CN114440284A - 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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- CN114440284A CN114440284A CN202210275954.8A CN202210275954A CN114440284A CN 114440284 A CN114440284 A CN 114440284A CN 202210275954 A CN202210275954 A CN 202210275954A CN 114440284 A CN114440284 A CN 114440284A
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000001133 acceleration Effects 0.000 claims description 23
- 238000006073 displacement reaction Methods 0.000 claims description 23
- 239000000779 smoke Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 4
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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 and a control method and a control device thereof, wherein the control method comprises the following steps: acquiring load current of a terminal machine and a vibration signal set of a fan box body; the vibration signal set comprises at least one type of vibration signal; and if the load current is greater than or equal to the preset current threshold value and the vibration value of the vibration signal set is greater than or equal to the preset vibration threshold value, judging that the fan of the terminal machine is started. According to the technical scheme of the embodiment of the invention, the power distribution valve can be accurately linked with the terminal machine, and the on-off state of the fan in the terminal machine can be accurately judged.
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 host machine, a terminal machine and a power distribution valve. The host machine is a device which is arranged at an outlet of a public flue of a house roof, is used for forcibly discharging smoke of oil smoke in the public flue and is internally provided with a fan; the terminal machine is an exhaust appliance such as a range hood or an integrated stove; the power distribution valve is a device which is arranged between the outlet of the exhaust pipe of the terminal and the inlet of the public flue and is used for adjusting the exhaust volume of the terminal. The terminal machine, the power distribution valve and the host machine are communicated in a wired or wireless mode.
The central range hood system is designed for solving the problem of unsmooth smoke discharge of a public discharge flue of a high-rise residence, and the starting number of the terminal machines is an important basis for judging the power requirement of the central range hood system, so that the starting and stopping signals of the terminal machines are accurately identified, and the system is particularly important to be accurately controlled.
In the prior art, the on-off state of the terminal is judged by detecting the load current of the terminal, but with the development of the terminal, such as the popularization of a frequency conversion range hood, the current of a fan of the terminal is small when the fan runs at a low speed, and the power of the terminal of a part of brands is close to the lighting power when the fan runs at the low speed, so that the on-off state of the fan in the terminal can not be accurately judged only according to the load current, and the on-off number of the terminal can not be accurately judged, and the requirement of an accurate control system can not 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 method for controlling a central range hood system, including:
acquiring load current of a terminal machine and a vibration signal set of a fan box body; the vibration signal set comprises at least one type of vibration signal;
and if the load current is greater than or equal to the preset current threshold value and the vibration value of the vibration signal set is greater than or equal to the preset vibration threshold value, judging that the fan of the terminal machine is started.
Optionally, before acquiring the load current of the terminal and the vibration signal set of the blower box, the control method further includes:
acquiring all vibration frequencies of the 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 the corresponding relation between the preset frequency range and the vibration signal type and the frequency range corresponding to the main vibration frequency range; the type of the vibration signal in the vibration signal set includes one of a vibration velocity, a vibration displacement, or a vibration acceleration.
Optionally, before obtaining the load current of the terminal and the vibration signal set of the blower housing, the control method further includes:
acquiring all vibration frequencies of a fan box body, and determining the frequency range of each vibration frequency;
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 to which each vibration frequency belongs; the types of the vibration signals in the vibration signal set comprise at least two of vibration displacement, vibration speed and vibration acceleration;
calculating the proportional relation of the vibration frequencies in different frequency ranges, and determining the weight of each type of vibration signal to be acquired according to the proportional relation;
after acquiring the load current of the terminal machine and the vibration signal set of the fan box body, the control method further comprises the following steps:
and carrying out weighted summation on the vibration values of the vibration signals of the types according to the weight of the vibration signals of the types, and determining the summation result as the vibration value of the vibration signal set.
Optionally, after determining that the blower 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 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.
