A central range hood system and its control method

Abstract

An embodiment of the present invention discloses a central range hood system and a control method thereof. The control method includes: obtaining vibration information at the top of the fan housing in the terminal, where the vibration information includes at least one of vibration velocity, vibration displacement, and vibration acceleration; and determining that the terminal is powered on when it is detected that the vibration information is greater than or equal to a vibration threshold. The control method of the central range hood system provided by the embodiment of the present invention can accurately identify the start-stop signal of the fan of the terminal, realize the precise linkage between the power distribution valve and the terminal, ensure the normal operation of the central range hood system, and improve the user experience.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of household appliances, and in particular, to a central range hood system and a control method thereof. Background Art

[0002] The central range hood system is designed to solve the problem of poor smoke exhaust in the common smoke exhaust ducts of high-rise residential buildings. The number of powered-on terminals is an important basis for judging the power demand of the central range hood system. Therefore, accurately identifying the on-off signals of the terminals is particularly important for the correct control of the system. At the same time, the accurate identification of the on-off signals of the terminal fan by the power distribution valve has a crucial impact on the user experience.

[0003] In the existing central range hood system, the power distribution valve identifies the opening or closing of the terminal by detecting the load current of the terminal to judge its on-off state. With the popularization of variable-frequency terminals, the current is small when the terminal runs at a low speed, which has exceeded the accurate identification threshold of the current detection circuit. In addition, the power of the lighting lamp of some brand terminals is close to the low-gear power value of the terminal, and the current detection circuit cannot accurately judge whether the terminal fan is turned on or the lighting lamp is turned on, and cannot effectively solve the problem of identifying the gears of different brand terminals. Therefore, the method of only detecting the load current of the terminal can no longer well meet the development needs of terminal products. Summary of the Invention

[0004] Embodiments of the present invention provide a central range hood system and a control method thereof to solve the problem that the existing central range hood system cannot accurately identify the opening or closing of the terminal.

[0005] Embodiments of the present invention provide a control method for a central range hood system, and the control method includes:

[0006] Obtaining vibration information at the top of the fan housing in the terminal, where the vibration information includes at least one of vibration velocity, vibration displacement, and vibration acceleration;

[0007] When it is detected that the vibration information is greater than or equal to a vibration threshold, it is determined that the terminal is powered on.

[0008] Optionally, after obtaining the vibration information at the top of the fan housing in the terminal, it further includes:

[0009] Obtaining air volume information inside the air duct of the terminal;

[0010] When it is detected that the vibration information is greater than or equal to the vibration threshold and the air volume information is greater than an air volume threshold, it is determined that the terminal is powered on.

[0011] Optionally, the air volume information includes at least one of static pressure information, wind speed information, and pendulum acceleration;

[0012] Obtaining the air volume information inside the air duct of the terminal machine includes:

[0013] Obtaining the static pressure information inside the air duct of the terminal machine; and / or,

[0014] Obtaining the wind speed information inside the air duct of the terminal machine; and / or,

[0015] Obtaining the pendulum acceleration inside the air duct of the terminal machine.

[0016] Optionally, when it is detected that the vibration information is greater than or equal to the vibration threshold, determining that the terminal machine is powered on includes:

[0017] When the ratio of the number of times that the vibration information is detected to be greater than or equal to the vibration threshold to the total number of detections within the first preset time period is greater than the first preset ratio, determining that the terminal machine is powered on.

[0018] Optionally, after determining that the terminal machine is powered on, it further includes:

[0019] Generating a power-on information and sending the power-on information to the host;

[0020] Adjusting the opening degree of the valve plate according to the valve plate opening instruction feedback by the host.

[0021] Optionally, this control method further includes:

[0022] When it is detected that the vibration information is less than the vibration threshold, determining that the terminal machine is powered off.

[0023] Optionally, after determining that the terminal machine is powered off, it further includes:

[0024] Generating a power-off information and sending the power-off information to the host;

[0025] Controlling the valve plate to close according to the valve plate closing instruction feedback by the host.

