Control methods for terminal range hoods, terminal range hoods and storage media

Abstract

This application discloses a control method for a terminal range hood, a terminal range hood, and a computer-readable storage medium. The method includes: acquiring the current exhaust air volume and ventilation area of ​​the mesh tray of the terminal range hood; determining the velocity of the oily fumes passing through the mesh tray in the current terminal range hood based on the exhaust air volume and ventilation area; acquiring the mesh tray rotation speed, spoke height, and number of spokes of the current terminal range hood; determining a first time taken for the oily fumes to pass through the mesh tray based on the spoke height and gas velocity; determining a second time taken for the current spoke to move to the next spoke based on the mesh tray rotation speed and number of spokes; using the ratio of the first time and the second time as the current oily fume purification efficiency of the mesh tray of the terminal range hood, and dynamically adjusting the mesh tray oily fume purification efficiency to 100%. This application solves the technical problems of poor oily fume purification efficiency and high purification cost in current central range hood systems.

Description

Technical Field

[0001] This invention relates to the field of intelligent control of range hoods, and more particularly to a control method for a terminal range hood, a terminal range hood, and a computer-readable storage medium. Background Technology

[0002] As people's living standards improve, range hoods have become an essential appliance in every household kitchen. Range hoods generally have different exhaust speeds to meet different ventilation needs in different kitchen scenarios. For example, when cooking soup or steaming food, there is less smoke and less ventilation is needed, so a lower exhaust speed is required; when stir-frying or deep-frying, there is more smoke and more ventilation is needed, so a higher exhaust speed is required.

[0003] However, as urban residential buildings become taller and people's demands for housing comfort increase, newly built urban high-rise residential buildings generally adopt centralized smoke exhaust methods. That is, a building uses a central range hood system. The central range hood system provides overall exhaust suction for the common smoke duct of the entire building, and then allocates the exhaust volume to the terminal range hoods on each floor to achieve the purification of oil fume gas by the terminal range hoods.

[0004] However, current central range hood systems mainly rely on passive filtration of oil fumes through the filters of terminal range hoods or purification by the purification module of the main fan of the central range hood system. This method of oil fume purification is generally inefficient, or it requires high purification capacity from the air purification module of the main fan and has high overall purification costs. Summary of the Invention

[0005] The main purpose of this application is to provide a control method for a terminal range hood, a terminal range hood, and a computer-readable storage medium, aiming to solve the technical problems of poor oil fume purification efficiency and high purification cost of current central range hood systems.

[0006] To achieve the above objectives, this application provides a control method for terminal range hoods. This method is applied to a central fume extraction system, which includes a main fan, terminal range hoods, a power distribution valve, a main control module, and slave controllers. The main fan is located at the top of the building's common flue. Multiple terminal range hoods are located on different floors of the building and connected to the common flue. The power distribution valve is located in the connection channel between each terminal range hood and the common flue. The slave controller is electrically connected to the power distribution valve. The main control module is communicatively connected to both the main fan and the slave controller. The main control module controls the power distribution valve based on the slave controller to dynamically adjust the exhaust airflow of the corresponding terminal range hood. Each terminal range hood includes an exhaust hood connected to the common flue and at least one mesh tray inside the exhaust hood. The mesh tray includes multiple spokes.

[0007] The control method for the terminal range hood includes:

[0008] Obtain the current exhaust air volume of the terminal range hood and the ventilation area of ​​the mesh disk, and determine the current smoke velocity of the oily gas passing through the mesh disk in the terminal range hood based on the exhaust air volume and ventilation area.

[0009] Obtain the current mesh rotation speed, spoke height, and number of spokes of the current terminal range hood;

[0010] Based on the spoke height and the flue gas velocity, determine the first time taken for the oil fume gas to pass through the mesh disk;

[0011] Based on the rotational speed of the mesh disk and the number of spokes, determine the second time taken for the current spoke in the mesh disk to move to the next spoke at this moment;

[0012] The ratio of the first duration to the second duration is used as the current oil fume purification efficiency of the terminal range hood, and the oil fume purification efficiency of the range hood is dynamically adjusted to 100%.

[0013] Optionally, the step of dynamically adjusting the oil fume purification efficiency of the network disk to 100% includes:

[0014] If the oil fume purification efficiency of the network disk is greater than 100%, then output the first prompt message to reduce the rotation speed of the network disk or reduce the rotation speed of the network disk;

[0015] If the oil fume purification efficiency of the network disk is less than 100%, then a second prompt message to increase the network disk rotation speed will be output, or the network disk rotation speed will be increased.