Optionally, the control method further includes:
if the load current is zero, judging that a fan of the terminal machine is closed; or,
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.
Optionally, after determining that the blower 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 close according to the valve closing instruction.
In a second aspect, an embodiment of the present invention further provides a control device for a central range hood system, including:
the information acquisition module is used for acquiring the load current of the terminal and the vibration signal set of the fan box body; the vibration signal set comprises at least one type of vibration signal;
and the state determination module is used for determining 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 comprises:
the state reporting module is used for generating a starting signal after judging that the fan of the terminal is started and sending the starting signal to the host;
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.
In a third aspect, an embodiment of the present invention further provides a central extractor hood system, including: a plurality of terminal machines, 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 a one-to-one correspondence manner, 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 machine; 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 vibration signal set comprises at least one type of vibration signal;
the power distribution valve comprises a processor and a memory; the memory stores one or more programs, and when the one or more programs are executed by the processor, the processor is enabled to realize the control method of the central range hood system provided by the first aspect.
Optionally, the central extractor hood system further comprises a host computer, and the host computer 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 by acquiring the load current of the terminal and the vibration signal set of the fan box body, and when the load current is greater than or equal to the preset current threshold value and the vibration value of the vibration signal set is greater than or equal to the preset vibration threshold value, the on-off state of the fan in the terminal can be judged by utilizing the vibration value generated by the fan box body when the fan runs and combining the load current of the terminal, so that the external environment interference and the current interference of the terminal when the terminal does not run are avoided, and the accurate identification of the fan start (namely the start of the smoke discharge function of the terminal) of the terminal is realized.
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 schematic flow chart of another control method of a central extractor hood system according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of another control method of a central range hood system according to an embodiment of the present invention;
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;
fig. 5 is a flowchart illustrating 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 extractor hood system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a central extractor hood system according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another central extractor hood system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic flow chart of a control method of a central extractor 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 can 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 load current of the terminal and a vibration signal set of the fan box body.
The terminal machine may be a range hood or an integrated stove or other equipment with a smoke exhaust function, and the description will be given by taking the range hood as an example. The load current of the terminal machine can be detected by the power distribution valve.
Wherein the set of vibration signals includes at least one type of vibration signal. For example, the type of the vibration signal may include vibration displacement, vibration velocity, vibration acceleration, and the like. The vibration sensor can be used for acquiring vibration signals and sending the vibration signals to the power distribution valve to be used as one of the bases for judging whether the fan of the terminal machine is started.
When the range hood runs at different gears, the fan box body 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 body, the vibration signal set of the fan box body is obtained and is used as one of the bases for judging whether the fan of the terminal machine is started, the accuracy of a judgment result can be improved, and the condition for specifically judging whether the fan is started is detailed in S102.
And 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 may be determined according to experience or actual operating parameters of the terminal. Illustratively, a 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 the vibration energy obtained by converting the vibration signal in the vibration signal set, and correspondingly, the preset vibration threshold can be the vibration energy at the lowest gear, so that no matter what type of vibration signal is collected, the preset vibration threshold does not need 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 also be understood as the amplitude of the vibration signal, and adaptively, the preset vibration threshold may be preset by using the same type of vibration signal without performing conversion.
Further, when the load current is detected to be larger than or equal to the preset current threshold value and the vibration value of the vibration signal set is larger than or equal to the preset vibration threshold value, the fan is indicated to run at least at the lowest gear, and the fan of the terminal machine can be judged to be started. The embodiment of the invention adopts double judgment bases of the load current and the vibration signal set, thereby not only avoiding interference caused by current generated by other loads close to the working current of the fan, but also avoiding misjudgment caused by vibration of the fan box body due to external environment interference, 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 by acquiring the load current of the terminal and the vibration signal set of the fan box body, and when the load current is greater than or equal to the preset current threshold value and the vibration value of the vibration signal set is greater than or equal to the preset vibration threshold value, the on-off state of the fan in the terminal can be judged by utilizing the vibration value generated by the fan box body when the fan runs and combining the load current of the terminal, so that the external environment interference and the current interference of the terminal when the terminal does not run are avoided, and the accurate identification of the fan start (namely the start of the smoke discharge function of the terminal) of the terminal is realized.