[0026] Optionally, this control method further includes:

[0027] When the ratio of the number of times that the vibration information obtained in the later time is greater than the vibration information obtained in the previous time to the total number of comparisons within the second preset time period is greater than the second preset ratio, determining that the gear of the terminal machine is increased.

[0028] Based on the same inventive concept, an embodiment of the present invention further provides a central range hood system, which includes a plurality of terminal machine modules, and the terminal machine module includes an air duct, a power distribution valve, a vibration sensor, and a terminal machine;

[0029] The vibration sensor is electrically connected to the power distribution valve. The vibration sensor collects vibration information at the top of the fan housing and sends the vibration information to the power distribution valve. Among them, the vibration information includes at least one of vibration speed, vibration displacement, and vibration acceleration.

[0030] The power distribution valve receives the vibration information and determines that the terminal is turned on when it detects that the vibration information is greater than or equal to the vibration threshold.

[0031] Optionally, the terminal module further includes an air volume sensor.

[0032] The air volume sensor is electrically connected to the power distribution valve. The air volume sensor collects air volume information inside the air duct and sends the air volume information to the power distribution valve.

[0033] The power distribution valve receives the vibration information and the air volume information, and determines that the terminal is turned on when it detects that the vibration information is greater than or equal to the vibration threshold and the air volume information is greater than the air volume threshold.

[0034] Optionally, the central range hood system further includes a host, and the host is communicatively connected to the power distribution valve.

[0035] When the power distribution valve determines that the terminal is turned on, it generates a turn-on information and sends the turn-on information to the host.

[0036] The host receives all the turn-on information sent by the power distribution valves, and correspondingly generates a plurality of valve opening instructions according to the plurality of turn-on information, so as to control the valve opening of the corresponding power distribution valve through the valve opening instructions.

[0037] The control method of the central range hood system provided by the embodiments of the present invention utilizes the fact that different degrees of vibration will be generated in the fan housing when the terminal is running. According to the vibration information at the top of the fan housing, the on / off status of the terminal is detected, and the start / stop signal of the terminal fan can be accurately identified, realizing the precise linkage between the power distribution valve and the terminal, ensuring the normal operation of the central range hood system, and improving the user experience. Description of the Drawings

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, although the following drawings are some specific embodiments of the present invention, for those skilled in the art, according to the basic concepts of the device structure, driving method, and manufacturing method disclosed and prompted by various embodiments of the present invention, they can be extended and extended to other structures and drawings. Undoubtedly, all of these should be within the scope of the claims of the present invention.

[0039] Figure 1 It is a flowchart of a control method for a central range hood system provided by an embodiment of the present invention;

[0040] Figure 2 It is a schematic structural diagram of a central range hood system provided by an embodiment of the present invention;

[0041] Figure 3 It is a flowchart of another control method for a central range hood system provided by an embodiment of the present invention;

[0042] Figure 4 It is a flowchart of yet another control method for a central range hood system provided by an embodiment of the present invention;

[0043] Figure 5 It is a flowchart of yet another control method for a central range hood system provided by an embodiment of the present invention;

[0044] Figure 6 It is a flowchart of yet another control method for a central range hood system provided by an embodiment of the present invention. Detailed Embodiments

[0045] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will, with reference to the accompanying drawings in the embodiments of the present invention, clearly and completely describe the technical solutions of the present invention through implementation manners. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the basic concepts disclosed and prompted by the embodiments in the present invention, all other embodiments obtained by those skilled in the art fall within the scope of protection of the present invention.

[0046] Figure 1 It is a flowchart of a control method for a central range hood system provided by an embodiment of the present invention. As Figure 1 shown, the control method for the central range hood system provided by the embodiment of the present invention includes:

[0047] S110. Obtain the vibration information at the top of the fan housing in the terminal, where the vibration information includes at least one of vibration velocity, vibration displacement, and vibration acceleration.