[0016] Optionally, the method further includes:

[0017] If it is detected that the oil fume purification efficiency of the network disk is still less than 100% after increasing the rotation speed of the network disk to the maximum value, a request to reduce the exhaust air volume is sent to the main control module to reduce the smoke velocity.

[0018] Optionally, the step of determining the velocity of the cooking fumes passing through the mesh screen in the current terminal range hood based on the exhaust air volume and ventilation area includes:

[0019] Determine the exhaust air volume Q, the ventilation area S of the mesh tray, and the number X of mesh trays in the exhaust hood of the current terminal range hood;

[0020] The formula V = Q / (X*S) is applied to determine the flue gas velocity V, where V is the flue gas velocity passing through the mesh screen, in meters per second.

[0021] Optionally, the step of determining the first time taken for the oil fume gas to pass through the mesh reel based on the spoke height and the flue gas velocity includes:

[0022] The spoke height H, the smoke velocity V, and the first duration T1 are determined, wherein the unit of spoke height H is millimeters, the unit of smoke velocity V is meters per second, and the unit of first duration T1 is seconds;

[0023] The formula T1 = H / (1000*V) is applied to determine the first time T1 taken for the oil fume gas to pass through the mesh disk.

[0024] Optionally, the step of determining the second time taken for the current spoke in the mesh to move to the next spoke, based on the mesh rotation speed and the number of spokes, includes:

[0025] The rotational speed of the mesh disk is determined to be n, the number of spokes is N, and the second duration is T2, where the unit of the mesh disk rotational speed n is revolutions per minute, the number of spokes N is one, and the unit of the second duration T2 is seconds;

[0026] The formula T2 = 60 / (N*n) is applied to determine the second time T2 required for the current spoke in the mesh disk to move to the next spoke at this moment.

[0027] Optionally, the step of obtaining the current exhaust air volume of the terminal range hood and the ventilation area of ​​the mesh panel includes:

[0028] The current exhaust air volume of the terminal range hood is extracted from the main control module and the controller.

[0029] Obtain the outer diameter D and inner diameter d of the network disk, where the units of the outer diameter D and inner diameter d are both millimeters;

[0030] Applied to the formula S=π(D / 2)-π(d / 2)2, the ventilation area of ​​the network disk S=π(Dd) / 4.

[0031] Optionally, the step of using the ratio of the first duration to the second duration as the current oil fume purification efficiency of the terminal range hood includes:

[0032] The ratio of the first duration to the second duration is used as the initial purification percentage of the current terminal range hood;

[0033] Obtain the cross-sectional area of ​​the windward side and the cross-sectional area of ​​the leeward side of the mesh spokes of the current terminal range hood, and determine the area ratio of the cross-sectional area of ​​the leeward side to the cross-sectional area of ​​the windward side.

[0034] If the area ratio is greater than 1, the primary purification percentage is increased according to the area ratio to obtain the current oil fume purification efficiency of the terminal range hood. The larger the area ratio is, the greater the increase in the primary purification percentage.

[0035] This application also provides a terminal range hood, the terminal range hood comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the terminal range hood as described above.

[0036] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the control method for a terminal range hood as described above.

[0037] This application involves installing a mesh disc inside the exhaust hood of a terminal range hood. The mesh disc is driven to rotate by a motor. First, the exhaust air volume and ventilation area are used to determine the velocity of the cooking fumes passing through the mesh disc. Then, based on the spoke height and the gas velocity, a first time is determined for the cooking fumes to pass through the mesh disc. A second time is determined based on the mesh disc's rotation speed and the number of spokes. The ratio of the first and second times is used as the mesh disc's fume purification efficiency, and the efficiency is dynamically adjusted to 100%. By setting up a network disk and innovatively configuring its associated oil fume purification efficiency, the network disk achieves active filtration of oil fume gases, rather than relying solely on the passive filtration of oil fume gases through a filter screen. This improves the oil fume filtration efficiency of the terminal range hood. Before the oil fume gases enter the public flue, the spokes of the network disk intercept and filter the oil fume gases, avoiding reliance on the purification module of the main fan of the central range hood system for purification. This reduces the requirements for the air purification module of the main fan, eliminating the need for a high-efficiency and high-cost air purification module, and significantly reducing the cost of oil fume purification. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the frame structure of an embodiment of the central fume extraction system involved in the present application.

[0041] Figure 2 This is a front-view structural diagram of an embodiment of the terminal range hood involved in this application;

[0042] Figure 3 This is a perspective view of one embodiment of the range hood involved in this application.