Fig. 2 is a schematic flow chart of another control method of a central range hood system according to an embodiment of the present invention, and a determination manner of a vibration signal in a vibration signal set is additionally described on the basis of the above embodiment. As shown in fig. 2, in this embodiment, the control method may include the following steps:
s201, acquiring all vibration frequencies of the fan box body, and determining a main vibration frequency range according to the vibration frequencies.
The fan causes the fan housing to vibrate during operation, the vibration having a plurality of different vibration frequencies. Furthermore, a plurality of vibration frequencies of the fan box body are distributed in different frequency ranges, and by determining in which frequency range the vibration frequencies are more concentrated, which frequency range can be used as the main vibration frequency range. Illustratively, the frequency range may be divided into a low frequency range (e.g., 0 to 500Hz), a medium frequency range (e.g., 500 to 2000Hz), and a high frequency range (e.g., a frequency range having a frequency above 2000 Hz). For example, the power distribution valve may obtain the vibration frequency of the fan box body through a vibration sensor.
S202, 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 velocity, a vibration displacement, or a vibration acceleration. Specifically, the vibration velocity, the vibration displacement and the vibration acceleration can be used for representing the vibration energy, and one of the vibration velocity, the vibration displacement and the vibration acceleration can be used as a vibration signal concentrated by the vibration signal.
Further, research finds that when the object vibrates at low frequency, the vibration displacement representation vibration energy is more accurate, when the object vibrates at medium frequency, the vibration speed representation vibration energy is more accurate, and when the object vibrates at high frequency, the vibration acceleration representation vibration energy is more accurate. Therefore, the correspondence between the 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, 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 obtained, and when the vibration signal set is obtained subsequently, the type of the vibration signal can be obtained. For example, assuming that the vibration signal of the fan box body is concentrated in the intermediate frequency range, that is, the main vibration frequency corresponds to the intermediate frequency range, the vibration signal concentrated in the vibration signal to be acquired is the vibration speed, and the vibration speed of the fan box body can be used as one of the bases for judging whether the fan is turned on.
And S203, acquiring the load current of the terminal and the vibration signal set of the fan box body.
As described above, in the present embodiment, the vibration signal in which the vibration signal is concentrated is one of a vibration displacement, a vibration speed, and a vibration acceleration, and may be specifically determined according to the type of the vibration signal corresponding to the main vibration frequency of the fan box.
And 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.
In the embodiment, the main vibration frequency range of the fan box body is determined in advance, the type of the vibration signal in the vibration signal set to be acquired is determined according to the type of the vibration signal corresponding to the main vibration frequency range, and then when the vibration signal set is acquired, only the vibration signal of the type 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 to serve as judgment bases, on one hand, the accuracy of judgment results can be guaranteed, 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 schematic flow chart of another control method of a central extractor hood system according to an embodiment of the present invention, and provides another determination method for concentrating a vibration signal into 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 the fan box body, and determining the frequency range to which each vibration frequency belongs.
As described above, the fan vibrates the fan box body during operation, the vibration of the fan box body has a plurality of different vibration frequencies, and the plurality of vibration frequencies of the fan box body are distributed in different frequency ranges. In this embodiment, the frequency range may include a low frequency range, an intermediate frequency range, and a high frequency range, among all the vibration frequencies of the fan box body, there may be a vibration frequency belonging to the low frequency range, there may also be a vibration frequency belonging to the intermediate frequency range, and there may also be a vibration frequency belonging to the high frequency range, after all the vibration frequencies of the fan box body are collected, the frequency range to which each vibration frequency belongs may be determined, and then the type of the vibration signal in the vibration signal set to be obtained is determined according to the correspondence between the frequency range and the type of the vibration signal, which is described in detail in S302.
