vibration signals of the type can be acquired when the vibration signal set is acquired. Because the vibration frequency of the fan box body is mainly concentrated in the main vibration frequency range, the vibration signals corresponding to the main vibration frequency range are obtained as judgment basis, on one hand, the accuracy of judgment results can be ensured, on the other hand, the types of the obtained vibration signals can be reduced, the design difficulty and the number of the vibration sensors are simplified, and the cost is reduced.
Fig. 3 is a flowchart of another control method of a central range hood system according to an embodiment of the present invention, which provides another method for determining a vibration signal concentrated to a vibration signal. As shown in fig. 3, in this embodiment, the control method specifically includes the following steps:
S301, acquiring all vibration frequencies of a fan box body, and determining a frequency range to which each vibration frequency belongs.
As described above, the fan vibrates the fan case during operation, the vibration of which has a plurality of different vibration frequencies, and the plurality of vibration frequencies of the fan case are distributed in different frequency ranges. In this embodiment, the frequency ranges may include a low frequency range, a medium frequency range and a high frequency range, among all the vibration frequencies of the fan box, there may be a vibration frequency belonging to the low frequency range, there may also be a vibration frequency belonging to the medium frequency range, there may also be a vibration frequency belonging to the high frequency range, after all the vibration frequencies of the fan box are collected, the frequency range to which each vibration frequency belongs may be determined, and then, according to the correspondence between the frequency range and the vibration signal type, the type of the vibration signal in which the vibration signal to be obtained is concentrated is determined, see in detail S302.
S302, determining a vibration signal set to be acquired according to a corresponding relation between a preset frequency range and the vibration signal type and a frequency range to which each vibration frequency belongs.
In this embodiment, the type of the vibration signal corresponding to the low frequency range is the vibration displacement, the type of the vibration signal corresponding to the intermediate frequency range is the vibration velocity, and the type of the vibration signal corresponding to the high frequency range is the vibration acceleration. In general, the vibration of the fan housing has at least two of a low-frequency vibration frequency, an intermediate-frequency vibration frequency, and a high-frequency vibration frequency, and therefore, in this embodiment, the types of the vibration signals in the vibration signal set include at least two of a vibration displacement, a vibration velocity, and a vibration acceleration. Specifically, after a frequency range to which the vibration frequency of the fan box belongs is determined, the type of the vibration signal to be acquired can be determined according to the type of the vibration signal corresponding to the frequency range.
For example, if all vibration frequencies of the fan case are respectively classified into a low frequency range and an intermediate frequency range, the type of the vibration signal concentrated vibration signal to be obtained includes vibration displacement and vibration speed; if all vibration frequencies of the fan box body are respectively classified into a high frequency range and a medium frequency range, the type of the vibration signal concentrated vibration signal to be obtained comprises vibration acceleration and vibration speed; if all the vibration frequencies of the fan box body are respectively classified into a low frequency range, a medium frequency range and a high frequency range, the types of the vibration signals to be acquired and the vibration signals to be concentrated include vibration displacement, vibration speed and vibration acceleration.
S303, calculating the proportion relation of vibration frequencies in different frequency ranges, and determining the weights of various types of vibration signals to be acquired according to the proportion relation.
According to the above description, the vibration energy of different frequency ranges can be represented by different types of vibration signals, and when a plurality of vibration frequencies of the fan box belong to different frequency ranges, the vibration energy of the fan box can be represented by different types of vibration signals corresponding to different frequency ranges, so as to further improve the accuracy of the judgment result. For example, when vibration energy is calculated using a plurality of types of vibration signals together, the vibration values of the types of vibration signals may be weighted and summed.
Further, the above-mentioned proportional relationship may be a quantitative ratio of vibration frequencies in different frequency ranges, which may reflect a concentration degree of vibration frequencies of the fan case in each frequency range, and thus may reflect weights of vibration signal types corresponding to each frequency range when vibration energy is calculated, and weights of various types of vibration signals to be acquired may be calculated according to the proportional relationship.
For example, if 10 vibrations with different frequencies are collected in the fan box, 3 frequencies belong to a low frequency range, 6 frequencies belong to a medium frequency range, and 1 frequency belongs to a high frequency range, types of vibration signals to be obtained include vibration displacement, vibration speed and vibration acceleration, and a proportion relation of vibration frequencies in different frequency ranges is low: intermediate frequency: the high frequency is 3:6:1. Further, the weight of vibration displacement corresponding to low frequency is 3/10; the weight of the vibration speed corresponding to the intermediate frequency is 3/5; the weight of vibration acceleration corresponding to high frequency is 1/10. Subsequently, after the vibration displacement, the vibration speed and the vibration acceleration of the fan box are obtained, weighting calculation can be performed according to weights corresponding to the vibration signals, so as to obtain the vibration value of the vibration signal set, and see S305 in detail.