[0048] Figure 2 This is a schematic structural diagram of a central range hood system provided by an embodiment of the present invention. As Figure 2 shown, the central range hood system provided by the embodiment of the present invention includes a common flue 10 and a plurality of terminal unit modules 20. Each terminal unit module 20 is provided with an air duct 21, a power distribution valve 22, a vibration sensor 23, and a terminal unit 24. Among them, the terminal unit 24 can be a range hood or an integrated stove. A fan is provided in the terminal unit 24. When the terminal unit 24 operates, the fan rotates, which will cause different degrees of vibration in the fan housing of the terminal unit 24. The vibration sensor 23 can collect the vibration information at the top of the fan housing in real time, so that the power distribution valve 22 can judge whether the terminal unit 24 is turned on according to the vibration information.

[0049] Among them, the vibration information can include one or more of vibration velocity, vibration displacement, and vibration acceleration. Vibration velocity characterizes the speed of vibration, vibration displacement characterizes the amplitude of vibration, and vibration acceleration characterizes the speed of vibration velocity. Vibration velocity, vibration displacement, and vibration acceleration are all measurement parameters for vibration measurement, and they can all reflect the degree of vibration. The same vibration sensor 23 can collect three different parameters of vibration velocity, vibration displacement, and vibration acceleration by switching modes, or different sensors can be used to collect different parameters. For example, vibration velocity can be collected by a vibration velocity sensor, and vibration displacement can be collected by a vibration displacement sensor, etc.

[0050] S120. When it is detected that the vibration information is greater than or equal to the vibration threshold, it is determined that the terminal unit is turned on.

[0051] Reference Figure 2 , when the terminal unit 24 operates at the lowest gear, the vibration information at the top of the fan housing, such as the vibration velocity, is the smallest. As the operating gear of the terminal unit 24 increases, the vibration information at the top of the fan housing will also increase. The power distribution valve 22 can judge whether the terminal unit 24 is turned on according to the vibration information. Specifically, the vibration sensor 23 can send the collected vibration information to a terminal unit state recognition module electrically connected to the vibration interface circuit through the vibration interface circuit in the power distribution valve 22. A vibration threshold is pre-stored in the terminal unit state recognition module, and the vibration threshold can be set as the vibration information corresponding to the top of the fan housing when the terminal unit 24 operates at the lowest gear. When the terminal unit state recognition module detects that the vibration information collected by the vibration sensor 23 is greater than or equal to the vibration threshold, it determines that the terminal unit 24 is turned on. Since the vibration information at the top of the fan housing is directly related to whether the terminal unit 24 is turned on and operated, and it will not be misjudged due to the influence of the lighting being turned on, therefore, the power distribution valve 22 can accurately identify the start-stop signal of the fan of the terminal unit 24 according to the vibration information, realize the precise linkage between the power distribution valve 22 and the terminal unit 24, ensure the normal operation of the central range hood system, and improve the user experience.

[0052] The control method of the central range hood system provided by the embodiment of the present invention utilizes the fact that the fan housing will generate vibrations of different degrees when the terminal is running. According to the vibration information at the top of the fan housing, the on-off situation of the terminal can be detected, the start-stop signal of the terminal fan can be accurately identified, the precise linkage between the power distribution valve and the terminal can be realized, ensuring the normal operation of the central range hood system and improving the user experience.

[0053] Figure 3 is a flowchart of another control method of the central range hood system provided by the embodiment of the present invention. As Figure 3 shown, optionally, the control method includes:

[0054] S210. Obtain the vibration information at the top of the fan housing in the terminal. The vibration information includes at least one of vibration velocity, vibration displacement, and vibration acceleration.

[0055] S220. Obtain the air volume information inside the air duct of the terminal.

[0056] Referring to Figure 2 , when there is interference information such as manual construction in the environment where the terminal 24 is located, the fan housing may also generate vibrations. To avoid the interference of the external environment and achieve the accurate identification of the start signal of the terminal 24, the power distribution valve 22 can also obtain the air volume information inside the air duct 21 of the terminal 24 and judge the on-off state of the terminal 24 according to the air volume information. Specifically, an air volume sensor 25 is provided inside the air duct 21. The air volume sensor 25 can collect the air volume information inside the air duct 21 in real time and transmit the air volume information to the terminal state recognition module through the air volume interface circuit electrically connected to the air volume sensor 25 in the power distribution valve 22.