S302, 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 to which each vibration frequency belongs.
In this embodiment, 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 velocity, and the vibration signal type corresponding to the high frequency range is vibration acceleration. Generally, the vibration of the fan box body has at least two of a low-frequency vibration frequency, a medium-frequency vibration frequency and a high-frequency vibration frequency, and therefore, in the present embodiment, the type of the vibration signal in the vibration signal set includes at least two of a vibration displacement, a vibration speed and a vibration acceleration. Specifically, after the frequency range to which the vibration frequency of the fan box body 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 box body belong to a low-frequency range and a medium-frequency range respectively, the types of the vibration signals in the vibration signal set to be acquired include vibration displacement and vibration speed; if all vibration frequencies of the fan box body belong to a high-frequency range and a medium-frequency range respectively, the type of the vibration signal to be acquired in a centralized manner comprises vibration acceleration and vibration speed; if all vibration frequencies of the fan box body belong to a low-frequency range, a medium-frequency range and a high-frequency range respectively, the types of the vibration signals to be acquired in the vibration signal set comprise vibration displacement, vibration speed and vibration acceleration.
S303, calculating the proportional relation of the vibration frequencies in different frequency ranges, and determining the weight of each type of vibration signal to be acquired according to the proportional relation.
According to the above, the vibration energy in different frequency ranges can be represented by different types of vibration signals, and when a plurality of vibration frequencies of the fan box body belong to different frequency ranges, the vibration energy of the fan box body can be represented together by combining the different types of vibration signals corresponding to the different frequency ranges, so that the accuracy of the judgment result is further improved. For example, when vibration energy is calculated by using a plurality of types of vibration signals together, the vibration values of the respective types of vibration signals may be weighted and summed.
Further, the proportional relationship may be a number ratio of the vibration frequencies in different frequency ranges, and the number ratio may reflect a concentration degree of the vibration frequency of the fan box in each frequency range, so that the weight of the vibration signal type corresponding to each frequency range in calculating the vibration energy may be reflected, and the weight of each type of vibration signal to be acquired may be calculated according to the proportional relationship.
For example, if 10 vibrations with different frequencies exist in the fan box body, 3 frequencies in the 10 frequencies belong to a low frequency range, 6 frequencies belong to a medium frequency range, and 1 frequency belongs to a high frequency range, the type of the vibration signal to be acquired includes vibration displacement, vibration speed and vibration acceleration, and the proportional relationship between the vibration frequencies in the different frequency ranges is low frequency: intermediate frequency: the high frequency was 3:6: 1. Further, the weight of the vibration displacement corresponding to the low frequency is 3/10; the weight of the vibration speed corresponding to the intermediate frequency is 3/5; the vibration acceleration corresponding to the high frequency is weighted 1/10. Subsequently, after the vibration displacement, the vibration speed and the vibration acceleration of the fan box body are obtained, weighting calculation can be performed according to the weight corresponding to each vibration signal, so as to obtain a vibration value of the vibration signal set, which is detailed in S305.
And S304, acquiring the load current of the terminal and the vibration signal set of the fan box body.
And S305, carrying out weighted summation on the vibration values of the vibration signals of the types according to the weights of the vibration signals of the types, and determining the summation result as the vibration value of the vibration signal set.
For example, assuming that the vibration signals in the acquired vibration signal set include vibration displacement, vibration velocity, and vibration acceleration, the vibration values of the respective vibration signals are A, B and C, respectively, and the weights corresponding to the respective vibration signals are a, b, and C, respectively, in this order, the vibration value Q of the vibration signal set is aA + bB + cC.
S306, if the load current is larger than or equal to the preset current threshold value and the vibration value of the vibration signal set is larger than or equal to the preset vibration threshold value, the fan of the terminal is judged to be started.