S304, acquiring a load current of the terminal and a vibration signal set of a box body of the fan.
S305, weighting and summing the vibration values of the vibration signals of all types according to the weight of the vibration signals of all types, and determining the summation result as the vibration value of the vibration signal set.
For example, assuming that the vibration signals in the obtained vibration signal set include vibration displacement, vibration velocity and vibration acceleration, the vibration values of the vibration signals are A, B and C in sequence, and the weights corresponding to the vibration signals are a, b and C in sequence, respectively, the vibration values q=aa+bb+cc of the vibration signal set.
S306, if the load current is greater than or equal to a preset current threshold value and the vibration value of the vibration signal set is greater than or equal to a preset vibration threshold value, judging that a fan of the terminal machine is started.
According to the embodiment of the invention, by acquiring all the vibration frequencies of the fan box and determining the frequency range to which each vibration frequency belongs, the vibration signal set to be acquired can be determined according to the corresponding relation between the preset frequency range and the vibration signal type and the frequency range to which each vibration frequency belongs, and in addition, by calculating the proportion relation of the vibration frequencies in different frequency ranges, the weight of each type of vibration signal to be obtained can be determined according to the proportion relation, and then the vibration values of each type of vibration signal can be weighted and summed according to the weight of each type of vibration signal, so that the vibration value of the vibration signal set is obtained through calculation, and the vibration energy of the fan box body can be jointly represented by combining different types of vibration signals, and the accuracy of a judgment result is further improved.
Fig. 4 is a schematic flow chart of another control method of a central range hood system according to an embodiment of the present invention, and on the basis of any of the above embodiments, a further supplementary explanation is provided for the control method after determining the on-off state of the blower. As shown in fig. 4, in this embodiment, the control method may include the following steps:
S401, acquiring a load current of the terminal and a vibration signal set of a box body of the fan.
S402, judging whether the load current is larger than or equal to a preset current threshold value and whether the vibration value of the vibration signal set is larger than or equal to the preset vibration threshold value is met, if yes, executing S403, and if not, executing S406.
Specifically, if the load current is greater than or equal to the preset current threshold and the vibration value of the vibration signal set is greater than or equal to the preset vibration threshold, S403 is executed, and it is determined that the fan of the terminal is turned on. If either one of the two is not established, that is, if the load current is smaller than the preset current threshold value and/or the vibration value of the vibration signal set is smaller than the preset vibration threshold value, S406 is executed, and it is determined that the fan of the terminal is turned off.
The above-described method of determining the fan-off of the terminal is not limited, and in other embodiments, if the load current is detected to be zero, it may be determined that the fan-off of the terminal is also performed.
S403, judging that a fan of the terminal is started, and executing S404.
S404, generating a starting signal and sending the starting signal to a host; s405 is performed.
S405, receiving valve opening angle information fed back by a host, and adjusting the valve opening angle of the valve plate according to the valve opening angle information.
Wherein the valve opening angle information indicates an opening angle of a valve plate of the power distribution valve. In general, when the surface of the valve plate is perpendicular to the flow direction of wind, the opening angle of the valve plate is 0 DEG, and the valve plate is in a valve closing state; when the surface of the valve plate is parallel to the flow direction of wind, the opening angle of the valve plate is 90 degrees, and the valve plate is in a full-open state at the moment; the magnitude of exhaust resistance can be adjusted by adjusting the valve opening angle of the valve plate.
Specifically, after the power distribution valve determines that the fan is started, a starting signal can be sent to the host, the host can determine valve opening angle information of the valve plate sent by each power distribution valve according to the current operation working condition (such as the number of terminal machines in a starting state, the air discharge quantity of each terminal machine and the like) of the central range hood system, the valve opening angle information is sent to the corresponding power distribution valve, and after the power distribution valve receives the valve opening angle information, the valve opening angle of the valve plate can be adjusted according to the valve opening angle information.
S406, judging that the fan of the terminal is closed, and executing S407.
S407, generating a shutdown signal and sending the shutdown signal to the host; s408 is performed.
S408, receiving a valve closing instruction fed back by the host, and controlling the valve plate to be closed according to the valve closing instruction.