[0057] S230. When it is detected that the vibration information is greater than or equal to the vibration threshold and the air volume information is greater than the air volume threshold, determine that the terminal is turned on.

[0058] When the terminal 24 operates at different gears, the gas inside the air duct 21 has different flow degrees. When the terminal 24 operates at the lowest gear, the flow degree of the gas inside the air duct 21 is the smallest. As the gear increases, the flow degree of the gas inside the air duct 21 increases, and the air volume information such as air pressure or wind speed also increases accordingly. The power distribution valve 22 can combine the vibration information of the fan housing and the air volume information inside the air duct 21 to judge whether the terminal 24 is turned on. Specifically, the terminal state recognition module in the power distribution valve 22 determines that the terminal 24 is turned on when it detects that the vibration information of the fan housing is greater than or equal to the vibration threshold and the air volume information inside the air duct 21 of the terminal 24 is greater than the air volume threshold. The power distribution valve 22 adopts a two-dimensional detection method of vibration information and air volume information, which can filter out external environmental interference and further improve the detection accuracy.

[0059] It should be noted that the specific values of the vibration threshold and the air volume threshold in the embodiments of the present invention are not limited, and those skilled in the art can set them according to the type of the terminal 24 and the actual situation during operation.

[0060] Reference Figure 2 and Figure 3 , on the basis of the above embodiments, optionally, the air volume information includes at least one of static pressure information, wind speed information, and pendulum acceleration; S220. Obtaining the air volume information inside the air duct of the terminal includes: obtaining the static pressure information inside the air duct of the terminal; and / or obtaining the wind speed information inside the air duct of the terminal; and / or obtaining the pendulum acceleration inside the air duct of the terminal.

[0061] Specifically, the air volume sensor 25 can be a pressure sensor. The pressure sensor collects the static pressure information inside the air duct 21 in real time and sends the static pressure information to the power distribution valve 22. When the power distribution valve 22 detects that the vibration information of the fan box is greater than or equal to the vibration threshold and the static pressure information inside the air duct 21 is greater than the static pressure threshold, it determines that the terminal 24 is turned on. The air volume sensor 25 can be a wind speed sensor. The wind speed sensor collects wind speed information such as the wind speed magnitude and / or wind direction inside the air duct 21 in real time and sends the wind speed information to the power distribution valve 22. When the power distribution valve 22 detects that the vibration information of the fan box is greater than or equal to the vibration threshold and the wind speed information inside the air duct 21 is greater than the wind speed threshold, it determines that the terminal 24 is turned on. The air volume sensor 25 can also be an acceleration sensor. There is a pendulum suspended inside the air duct 21. The acceleration sensor collects the pendulum acceleration of the pendulum in real time and sends the pendulum acceleration to the power distribution valve 22. When the power distribution valve 22 detects that the vibration information of the fan box is greater than or equal to the vibration threshold and the pendulum acceleration is greater than the pendulum acceleration threshold, it determines that the terminal 24 is turned on.

[0062] It should be noted that the above only takes any one of the static pressure information, wind speed information, and pendulum acceleration included in the air volume information as an example to illustrate the specific conditions for determining that the terminal 24 is turned on. When the air volume information includes two or three of the static pressure information, wind speed information, and pendulum acceleration, the specific conditions for determining that the terminal 24 is turned on need to simultaneously meet the determination conditions of single parameters. For example, when the air volume information includes static pressure information and wind speed information, the power distribution valve 22 determines that the terminal 24 is turned on when it detects that the vibration information is greater than or equal to the vibration threshold, the static pressure information is greater than the static pressure threshold, and the wind speed information is greater than the wind speed threshold.

[0063] Reference Figure 1 and Figure 2, optionally, S120, when it is detected that the vibration information is greater than or equal to the vibration threshold, it is determined that the terminal is powered on, including: within a first preset duration, when the ratio of the number of times the vibration information is detected to be greater than or equal to the vibration threshold to the total number of detections is greater than a first preset ratio, it is determined that the terminal is powered on.