[0043] Figure 4 for Figure 3 A magnified view of a portion of region Q in the middle;

[0044] Figure 5 This is a schematic diagram of the network disk in the terminal range hood involved in this application from one perspective;

[0045] Figure 6 This is a structural schematic diagram of the network disk in the terminal range hood involved in this application from another perspective;

[0046] Figure 7 This is another structural schematic diagram of the network disk in the terminal range hood involved in this application;

[0047] Figure 8 This is a schematic diagram illustrating the scenario of purifying and filtering oily fumes using a cloud storage service in this application.

[0048] Figure 9 This is a flowchart illustrating an embodiment of the control method for a terminal range hood in this application;

[0049] Figure 10 This is a schematic diagram of the frame structure of the terminal range hood involved in the embodiments of this application.

[0050] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Reference Figure 1 , Figure 1 This is a schematic diagram of the framework structure of the central range hood system involved in the embodiments of this application. The central range hood system includes a main fan 1, terminal range hoods 2, a power distribution valve 3, a main control module (not shown in the figure), and a slave controller (not shown in the figure). The main fan 1 is located at the top of the building's common flue 4, and multiple terminal range hoods 2 are located on each floor of the building and connected to the common flue 4. The power distribution valve 3 is located in the connection channel 5 between each terminal range hood 2 and the common flue 4. The slave controller is electrically connected to the power distribution valve 3, and the main control module is communicatively connected to both the main fan 1 and the slave controller. Figure 1 Fn represents the nth floor of the building, and F1 represents the first floor of the building.

[0053] The main fan of a central range hood system is a powerful fan that typically integrates an air purification module. The main fan is installed at the public exhaust duct outlet on the roof of a residential building, providing auxiliary exhaust suction for the public exhaust duct. The air purification module filters and purifies the oily fumes discharged from the public exhaust duct by the main fan, ensuring that the discharged gas meets environmental protection requirements.

[0054] Each kitchen in each renovated suite on each floor is equipped with a terminal range hood. Each terminal range hood is connected to a shared flue. For example, each terminal range hood has its own sub-fan. The terminal range hood includes a body and an exhaust hood; the sub-fan is located within the body, and the exhaust hood is located at the end of the connection channel connecting to the shared flue. A power distribution valve is located in the connection channel. The opening degree of the power distribution valve determines the exhaust volume of the connected terminal range hood. A larger opening degree results in a larger exhaust volume supplied to the terminal range hood, and a smaller opening degree results in a smaller exhaust volume. The opening degree of the power distribution valve is controlled by a slave controller, which is controlled by a master control module. For example, the slave controller and the master control module form a network to achieve mutual communication.

[0055] The main control module can be electronic components such as MCU (Microcontroller Unit) and CPU (Central Processing Unit), and can be installed in the control cabinet or outdoor unit of the central range hood system.

[0056] This application provides a control method for a terminal range hood, which is applied to a central range hood system. (Refer to...) Figure 1 The central fume extraction system includes a main fan 1, terminal range hoods 2, a power distribution valve 3, a main control module (not shown in the figure), and a slave controller (not shown in the figure). The main fan 1 is located at the top of the building's common flue 4. Multiple terminal range hoods 2 are located on different floors of the building and connected to the common flue 4. The power distribution valve 3 is located in the connection channel between each terminal range hood 2 and the common flue 4. The slave controller is electrically connected to the power distribution valve 3. The main control module is communicatively connected to both the main fan 1 and the slave controller. The main control module controls the power distribution valve 3 based on the slave controller to dynamically adjust the exhaust air volume of the corresponding terminal range hood 2. Each terminal range hood 2 includes an exhaust hood connecting to the common flue 4 and at least one mesh tray inside the exhaust hood. The mesh tray includes multiple spokes. The control method for the terminal range hoods is applied to the main control module, as shown in the figure. Figure 9 The control method for the terminal range hood includes:

[0057] Step S10: Obtain the current exhaust air volume of the terminal range hood and the ventilation area of ​​the mesh disk, and determine the current smoke velocity of the oil fume gas passing through the mesh disk in the terminal range hood based on the exhaust air volume and ventilation area.

[0058] Current central range hood systems typically determine the overall exhaust volume requirement of the system based on the operating rate or number of terminal range hoods in each residential kitchen on each floor. This exhaust volume requirement is then evenly distributed among the range hoods in each operating kitchen. The opening degree of the power distribution valve of the operating terminal range hood is adjusted to allocate exhaust volume to the terminal range hood.

[0059] One or more mesh trays can be installed inside the exhaust hood of a terminal range hood. The number of mesh trays can be adjusted according to the size of the exhaust hood. For example, if the exhaust hood needs to cover two cooktops, two mesh trays can be installed inside the hood at positions corresponding to the two cooktops. Each mesh tray is equipped with a motor to drive its rotation, and the mesh trays filter out a certain amount of the passing fumes.