Specifically, after receiving the valve closing instruction, the power distribution valve can control the valve opening angle of the valve plate to be 0 degrees so as to close the valve plate, prevent lampblack from flowing backwards, and reduce the energy consumption of the system.
Fig. 5 is a specific flowchart of a control method of a central range hood system according to an embodiment of the present invention, as shown in fig. 5, in an embodiment, a vibration signal concentrated by a vibration signal may be a vibration speed. Firstly, according to an actually installed range hood (terminal machine), the vibration speed V_ Low gear and the load current I_ Low gear of the range hood in low-gear operation can be calibrated in advance, the vibration speed V_ Low gear is used as a preset vibration threshold value, and the load current I_ Low gear is used as a preset current threshold value; then the power distribution valve can detect the vibration speed value V_ Real world at the top of the fan box and the load current I_ Real world of the terminal in real time, and compare the vibration speed value V_ Real world with a corresponding preset vibration threshold value (V_ Low gear ) and a corresponding preset current threshold value (I_ Low gear ) to judge whether the fan of the terminal is started or not; whether the fan is started or not, the power distribution method is used for sending a power on-off signal of the fan to the host machine of the attic, so that the host machine can determine the running frequency of the fan of the host machine according to the starting working condition of the system, and simultaneously, the valve opening angle of the power distribution method of each starting terminal machine is adjusted, thereby ensuring the efficient running of the system and ensuring the smoke discharging effect. After judging that the fan is started, the power distribution valve can firstly control the valve plate of the power distribution valve to be opened by 90 degrees so as to ensure the smoke discharging capability, and then can adjust the valve opening angle according to the valve opening angle information after receiving the valve opening angle information sent by the host.
Based on the same inventive concept, the embodiment of the present invention further provides a control device of a central range hood system, and fig. 6 is a schematic structural diagram of the control device of the central range hood system provided by the embodiment of the present invention, as shown in fig. 6, where the control device includes an information acquisition module 501 and a state determination module 502, where the information acquisition module 501 is configured to acquire a load current of a terminal and a vibration signal set of a fan box; the set of vibration signals includes at least one type of vibration signal; the state determining module 502 is configured to determine that a fan of the terminal is turned on when the load current is greater than or equal to a preset current threshold and a vibration value of the vibration signal set is greater than or equal to a preset vibration threshold.
The control device of the central range hood system provided by the embodiment of the invention can execute the control method of the central range hood system provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Based on the above embodiment, the state determining module 502 is further configured to determine that the fan of the terminal is turned off when the load current is zero, or determine that the fan of the terminal is turned off when the load current is less than a preset current threshold, and/or the vibration value of the vibration signal set is less than a preset vibration threshold.
Optionally, the control device further comprises a status reporting module and a valve opening angle adjusting module, wherein the status reporting module is used for generating a starting signal after judging that the fan of the terminal machine is started, and sending the starting signal to the host; the valve opening angle adjusting module is used for receiving valve opening angle information fed back by the host machine and adjusting the valve opening angle of the valve plate according to the valve opening angle information. In addition, the state reporting module can also be used for generating a shutdown signal after judging that the fan of the terminal machine is closed, and sending the shutdown signal to the host machine; the valve opening angle adjusting module is used for receiving a valve closing instruction fed back by the host machine and controlling the valve plate to be closed according to the valve closing instruction.
Regarding the acquisition of the vibration signal set, in a specific embodiment, the optional control device further includes a signal to be acquired determining module, configured to acquire all vibration frequencies of the fan case before acquiring the load current of the terminal and the vibration signal set of the fan case, and determine a main vibration frequency range according to the vibration frequencies; and the method is also used for determining a vibration signal set to be acquired according to the corresponding relation between the preset frequency range and the vibration signal type and the frequency range corresponding to the main vibration frequency range. In the present embodiment, the type of the vibration signal in the vibration signal set includes one of a vibration speed, a vibration displacement, or a vibration acceleration.
In another specific embodiment, the optional control device further includes a signal to be obtained determining module, a weight determining module and a vibration value calculating module, where the signal to be obtained determining module is configured to obtain all vibration frequencies of the fan case and determine a frequency range to which each vibration frequency belongs before obtaining the load current of the terminal and the vibration signal set of the fan case, and further is configured to determine the vibration signal set to be obtained according to a preset correspondence between the frequency range and the vibration signal type and a frequency range to which each vibration frequency belongs; in the present embodiment, the types of the vibration signals in the vibration signal set include at least two of a vibration displacement, a vibration velocity, and a vibration acceleration. The weight determining module is used for calculating the proportion relation of the vibration frequencies in different frequency ranges and determining the weights of various types of vibration signals to be acquired according to the proportion relation. The vibration value calculation module is used for carrying out weighted summation on the vibration values of the vibration signals of each type according to the weight of the vibration signals of each type after the load current of the terminal machine and the vibration signal set of the fan box are obtained, and determining the summation result as the vibration value of the vibration signal set.