[0064] Considering the influence of the external environment and avoiding misjudgment caused by single detection, it can be set that within a set time, that is, within the first preset duration, when the ratio of the number of times the power distribution valve 22 detects that the vibration information is greater than or equal to the vibration threshold to the total number of detections is greater than the first preset ratio, it is determined that the terminal 24 is powered on. Exemplarily, within the first preset duration, if the total number of detections of the power distribution valve 22 is 100 times and the first preset ratio is 0.8, then the power distribution valve 22 will determine that the terminal 24 is powered on only when the number of times the vibration information is detected to be greater than or equal to the vibration threshold is greater than 80 times. In this way, the detection accuracy can be further improved, and the accurate identification of the start-stop signal of the terminal 24 can be realized. Among them, neither the first preset duration nor the first preset ratio is limited, and those skilled in the art can design according to actual needs.

[0065] Figure 4 is a flowchart of another control method for a central range hood system provided by an embodiment of the present invention, as Figure 4 shown, optionally, the control method includes:

[0066] S310, obtain the vibration information at the top of the fan housing in the terminal, and the vibration information includes at least one of vibration velocity, vibration displacement, and vibration acceleration.

[0067] S320, when it is detected that the vibration information is greater than or equal to the vibration threshold, determine that the terminal is powered on.

[0068] S330, generate a power-on message and send the power-on message to the host.

[0069] Refer to Figure 2 , the central range hood system further includes a host 30 arranged at the flue outlet of the common flue 10. The host 30 is a device that forcibly exhausts the oil fume inside the common flue 10 and contains a fan inside. The host 30 can communicate with each power distribution valve 22 located on different floors in a wired or wireless manner. When each power distribution valve 22 determines that the terminal 24 in the corresponding terminal module 20 is powered on, it generates a power-on message and sends the power-on message and the identification information or position information of the power distribution valve 22 itself to the host 30.

[0070] S340, adjust the opening degree of the valve plate according to the valve plate opening instruction fed back by the host.

[0071] After the host 30 receives the startup information sent by all the power distribution valves 22 that identify the startup information of the terminal 24 in the central range hood system and the identification information or position information of the power distribution valve 22 itself, it determines the operating frequency of the host fan based on the startup quantity of the terminals 24 sharing the same common flue 10 and the floor positions where the startup terminals 24 are located (obtained according to the identification information or position information of the power distribution valve 22 itself), and correspondingly generates multiple vane opening commands and feeds them back to the corresponding power distribution valves 22 to adjust the vane opening degrees of the startup power distribution valves 22 and the air volume of the corresponding terminals 24, thereby improving the smoke exhaust performance of the central range hood system and enhancing the user experience.

[0072] Reference Figure 4 , Optionally, the control method further includes:

[0073] S350. When it is detected that the vibration information is less than the vibration threshold, it is determined that the terminal shuts down.

[0074] S360. Generate shutdown information and send the shutdown information to the host.

[0075] S370. Control the vane to close according to the vane closing command fed back by the host.

[0076] Reference Figure 2 , When each power distribution valve 22 detects that the vibration information of the fan housing is less than the vibration threshold, it determines that the terminal 24 shuts down, generates shutdown information, and sends the shutdown information and the identification information or position information of the power distribution valve 22 itself to the host 30. After the host 30 receives the shutdown information sent by each power distribution valve 22 and the identification information or position information of the power distribution valve 22 itself, it correspondingly generates multiple vane closing commands and feeds them back to the corresponding power distribution valves 22 to control the power distribution valves 22 to close the vanes, so that when the fan of the terminal 24 is in a non-operating condition, the corresponding power distribution valve 22 is in a closed state, preventing oil fume backflow and reducing the energy consumption of the central range hood system at the same time. In this way, the precise linkage between each power distribution valve 22 and the corresponding terminal 24 in the central range hood system can be realized, so that when the fan of the terminal 24 starts, the power distribution valve 22 opens and has a corresponding vane opening degree; when the terminal 24 is in a non-startup condition, the power distribution valve 22 is in a closed state.