[0060] For example, when multiple mesh trays are installed inside the exhaust hood of a terminal range hood, an air outlet is provided at one end of the exhaust hood, and the air outlet connects to the common flue via the connecting passage of this floor. To ensure that the gas flow velocity (i.e., the velocity of the flue gas passing through the mesh tray) is the same at each mesh tray on a single terminal range hood, an air distribution structure is set on the leeward side of the mesh tray. The mesh tray closer to the air outlet has a smaller air distribution opening in the air distribution structure; the mesh tray farther from the air outlet has a larger air distribution opening in the air distribution structure. (Refer to...) Figure 2The terminal range hood 2 includes a smoke hood 21, within which multiple mesh trays 22 are installed, and the air outlet is located on the back of the smoke hood 21. (See reference...) Figure 3 , Figure 3 A smoke exhaust hood 21 is concealed within, while the air outlet 24 is visible. Each mesh tray 22 is equipped with an air distribution structure 23, which includes a motor that drives the mesh tray 22 to rotate. (See reference) Figure 4 , Figure 4 Bit Figure 3 A magnified view of a portion of the Q region, showing the rotation of the motor-driven mesh disk 22 in the wind distribution structure 23.

[0061] Specifically, after the exhaust air volume allocated to the terminal range hood, the larger the ventilation area of ​​the mesh tray, the lower the velocity of the oily fumes passing through the mesh tray in the current terminal range hood; the smaller the ventilation area of ​​the mesh tray, the higher the velocity of the oily fumes passing through the mesh tray in the current terminal range hood.

[0062] Step S20: Obtain the mesh rotation speed, spoke height, and number of spokes of the current terminal range hood.

[0063] The specifications and models of the current range hood's mesh tray can be queried and obtained by associating the model of the range hood with the mesh tray's rotation speed, spoke height, and number of spokes. The mesh tray rotation speed is the initial default speed, the spoke height is the distance from the windward side to the leeward side of the mesh tray, and the number of spokes is the total number of spokes designed in a mesh tray.

[0064] Step S30: Determine the first time taken for the oil fume gas to pass through the mesh disk based on the spoke height and the flue gas velocity;

[0065] The first duration is the time it takes for the oily fumes to travel from the windward side of the mesh disk to the leeward side (i.e., the spoke height) at the speed of the fumes; that is, the first duration is the time required for the oily fumes to pass through the mesh disk.

[0066] Step S40: Based on the rotational speed of the mesh disk and the number of spokes, determine the second time taken for the current spoke in the mesh disk to move to the next spoke at this moment;

[0067] Based on the number of spokes, we can determine how many spoke gaps the disk is divided into. The spokes are evenly distributed on the disk, and the gaps between them are at fixed angles. Then, based on the disk's rotational speed, we can determine the angular velocity of the spokes, and thus calculate the second time it takes for any current spoke to move to the position of the next spoke. That is, the second time is the time it takes for a spoke on the disk to rotate through one spoke gap at the stated angular velocity. (Refer to...) Figure 5 and Figure 6 Multiple spokes 221 are evenly arranged in the cloud drive 22. (Refer to Figure 8.) Figure 8The bottom contains cooking fumes, which then rise from... Figure 8 The flow moves from bottom to top. The trapezoidal block is the cross-section of the spokes 221 of the mesh disk 22. Specifically, it is the cross-section of the spokes 221 along the direction of the oil fume gas flow. Multiple spokes 221 rotate in the direction of number 1-number 2-number 3...-number 7-number 8, that is, they rotate along the spokes 221 along the rotation direction of the mesh disk. The second duration is... Figure 8 The time taken for spoke 221 of serial number 1 to move to the position of spoke 221 of serial number 2, the first duration is the time taken for the oil fume gas to move from the short side to the long side of the trapezoidal spoke 221.

[0068] Step S50: The ratio of the first duration to the second duration is used as the current oil fume purification efficiency of the terminal range hood, and the oil fume purification efficiency of the range hood is dynamically adjusted to 100%.

[0069] The first time interval is the time required for the oily fumes to pass through the mesh tray, and the second time interval is the time it takes for the spokes of the mesh tray to rotate through a gap between the spokes. If the first time interval is longer than the second time interval, it means that the time it takes for the oily fumes to pass through the gap between the spokes is greater than the time it takes for the spokes to rotate through that gap. This indicates that the oily fumes were intercepted by the spokes before they could pass through the gap, and therefore cannot pass through the mesh tray. In this case, the mesh tray's oily fume purification efficiency reaches 100%.