In the embodiment of the invention, all vibration frequencies of the fan box body are acquired, the frequency range to which each vibration frequency belongs is determined, the vibration signal set to be acquired can be further 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, in addition, the weight of each type of vibration signal to be acquired can be determined according to the proportional relation by calculating the proportional relation of the vibration frequencies in different frequency ranges, the vibration values of each type of vibration signal can be further subjected to weighted summation according to the weight of each type of vibration signal, and the vibration value of the vibration signal set is calculated, so that the vibration energy of the fan box body can be represented together by combining different types of vibration signals, and the accuracy of the 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 a control method after determining a fan on-off state is further described on the basis of any of the above embodiments. As shown in fig. 4, in this embodiment, the control method may include the following steps:
s401, acquiring load current of the terminal and a vibration signal set of the fan box body.
S402, determining whether the load current is greater than or equal to a preset current threshold and the vibration value of the vibration signal set is greater than or equal to a preset vibration threshold, if so, 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 to determine that the blower of the terminal machine is turned on. If either one of the two is not true, that is, if the load current is less than the preset current threshold and/or the vibration value of the vibration signal set is less than the preset vibration threshold, S406 is executed to determine that the blower of the terminal machine is turned off.
It should be noted that, the above-mentioned manner for determining that the fan of the terminal is turned off is not limited, and in other embodiments, if the load current is detected to be zero, the fan of the terminal may be determined to be turned off as well.
And S403, judging that the fan of the terminal is started, and executing S404.
S404, generating a starting signal and sending the starting signal to a host; s405 is executed.
And S405, 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.
Wherein the valve opening angle information indicates an opening angle of a valve sheet 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 degrees, and the valve is closed at the moment; 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 size of the air exhaust resistance can be adjusted by adjusting the valve opening angle of the valve plate.
Specifically, the power distribution valve can send a start signal to the host after determining that the fan is opened, the host can determine the valve opening angle information of the valve plate sent by each power distribution valve according to the current operation condition of the central range hood system (for example, the number of the terminal machines in the start state, the exhaust air volume of each terminal machine, and the like), and send the valve opening angle information to the corresponding power distribution valve, and the power distribution valve can adjust the valve opening angle of the valve plate according to the valve opening angle information after receiving the valve opening angle information.
And S406, judging that the fan of the terminal is closed, and executing S407.
S407, generating a shutdown signal, and sending the shutdown signal to a host; s408 is performed.
And S408, receiving a valve closing instruction fed back by the host, and controlling the valve plate to close according to the valve closing instruction.
Specifically, after the power distribution valve receives a valve closing instruction, the valve opening angle of the valve plate can be controlled to be 0 degrees so as to close the valve plate, oil smoke is prevented from flowing backwards, and meanwhile, the energy consumption of the system is reduced.
Fig. 5 is a specific flowchart of a control method of a central extractor hood system according to an embodiment of the present invention, and as shown in fig. 5, in an embodiment, a vibration signal in a vibration signal set may be a vibration speed. Firstly, the vibration speed V \uof the range hood in low-gear operation can be calibrated in advance according to the actually installed range hood (terminal machine)Low gearAnd a load current I \uLow gearWill vibrate at a velocity V _Low gearAs a preset vibration threshold, the load current I _Low gearAs a preset current threshold; then the power distribution valve can detect the vibration speed value V \uat the top of the fan box body in real timeFruit of Chinese wolfberryAnd the load current I \of the terminalFruit of Chinese wolfberryThen, the vibration signal is compared with a corresponding preset vibration threshold value (V \u)Low gear) And a preset current threshold (I _ \)Low gear) Comparing, and judging whether a fan of the terminal is started or not; whether the fan is started or not, the power distribution method needs to send a startup and shutdown signal of the fan to the main unit of the top floor, so that the main unit determines the running frequency of the fan of the main unit according to the startup working condition of the system, and simultaneously adjusts the valve opening angle of the power distribution method of each startup terminal machine, thereby ensuring the efficient running of the system and ensuring the smoke exhaust effect. It should be noted that, after the power distribution valve determines that the fan is opened, the valve plate of the power distribution valve may be controlled to open by 90 ° to ensure the smoke exhaust capability, and then the valve opening angle of the power distribution valve may be adjusted according to the valve opening angle information after the valve opening angle information sent by the host is received.