[0077] It can be understood that, in order to filter out environmental interference and improve the detection accuracy, the power distribution valve 22 can also obtain air volume information such as static pressure information, wind speed information, and pendulum acceleration inside the air duct 21 through the air volume sensor 25, and determine that the terminal 24 shuts down when it detects that any one of the vibration information is less than the vibration threshold and the wind speed information is less than or equal to the wind speed threshold.

[0078] Figure 5It is a flowchart of another control method for a central range hood system provided by an embodiment of the present invention. As Figure 5 shown, optionally, the control method includes:

[0079] S410. Obtain the vibration information at the top of the fan housing in the terminal, where the vibration information includes at least one of vibration velocity, vibration displacement, and vibration acceleration.

[0080] S420. When it is detected that the vibration information is greater than or equal to the vibration threshold, determine that the terminal is powered on.

[0081] S430. Within a second preset duration, when the ratio of the number of times that the vibration information obtained in the later acquisition is greater than the vibration information obtained in the previous acquisition to the total number of comparisons is greater than a second preset ratio, determine that the gear of the terminal is increased.

[0082] The central range hood system provided by the embodiment of the present invention can also accurately identify the gear change signal of the terminal 24. Specifically, within a second preset duration, if the power distribution valve 22 detects an increase in the vibration information, it is determined that the gear of the terminal 24 is increased, and vice versa. That is, each time the power distribution valve 22 obtains the vibration information of the fan housing, it will compare the vibration information obtained in the later acquisition with the vibration information obtained in the previous acquisition. When the ratio of the number of times that the vibration information obtained in the later acquisition is greater than the vibration information obtained in the previous acquisition to the total number of comparisons is greater than a second preset ratio, it is determined that the gear of the terminal 24 is increased; when the ratio of the number of times that the vibration information obtained in the later acquisition is greater than the vibration information obtained in the previous acquisition to the total number of comparisons is less than or equal to the second preset ratio, it is determined that the gear of the terminal 24 is decreased. Among them, neither the second preset duration nor the second preset ratio is limited, and those skilled in the art can design according to actual needs.

[0083] It can be understood that, in order to further improve the recognition accuracy of the gear change of the terminal 24, the power distribution valve 22 can also obtain the air volume information such as the static pressure information, wind speed information, and pendulum acceleration inside the air duct 21 through the air volume sensor 25, and within a second preset duration, when it is detected that the vibration information increases and the air volume information also increases, it is determined that the gear of the terminal 24 is increased, and vice versa, it is determined that the gear of the terminal 24 is decreased.

[0084] To facilitate understanding of the control method for the central range hood system provided by the embodiment of the present invention, based on the above description, a specific control method is provided below. Exemplarily, Figure 6 It is a flowchart of another control method for a central range hood system provided by an embodiment of the present invention. Figure 6 For the related content, reference can be made to the above, and details will not be described here again.

[0085] Based on the same inventive concept, an embodiment of the present invention further provides a central range hood system. Refer to Figure 2 , the central range hood system includes: a common flue 10 and a plurality of terminal unit modules 20; the terminal unit module 20 includes an air duct 21, a power distribution valve 22, a vibration sensor 23, and a terminal unit 24; the common flue 10 is provided with a plurality of flue inlets, and one flue inlet is connected to the air duct outlet of one air duct 21; the power distribution valve 22 is installed at the flue inlet, and the power distribution valve 22 is connected to the terminal unit 24 through the air duct 21; the vibration sensor 23 is located at the top of the fan housing in the terminal unit 24; the vibration sensor 23 is electrically connected to the power distribution valve 22, and the vibration sensor 23 collects the vibration information at the top of the fan housing and sends the vibration information to the power distribution valve 22; wherein, the vibration information includes at least one of vibration velocity, vibration displacement, and vibration acceleration; the power distribution valve 22 receives the vibration information, and when it detects that the vibration information is greater than or equal to the vibration threshold, it determines that the terminal unit 24 is turned on.