[0070] For example, the ratio of the first duration to the second duration can be directly used as the current oil fume purification efficiency of the terminal range hood. The maximum value of the oil fume purification efficiency is 100%. The oil fume purification efficiency can be dynamically displayed on the display panel of the terminal range hood to inform the user of the oil fume purification status in a timely manner.

[0071] According to the definition of oil fume purification efficiency in cloud storage, the smaller the second time when the first time duration remains constant, or the larger the first time duration when the second time duration remains constant, the greater the oil fume purification efficiency of the cloud storage. Therefore, dynamically adjusting the oil fume purification efficiency of the cloud storage to 100% can increase the first time duration or decrease the second time duration.

[0072] For example, increasing the first duration may include: increasing the spoke height and / or decreasing the flue gas velocity; decreasing the second duration may involve increasing the rotational speed of the mesh reel and increasing the number of spokes in the mesh (i.e., making the spokes more densely packed).

[0073] In this embodiment, a mesh disk is installed inside the exhaust hood of the terminal range hood. The mesh disk can be driven to rotate by a motor. First, the velocity of the oily gas passing through the mesh disk in the terminal range hood is determined by the exhaust air volume and ventilation area. Then, based on the spoke height and the gas velocity, the first time taken for the oily gas to pass through the mesh disk is determined. Furthermore, based on the mesh disk rotation speed and the number of spokes, the second time taken for the current spoke to move to the next spoke is determined. The ratio of the first time and the second time is used as the current oily gas purification efficiency of the terminal range hood's mesh disk, and the oily gas purification efficiency of the mesh disk is dynamically adjusted synchronously to 100%. By setting up a network disk and innovatively configuring its associated oil fume purification efficiency, the network disk achieves active filtration of oil fume gases, rather than relying solely on the passive filtration of oil fume gases through a filter screen. This improves the oil fume filtration efficiency of the terminal range hood. Before the oil fume gases enter the public flue, the spokes of the network disk intercept and filter the oil fume gases, avoiding reliance on the purification module of the main fan of the central range hood system for purification. This reduces the requirements for the air purification module of the main fan, eliminating the need for a high-efficiency and high-cost air purification module, and significantly reducing the cost of oil fume purification.

[0074] Furthermore, in another embodiment of the control method for the terminal range hood of this application, the step of dynamically adjusting the oil fume purification efficiency of the mesh disk to 100% in step S50 includes:

[0075] Step A1: If the oil fume purification efficiency of the mesh disk is greater than 100%, then output a first prompt message to reduce the mesh disk speed or reduce the mesh disk speed.

[0076] If the real-time fume purification efficiency of the mesh disk is detected to be greater than 100%, the first time duration can be reduced, or the second time duration can be increased. Generally speaking, the specifications of the mesh disk and the setting of the spokes cannot be changed, so adjustments to the mesh disk structure are not considered. Reducing the first time duration would increase the flue gas velocity, requiring an increase in the speed of the main fan or the terminal range hood, which increases costs and is unnecessary. Increasing the second time duration would reduce the mesh disk speed, reducing the energy consumption of driving the mesh disk to rotate. Therefore, when the fume purification efficiency of the mesh disk is greater than 100%, a first prompt message to reduce the mesh disk speed or the mesh disk speed can be output to reduce the fume purification efficiency of the mesh disk, thereby reducing the mesh disk speed while ensuring the purification efficiency of the fume gas and avoiding unnecessary energy waste.

[0077] Step A2: If the oil fume purification efficiency of the mesh disk is less than 100%, then output a second prompt message to increase the mesh disk rotation speed or increase the mesh disk rotation speed.

[0078] If the real-time fume purification efficiency of the mesh disk is less than 100%, it indicates that the fume purification is incomplete. The first time interval can be increased, or the second time interval can be decreased. Since the mesh disk specifications and spoke settings cannot be changed, adjustments to the mesh disk structure are not considered. Therefore, increasing the first time interval can reduce the fume velocity, but it may cause the fume to be discharged from the kitchen in a timely manner. It is not advisable to directly reduce the exhaust air volume to reduce the fume velocity. Decreasing the second time interval can increase the mesh disk rotation speed, thereby improving the fume purification efficiency of the mesh disk at a low cost and strengthening the interception and filtration of the passing fume.

[0079] Optionally, the control method for the terminal range hood further includes:

[0080] Step A3: If it is detected that the oil fume purification efficiency of the network disk is still less than 100% after increasing the rotation speed of the network disk to the maximum value, a request to reduce the exhaust air volume is sent to the main control module to reduce the smoke velocity.