Based on the same inventive concept, an embodiment of the present invention further provides a control device of a central extractor hood system, fig. 6 is a schematic structural diagram of the control device of the central extractor hood system provided in the embodiment of the present invention, as shown in fig. 6, the control device includes an information obtaining module 501 and a state determining module 502, where the information obtaining module 501 is used to obtain a load current of a terminal machine and a vibration signal set of a blower box body; the vibration signal set comprises at least one type of vibration signal; the state determination module 502 is configured to determine that the blower of the terminal is turned on when the load current is greater than or equal to a preset current threshold and the 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 corresponding functional modules and beneficial effects of the execution method.
On the basis of the foregoing embodiment, the state determination 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 smaller than a preset current threshold and/or the vibration value of the vibration signal set is smaller than a preset vibration threshold.
Optionally, the control device further comprises a state reporting module and a valve opening angle adjusting module, wherein the state reporting module is configured to generate a startup signal after determining that the blower of the terminal is started, and send the startup signal to the host; 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. In addition, the state reporting module can 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; the valve opening angle adjusting module is used for receiving a valve closing instruction fed back by the host 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 to-be-acquired signal determining module, configured to acquire all vibration frequencies of the blower box before the load current of the terminal and the vibration signal set of the blower box are acquired, and determine a main vibration frequency range according to the vibration frequencies; and the vibration signal acquisition module 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 velocity, a vibration displacement, or a vibration acceleration.
In another specific embodiment, the optional control device further comprises a to-be-acquired signal determining module, a weight determining module and a vibration value calculating module, wherein the to-be-acquired signal determining module is used for acquiring all vibration frequencies of the fan box body before acquiring the load current of the terminal machine and the vibration signal set of the fan box body, determining a frequency range to which each vibration frequency belongs, and determining the vibration signal set to be acquired according to a corresponding relationship between a preset frequency range and a vibration signal type and the 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 vibration displacement, vibration velocity, and vibration acceleration. The weight determining module is used for calculating the proportional relation of the vibration frequencies in different frequency ranges and determining the weight of each type of vibration signal to be acquired according to the proportional relation. And the vibration value calculation module is used for weighting and summing the vibration values of the vibration signals of various types according to the weight of the vibration signals of various types after acquiring the load current of the terminal machine and the vibration signal set of the fan box body, and determining the summation result as the vibration value of the vibration signal set.
Based on the same invention concept, the embodiment of the invention also provides a central range hood system. Fig. 7 is a schematic structural diagram of a central extractor hood system according to an embodiment of the present invention, which illustrates a positional relationship between devices in the system; fig. 8 is a schematic structural diagram of another central extractor hood system according to an embodiment of the present invention, which illustrates a communication connection relationship between devices in the system. As shown in fig. 7 and 8, the central extractor hood system 60 includes a plurality of terminal machines 601, a plurality of vibration sensors 602, and a plurality of power distribution valves 603; the power distribution valve 603 is installed at the inlet of the common flue 604, the terminal 601, the power distribution valve 603 and the vibration sensor 602 are arranged in a one-to-one correspondence manner, and the power distribution valve 603 is electrically connected with the vibration sensor 602 and the terminal 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 vibration signal set comprises at least one type of vibration signal; power distribution valve 603 includes a processor 6031 and a memory 6032; the memory 6032 stores one or more programs, and when the one or more programs are executed by the processor, the processor 6031 is enabled to implement the control method of the central extractor hood system according to any one 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 detecting device may have a function of detecting at least one of a vibration displacement, a vibration velocity, and a vibration acceleration.