[0086] Specifically, each terminal unit module 20 is located on a different floor and is connected to the common flue 10 through a flue inlet. Each terminal unit module 20 is provided with a terminal unit 24 and a power distribution valve 22. The terminal unit 24 can be an exhaust appliance such as a range hood or an integrated stove. The power distribution valve 22 is an appliance installed at the flue inlet at the exhaust air duct outlet of the terminal unit 24 to adjust the air volume of the terminal unit 24. The terminal unit 24 is provided with a fan. When the terminal unit 24 operates, the fan rotates, which will cause different degrees of vibration in the fan housing of the terminal unit 24, that is, as the operating gear of the terminal unit 24 increases, the vibration information at the top of the fan housing will also increase. The vibration sensor 23 can collect the vibration information at the top of the fan housing in real time, so that the power distribution valve 22 can judge whether the terminal unit 24 is turned on according to the vibration information.

[0087] The central range hood system provided by the embodiment of the present invention utilizes the fact that the fan housing will generate different degrees of vibration when the terminal unit operates, and detects the on-off situation of the terminal unit according to the vibration information at the top of the fan housing, can accurately identify the start-stop signal of the terminal unit fan, realize the precise linkage between the power distribution valve and the terminal unit, ensure the normal operation of the central range hood system, and improve the user experience.

[0088] Refer to Figure 2, optionally, the terminal module 20 further includes an air volume sensor 25, which is installed inside the air duct 21 and located between the power distribution valve 22 and the terminal 24; the air volume sensor 25 is electrically connected to the power distribution valve 22, and the air volume sensor 25 collects the air volume information inside the air duct 21 and sends the air volume information to the power distribution valve 22; the power distribution valve 22 receives the vibration information and the air volume information, and determines that the terminal 24 is turned on when it detects that the vibration information is greater than or equal to the vibration threshold and the air volume information is greater than the air volume threshold.

[0089] As the operating gear of the terminal 25 increases, the degree of gas flow inside the air duct 21 increases, and the air volume information such as air pressure or wind speed will also increase accordingly. The power distribution valve 22 can determine whether the terminal 24 is turned on by combining the vibration information of the fan housing and the air volume information inside the air duct 21. By using the method of double-dimensional detection of vibration information and air volume information, external environmental interference can be filtered out, and the detection accuracy can be further improved. Among them, the air volume information may include at least one of static pressure information, wind speed information, and pendulum acceleration.

[0090] Reference Figure 2 , optionally, the central range hood system further includes a main unit 30; the main unit 30 is installed at the flue outlet of the common flue 10, and the main unit 30 is communicatively connected to the power distribution valve 22; when the power distribution valve 22 determines that the terminal 24 is turned on, it generates a turn-on information and sends the turn-on information to the main unit 30; the main unit 30 receives the turn-on information sent by all the power distribution valves 22, and correspondingly generates a plurality of valve opening commands according to the plurality of turn-on information, so as to control the valve opening degree of the corresponding power distribution valve 22 through the valve opening commands.

[0091] The main unit 30 is a device that forcibly exhausts the oil fume inside the common flue 10 and contains a fan inside. The main unit 30 can communicate with each power distribution valve 22 located on different floors in a wired or wireless manner. The power distribution valve 22 generates turn-on information when it determines that the terminal 24 in the corresponding terminal module 20 is turned on; and generates turn-off information when it determines that the terminal 24 is turned off. Each power distribution valve 22 sends the turn-on information or turn-off information of the corresponding terminal 24, as well as the identification information or position information of the power distribution valve 22 itself to the main unit 30. The main unit 30 determines the operating frequency of the main unit fan according to the number of turned-on terminals 24 sharing the same common flue 10 and the floor positions of the turned-on terminals 24, and correspondingly generates a plurality of valve opening commands and valve closing commands and feeds them back to the corresponding power distribution valves 22, so that when the fan of the terminal 24 starts, the power distribution valve 22 opens and has a corresponding valve opening degree; when the terminal 24 is in a non-opening working condition, the power distribution valve 22 is in a closed state, realizing the precise linkage between each power distribution valve 22 and the corresponding terminal 24 in the central range hood system.