[0081] The mesh screen has a maximum rotation speed limit. If, after increasing the mesh screen rotation speed to its maximum, the mesh screen's fume purification efficiency is still less than 100%, it indicates that the flue gas velocity is too high, affecting the purification and filtration efficiency of the fume gas. In this case, the controller sends a request to the main control module to reduce the exhaust air volume. The main control module reduces the overall exhaust air volume of the main fan or reduces the opening of the power distribution valve of this terminal range hood, thereby reducing the exhaust air volume of this terminal range hood. This reduces the flue gas velocity while maintaining the same ventilation area, sacrificing some exhaust air volume to improve the mesh screen's fume purification efficiency. Furthermore, if the overall exhaust air volume of the terminal range hood is insufficient—that is, after reducing the exhaust air volume of the terminal range hood, the fume concentration in the environment where the terminal range hood is located (such as the kitchen) exceeds the preset fume concentration threshold—it indicates that the demand for fume removal exceeds the demand for fume purification efficiency. In this case, the main control module can increase the exhaust air volume, increasing the flue gas velocity, sacrificing some mesh screen fume purification efficiency to increase the overall exhaust air volume of the terminal range hood. In addition, the main control module can appropriately reduce the exhaust air volume and reduce the smoke velocity after the oil fume concentration in the environment where the terminal range hood is located (such as the kitchen) is less than the preset oil fume concentration threshold, thereby improving the oil fume purification efficiency of the network disk.

[0082] Furthermore, in another embodiment of the control method for the terminal range hood of this application, step S10, determining the velocity of the oily smoke gas passing through the mesh disk in the current terminal range hood based on the exhaust air volume and ventilation area, includes:

[0083] Step B1: Determine the exhaust air volume Q, the ventilation area S of the mesh tray, and the number X of mesh trays in the exhaust hood of the current terminal range hood;

[0084] Step B2, apply the formula V=Q / (X*S) to determine the flue gas velocity V, where V is the flue gas velocity passing through the mesh disk, in meters per second.

[0085] In this embodiment, the exhaust air volume Q is the total exhaust air volume allocated to this terminal range hood by the main control module, the ventilation area is the total area of ​​multiple mesh panels, and the wind speed is the quotient of the air volume and the ventilation area. The velocity of the oily smoke passing through the mesh panels can be calculated. The unit of exhaust air volume Q is cubic meters, the unit of ventilation area S is square meters, and the unit of number of mesh panels X is units.

[0086] Optionally, step S30, based on the spoke height and the flue gas velocity, determines the first time taken for the oil fume gas to pass through the mesh reel, including:

[0087] Step C1: Determine the spoke height H, the smoke velocity V, and the first duration T1, wherein the spoke height H is in millimeters, the smoke velocity V is in meters per second, and the first duration T1 is in seconds;

[0088] Step C2 is applied to the formula T1=H / (1000*V) to determine the first time T1 taken for the oil fume gas to pass through the mesh disk.

[0089] The main control module contains specification data for the mesh trays of various types of terminal range hoods. Based on the model of the terminal range hood, the specifications of the mesh tray can be determined, leading to the number of spokes, their height (H in millimeters), the gas velocity (V in meters per second), and the first time interval (T1 in seconds). By dividing the spoke height (H) by the gas velocity (V), the first time interval (T1) taken for the fumes to travel from the windward side to the leeward side of the mesh tray (i.e., through the mesh tray) can be calculated, indicating how long it takes for the fumes to pass through the mesh tray. (Refer to...) Figure 7 The side of the network disk 22 facing the direction of the oil fumes is the windward side, and the side away from the direction of the oil fumes is the leeward side. The oil fumes enter from the windward side of the network disk 22 and exit from the leeward side of the network disk 22.

[0090] Optionally, step S40, based on the rotational speed of the reel and the number of spokes, determines the second time taken for the current spoke in the reel to move to the next spoke, including:

[0091] Step D1: Determine the mesh disk rotation speed as n, the number of spokes as N, and the second duration as T2, where the mesh disk rotation speed n is in revolutions per minute, the number of spokes N is in units, and the second duration T2 is in seconds;

[0092] Step D2 is applied to the formula T2 = 60 / (N*n) to determine the second time T2 taken for the current spoke in the mesh disk to move to the next spoke at this moment.

[0093] The rotational speed n of the disk is n revolutions per minute, and the number of spokes N is N spokes evenly spaced in the disk. The time for the disk to complete one revolution is 60 / n. Since the disk is divided into N spokes with intervals between them, the time for the disk to rotate between the intervals of one spoke is 60 / (N*n). Therefore, the second time T2 taken for the current spoke to move to the next spoke is 60 / (N*n).