Based on the same inventive concept, the embodiment of the invention also provides a central range hood system. Fig. 7 is a schematic structural diagram of a central range hood system according to an embodiment of the present invention, showing a positional relationship of each device in the system; fig. 8 is a schematic structural diagram of another central range hood system according to an embodiment of the present invention, which shows a communication connection relationship between devices in the system. As shown in fig. 7 and 8, the central range hood system 60 includes a plurality of terminals 601, a plurality of vibration sensors 602, and a plurality of power distribution valves 603; the power distribution valve 603 is arranged at the inlet of the common flue 604, the terminal machine 601, the power distribution valve 603 and the vibration sensor 602 are arranged in one-to-one correspondence, and the power distribution valve 603 is electrically connected with the vibration sensor 602 and the terminal machine 601 respectively; the power distribution valve 603 is used for detecting the load current of the terminal 601; the vibration sensor 602 is used for detecting a vibration signal set of a fan box body of the terminal 601 and sending the vibration signal set to the power distribution valve 603; the set of vibration signals includes at least one type of vibration signal; the power distribution valve 603 includes a processor 6031 and a memory 6032; the memory 6032 has one or more programs stored thereon, which when executed by the processor, cause the processor 6031 to implement the control method of the central range hood system as provided in any of the embodiments described above.
Wherein the vibration sensor 602 may include at least one of a vibration displacement sensor, a vibration velocity sensor, or a vibration acceleration sensor; the vibration sensor may have a function of detecting at least one vibration signal selected from the group consisting of a vibration displacement, a vibration velocity, and a vibration acceleration.
The memory 6032, which is a computer-readable storage medium, may be used to store a software program, a computer-executable program, and modules, such as program instructions/modules (e.g., the information acquisition module 501 and the state determination module 502 in the control apparatus) corresponding to the control method in the embodiment of the present invention. The processor 6031 executes various functional applications and data processing of the central range hood system by executing software programs, instructions and modules stored in the memory 6032, that is, implements the control method of the central range hood system described above.
According to the central range hood system provided by the embodiment of the invention, the vibration signal set of the fan box body of the terminal is detected through the vibration sensor, the vibration signal set is sent to the power distribution valve, meanwhile, the load current of the terminal is detected through the power distribution valve, the on-off state of the fan in the terminal is judged according to the load current and the vibration signal set, the external environment interference and the current interference of the terminal in the non-fan operation can be avoided, and the accurate identification of the opening of the fan of the terminal is realized.
In addition, as shown in fig. 7, the central range hood system 60 further includes a host 605, where the host 605 is communicatively connected with the power distribution valve 603, so that the operating conditions of the terminals 601 are reported to the host 605 by the power distribution valve 603, so that the host 605 adjusts parameters such as the operating frequency of the host fan and the valve opening angle of each power distribution valve 603 according to the operating conditions of each terminal 601, thereby realizing efficient and energy-saving operation of the central range hood system 60.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (8)
1. A control method of a central range hood system, comprising:
acquiring all vibration frequencies of a fan box body, and determining a frequency range to which each vibration frequency belongs;
Determining a vibration signal set to be acquired according to a corresponding relation between a preset frequency range and a vibration signal type and a frequency range to which each vibration frequency belongs; the type of the vibration signals in the vibration signal set comprises at least two of vibration displacement, vibration speed and vibration acceleration;
Calculating the proportional relation of vibration frequencies in different frequency ranges, and determining the weights of various types of vibration signals to be acquired according to the proportional relation;
acquiring load current of a terminal;
according to the weight of each type of vibration signal, weighting and summing the vibration values of each type of vibration signal, and determining the summation result as the vibration value of the vibration signal set;
and if the load current is greater than or equal to a preset current threshold value and the vibration value of the vibration signal set is greater than or equal to a preset vibration threshold value, judging that a fan of the terminal machine is started.
2. The control method according to claim 1, characterized in that, after determining that the blower of the terminal is turned on, the control method further comprises:
Generating a starting signal and sending the starting signal to a host;
and receiving valve opening angle information fed back by the host, and adjusting the valve opening angle of the valve plate according to the valve opening angle information.