The memory 6032 is a computer-readable storage medium that can be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the control method in the embodiment of the present invention (for example, the information acquisition module 501 and the state determination module 502 in the control apparatus). The processor 6031 executes various functional applications and data processing of the central extractor hood system by running software programs, instructions and modules stored in the memory 6032, so as to implement the control method of the central extractor hood system.
The central range hood system provided by the embodiment of the invention detects the vibration signal set of the fan box body of the terminal machine through the vibration sensor, sends the vibration signal set to the power distribution valve, detects the load current of the terminal machine through the power distribution valve, and judges the on-off state of the fan in the terminal machine according to the load current and the vibration signal set, so that the external environment interference and the current interference of the terminal machine when the terminal machine is not operated by the fan can be avoided, and the accurate identification of the on-off of the fan of the terminal machine is realized.
In addition, as shown in fig. 7, the central extractor hood system 60 further includes a host 605, where the host 605 is in communication connection with the power distribution valve 603, so as to report the operation condition of the terminal 601 to the host 605 through the power distribution valve 603, so that the host 605 adjusts the operation frequency of the host fan and the parameters such as the valve opening angle of each power distribution valve 603 according to the operation condition of each terminal 601, thereby implementing efficient and energy-saving operation of the central extractor hood system 60.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. A control method of a central range hood system is characterized by comprising the following steps:
acquiring load current of a terminal machine and a vibration signal set of a fan box body; the set of vibration signals includes at least one type of vibration signal;
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 of claim 1, wherein prior to obtaining the load current of the terminal and the vibration signal set of the blower housing, the control method further comprises:
acquiring all vibration frequencies of the fan box body, and determining a main vibration frequency range according to the vibration frequencies;
determining the 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; the type of the vibration signal in the vibration signal set comprises one of vibration speed, vibration displacement or vibration acceleration.
3. The control method of claim 1, wherein prior to obtaining the load current of the terminal and the vibration signal set of the blower housing, the control method further comprises:
acquiring all vibration frequencies of the fan box body, and determining the frequency range of each vibration frequency;
determining the 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 to which each vibration frequency belongs; the types of the vibration signals in the vibration signal set comprise at least two of vibration displacement, vibration speed and vibration acceleration;
calculating the proportional relation of the vibration frequencies in different frequency ranges, and determining the weight of each type of vibration signal to be acquired according to the proportional relation;
after acquiring the load current of the terminal machine and the vibration signal set of the fan box body, the control method further comprises the following steps:
and according to the weight of each type of vibration signal, carrying out weighted summation on the vibration value of each type of vibration signal, and determining the summation result as the vibration value of the vibration signal set.
4. The control method according to claim 1, wherein 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 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.
5. The control method according to claim 1, characterized by further comprising:
if the load current is zero, judging that a fan of the terminal machine is closed; or,
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 a fan of the terminal machine is turned off.
6. The control method of claim 5, 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 close according to the valve closing instruction.
7. A control device of a central range hood system is characterized by comprising:
the information acquisition module is used for acquiring the load current of the terminal and the vibration signal set of the fan box body; the set of vibration signals includes at least one type of vibration signal;
and the state determination module is used for determining 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.
8. The control device according to claim 7, 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;
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.
9. A central range hood system, comprising: a plurality of terminal machines, 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 a one-to-one correspondence manner, 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 machine; 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 includes a processor and a memory; the memory stores one or more programs which, when executed by the processor, cause the processor to implement the control method of the central extractor hood system according to any one of claims 1 to 6.
10. The central extractor hood system of claim 9 further comprising a host computer communicatively coupled to the power distribution valve.
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Cited By (1)
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| CN116147040A (en) * | 2023-04-17 | 2023-05-23 | 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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