[0094] In this embodiment, by calculating the first duration T1 = H / (1000*V) and T2 = 60 / (N*n), the oil fume purification efficiency of the mesh disk is T1 / T2, and then the oil fume purification efficiency of the mesh disk is: H*N*n / 60000*V. The oil fume purification efficiency of the mesh disk is positively correlated with the mesh disk rotation speed n, while the number of spokes N and the spoke height H are constant values. The oil fume purification efficiency of the mesh disk is negatively correlated with the flue gas velocity V. The oil fume purification efficiency of the mesh disk can be improved by increasing the mesh disk rotation speed n or decreasing the flue gas velocity V.

[0095] Optionally, obtaining the current exhaust air volume of the terminal range hood and the ventilation area of ​​the mesh panel in step S10 includes:

[0096] Step E1: Extract the current exhaust air volume of the terminal range hood from the main control module and the controller;

[0097] The main control module controls the overall exhaust air volume of the main fan. The controller controls the exhaust air volume of each activated terminal range hood by controlling the opening of the power distribution valve. The current exhaust air volume of the terminal range hood can be extracted from the main control module and the slave controller. This current exhaust air volume of the terminal range hood is the exhaust air volume after passing through the mesh plate inside the exhaust hood.

[0098] Step E2: Obtain the outer diameter D and inner diameter d of the network disk, where the units of the outer diameter D and inner diameter d are both millimeters;

[0099] Step E3, applied to the formula S=π(D / 2)-π(d / 2)2, the ventilation area of ​​the network disk S=π(D

[0100] -d) / 4.

[0101] In some optional embodiments, the center of the mesh disk is a connecting part for the motor. This connecting part is generally not ventilated, and its radius is the inner diameter d of the mesh disk. The actual passage area of ​​the mesh disk is the annular area excluding the connecting part. Therefore, the ventilation area S of the mesh disk is π(D / 2) - π(d / 2)², and further, the ventilation area S is π(Dd) / 4. (Refer to...) Figure 6 The outer diameter D of the network disk is twice the distance from the outer edge 223 of the network disk 221 to the geometric center of the network disk 221, and the inner diameter d of the network disk is the diameter of the central region 222 of the network disk 221.

[0102] Furthermore, in another embodiment of the control method for the terminal range hood in this application, step S50, which uses the ratio of the first duration to the second duration as the current oil fume purification efficiency of the terminal range hood, includes:

[0103] Step F1: Use the ratio of the first duration to the second duration as the current primary purification percentage of the terminal range hood;

[0104] Step F2: Obtain the cross-sectional area of ​​the windward side and the cross-sectional area of ​​the leeward side of the mesh spokes of the current terminal range hood, and determine the area ratio of the cross-sectional area of ​​the leeward side to the cross-sectional area of ​​the windward side.

[0105] Step F3: If the area ratio is greater than 1, the primary purification percentage is increased according to the area ratio to obtain the current oil fume purification efficiency of the terminal range hood. The larger the area ratio is than 1, the greater the increase in the primary purification percentage.

[0106] In this embodiment, among the factors affecting the fume purification efficiency of the range hood's mesh panel, besides the first and second time durations (i.e., the fume purification efficiency is related to the flue gas velocity associated with the first time duration and the mesh panel rotation speed associated with the second time duration), it is also related to the cross-sectional shape of the mesh panel in the air inlet direction. Specifically, the fume purification efficiency is related to the windward and leeward areas of the mesh panel spokes. This is because for the same spoke, if the leeward area of ​​the cross-section along the air inlet direction is greater than the windward area, it indicates that the fume gas, after entering from the windward side of the spoke, touches the leeward side of the spoke before traversing the entire height of the spoke. The time taken for the fume gas to pass through the spokes of the mesh panel is less than the first time duration. Therefore, when the area ratio of the leeward to the windward cross-section is greater than 1, the primary purification percentage is increased according to this area ratio. The larger the area ratio, the greater the increase in the primary purification percentage, thus obtaining the current fume purification efficiency of the range hood's mesh panel, achieving structural improvements to enhance the fume purification efficiency.

[0107] Furthermore, this application also provides a terminal range hood, the terminal range hood comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the terminal range hood as described above.

[0108] Specifically, refer to Figure 10 , Figure 10 This is a schematic diagram of the frame structure of the terminal range hood involved in the embodiments of this application.

[0109] like Figure 10As shown, the terminal range hood may include: a processor 1001 (i.e., the main control module), such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface. The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. Alternatively, the memory 1005 may be a storage device independent of the aforementioned processor 1001.