3. The control method according to claim 1, characterized in that the control method further comprises:
if the load current is zero, judging that a fan of the terminal machine is closed; or alternatively
And if the load current is smaller than the preset current threshold value and/or the vibration value of the vibration signal set is smaller than the preset vibration threshold value, judging that the fan of the terminal machine is closed.
4. A control method according to claim 3, wherein after determining that the blower of the terminal is turned off, the control method further comprises:
generating a shutdown signal and sending the shutdown signal to a host;
And receiving a valve closing instruction fed back by the host, and controlling the valve plate to be closed according to the valve closing instruction.
5. A control device for a central range hood system, comprising:
The signal to be acquired determining module is used for acquiring all vibration frequencies of the fan box and determining the frequency range of each vibration frequency; determining a vibration signal set to be acquired according to a corresponding relation between a preset frequency range and a vibration signal type and a frequency range to which each vibration frequency belongs; the type of the vibration signals in the vibration signal set comprises at least two of vibration displacement, vibration speed and vibration acceleration;
the weight determining module is used for calculating the proportion relation of the vibration frequencies in different frequency ranges and determining the weights of various types of vibration signals to be acquired according to the proportion relation;
the information acquisition module is used for acquiring the load current of the terminal;
the vibration value calculation module is used for carrying out weighted summation on the vibration values of the vibration signals of all types according to the weight of the vibration signals of all types, and determining the summation result as the vibration value of the vibration signal set;
And the state judging module is used for judging that the fan of the terminal machine is started when the load current is greater than or equal to a preset current threshold value and the vibration value of the vibration signal set is greater than or equal to a preset vibration threshold value.
6. The control device according to claim 5, characterized by further comprising:
The state reporting module is used for generating a starting signal after judging that the fan of the terminal machine is started, and sending the starting signal to the host machine;
And the valve opening angle adjusting module is used for receiving the valve opening angle information fed back by the host and adjusting the valve opening angle of the valve plate according to the valve opening angle information.
7. A central range hood system, comprising: a plurality of terminals, a plurality of vibration sensors, and a plurality of power distribution valves;
The terminal machine, the power distribution valve and the vibration sensor are arranged in one-to-one correspondence, and the power distribution valve is respectively and electrically connected with the vibration sensor and the terminal machine; the power distribution valve is used for detecting the load current of the terminal; the vibration sensor is used for detecting a vibration signal set of a fan box body of the terminal machine and sending the vibration signal set to the power distribution valve; the set of vibration signals includes at least one type of vibration signal;
the power distribution valve comprises a processor and a memory; the memory has one or more programs stored thereon, which when executed by the processor, cause the processor to implement the method of controlling a central range hood system according to any of claims 1-4.
8. The central range hood system of claim 7, further comprising a main machine in communication with the power distribution valve.
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| CN106438429A (en) * | 2016-09-30 | 2017-02-22 | 广东美的环境电器制造有限公司 | Fan and control method and device for turning on or turning off fan |
| CN110953179A (en) * | 2020-02-26 | 2020-04-03 | 浙江上风高科专风实业有限公司 | Fan state monitoring method and system based on inverse wavelet transform |
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| RU2068553C1 (en) * | 1994-08-29 | 1996-10-27 | Костюков Владимир Николаевич | Method of evaluation of technical condition of centrifugal pumping set by vibration of body |
| US20070221149A1 (en) * | 2006-03-22 | 2007-09-27 | Victoriano Ruiz | Auxiliary cam phaser hydraulic circuit and method of operation |
| KR102000499B1 (en) * | 2013-02-25 | 2019-07-17 | 웅진코웨이 주식회사 | Range hood |
| CN112801199B (en) * | 2021-02-07 | 2023-06-16 | 盛景智能科技(嘉兴)有限公司 | Excavator movable arm service life prediction method and device, electronic equipment and storage medium |
| CN113357688B (en) * | 2021-07-27 | 2022-05-31 | 杭州老板电器股份有限公司 | Central range hood system control method and device and central range hood system |
| CN113883568A (en) * | 2021-11-05 | 2022-01-04 | 杭州老板电器股份有限公司 | Central range hood, terminal part and air valve control method of range hood |
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| CN106438429A (en) * | 2016-09-30 | 2017-02-22 | 广东美的环境电器制造有限公司 | Fan and control method and device for turning on or turning off fan |
| CN110953179A (en) * | 2020-02-26 | 2020-04-03 | 浙江上风高科专风实业有限公司 | Fan state monitoring method and system based on inverse wavelet transform |
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