[0092] Note that the above is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments, combinations with each other, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A control method for a central range hood system, characterized in that, Including: Obtaining vibration information at the top of the fan box in the terminal, where the vibration information includes at least one of vibration velocity, vibration displacement, and vibration acceleration; When it is detected that the vibration information is greater than or equal to the vibration threshold, determining that the terminal is powered on; The step of determining that the terminal is powered on when it is detected that the vibration information is greater than or equal to the vibration threshold includes: When, within a first preset time period, the ratio of the number of times the vibration information is detected to be greater than or equal to the vibration threshold to the total number of detections is greater than a first preset ratio, determining that the terminal is powered on.

2. The control method according to claim 1, characterized in that After obtaining the vibration information at the top of the fan box in the terminal, it further includes: Obtaining the air volume information inside the air duct of the terminal; When it is detected that the vibration information is greater than or equal to the vibration threshold and the air volume information is greater than the air volume threshold, determining that the terminal is powered on.

3. The control method according to claim 2, characterized in that The air volume information includes at least one of static pressure information, wind speed information, and pendulum acceleration; The step of obtaining the air volume information inside the air duct of the terminal includes: Obtaining the static pressure information inside the air duct of the terminal; and / or, Obtaining the wind speed information inside the air duct of the terminal; and / or, Obtaining the pendulum acceleration inside the air duct of the terminal.

4. The control method according to claim 1, characterized in that After determining that the terminal is powered on, it further includes: Generating a power-on message and sending the power-on message to the host; Adjusting the valve plate opening according to the valve plate opening instruction feedback by the host.

5. The control method according to claim 1, wherein It also includes: When it is detected that the vibration information is less than the vibration threshold, determining that the terminal is powered off.

6. The control method according to claim 5, characterized in that After determining that the terminal is powered off, it further includes: Generating a power-off message and sending the power-off message to the host; Controlling the valve plate to close according to the valve plate closing instruction feedback by the host.

7. The control method according to claim 1, wherein It also includes: When, within a second preset time period, the ratio of the number of times the vibration information obtained in the later acquisition is greater than the vibration information obtained in the previous acquisition to the total number of comparisons is greater than a second preset ratio, determining that the gear of the terminal is increased.

8. A central range hood system, characterized in that, Including multiple terminal modules, where the terminal module includes an air duct, a power distribution valve, a vibration sensor, and a terminal; The vibration sensor is electrically connected to the power distribution valve. The vibration sensor collects the vibration information at the top of the fan box and sends the vibration information to the power distribution valve; where the vibration information includes at least one of vibration velocity, vibration displacement, and vibration acceleration; The power distribution valve receives the vibration information. When it is detected that the vibration information is greater than or equal to the vibration threshold, determining that the terminal is powered on; Wherein, the step of determining that the terminal is powered on when it is detected that the vibration information is greater than or equal to the vibration threshold includes: When, within a first preset time period, the ratio of the number of times the vibration information is detected to be greater than or equal to the vibration threshold to the total number of detections is greater than a first preset ratio, determining that the terminal is powered on.

9. The central range hood system according to claim 8, wherein The terminal module further includes an air volume sensor; The air volume sensor is electrically connected to the power distribution valve. The air volume sensor collects the air volume information inside the air duct and sends the air volume information to the power distribution valve; The power distribution valve receives the vibration information and the air volume information, and determines that the terminal is powered on when it detects that the vibration information is greater than or equal to the vibration threshold and the air volume information is greater than the air volume threshold.

10. The central range hood system according to claim 8, wherein, It further includes a host computer, which is communicatively connected to the power distribution valve; When the power distribution valve determines that the terminal is powered on, it generates power-on information and sends the power-on information to the host computer; The host computer receives the power-on information sent by all the power distribution valves, and generates a plurality of valve opening instructions corresponding to the plurality of power-on information, so as to control the valve opening degree of the corresponding power distribution valve through the valve opening instructions.

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