[0110] Those skilled in the art will understand that Figure 10 The structure shown does not constitute a limitation on the terminal range hood, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0111] like Figure 10 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and computer programs.

[0112] exist Figure 10 In the terminal range hood shown, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and memory 1005 in the terminal range hood of the present invention can be set in the terminal range hood, and the terminal range hood calls the computer program stored in the memory 1005 through the processor 1001 and executes the control method of the terminal range hood provided in the embodiments of the present invention.

[0113] Furthermore, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described control method for a terminal range hood.

[0114] The technical extensions and derivations of the technical effects related to the terminal range hood and computer-readable storage medium in this application are basically the same as the various embodiments of the control method of the terminal range hood described above, and therefore will not be repeated.

[0115] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent scope of this application.

Claims

1. A control method of a terminal hood, characterized by, The control method of the terminal range hood is applied to a central range hood system, the central range hood system comprising a main fan, a terminal range hood, a power distribution valve, a master control module and a slave controller, the main fan being arranged at the top of a public flue of a building, a plurality of terminal range hoods being arranged on each floor of the building and being connected to the public flue, the power distribution valve being arranged in a connecting passage between each terminal range hood and the public flue, the slave controller being electrically connected to the power distribution valve, and the master control module being communicatively connected to the main fan and the slave controller; the master control module controls the power distribution valve based on the slave controller to dynamically adjust the exhaust air volume of the corresponding terminal range hood; the terminal range hood comprises an exhaust hood connected to the connecting passage of the public flue and at least one mesh disc arranged in the exhaust hood; the mesh disc comprises a plurality of spokes. The control method of the terminal range hood comprises: obtaining the current exhaust air volume of the terminal range hood and the ventilation area of the mesh disc, and determining the flue gas speed of the oil fume gas passing through the mesh disc in the current terminal range hood according to the exhaust air volume and the ventilation area; obtaining the mesh disc rotating speed, the spoke height and the number of spokes of the mesh disc of the current terminal range hood; determining the first time length consumed by the oil fume gas passing through the mesh disc according to the spoke height and the flue gas speed; determining the second time length consumed by the current spoke moving to the next spoke at this moment according to the mesh disc rotating speed and the number of spokes; taking the ratio of the first time length and the second time length as the mesh disc oil fume purification efficiency of the current terminal range hood, and dynamically adjusting the mesh disc oil fume purification efficiency to 100%.

2. The control method of a terminal hood according to claim 1, characterized in that, The step of outputting the dynamically adjusted mesh disc oil fume purification efficiency to 100% comprises: if the mesh disc oil fume purification efficiency is greater than 100%, outputting first prompt information of reducing the mesh disc rotating speed or reducing the mesh disc rotating speed; if the mesh disc oil fume purification efficiency is less than 100%, outputting second prompt information of increasing the mesh disc rotating speed or increasing the mesh disc rotating speed.

3. The control method of a terminal hood according to claim 2, characterized in that, The method further comprises: if it is detected that the mesh disc oil fume purification efficiency is still less than 100% after increasing the mesh disc rotating speed to the maximum value, sending a request of reducing the exhaust air volume to the master control module to reduce the flue gas speed.

4. The control method of a terminal hood according to claim 3, characterized in that, The step of determining the flue gas speed of the oil fume gas passing through the mesh disc in the current terminal range hood according to the exhaust air volume and the ventilation area comprises: determining the exhaust air volume Q, the ventilation area S of the mesh disc, and the number X of mesh discs in the exhaust hood of the current terminal range hood; applying the formula V=Q / (X*S) to determine the flue gas speed V, wherein V is the flue gas speed of the oil fume gas passing through the mesh disc, and the unit is meter / second.

5. The control method of a terminal hood according to claim 4, characterized in that, The step of determining the first time length consumed by the oil fume gas passing through the mesh disc according to the spoke height and the flue gas speed comprises: determining the spoke height H, the flue gas speed V and the first time length T1, wherein the unit of the spoke height H is millimeter, the unit of the flue gas speed V is meter / second, and the unit of the first time length T1 is second; The first time length T1 consumed by the oil fume gas passing through the mesh disc is determined by applying the formula T1=H / (1000*V).

6. The control method of a terminal hood according to claim 5, characterized in that, The step of determining the second time length consumed by the current spoke in the mesh disc to move to the next spoke at this moment according to the mesh disc rotating speed and the spoke number comprises: The mesh disc rotating speed n is determined as n, the spoke number N is determined as N, and the second time length T2 is determined as T2, wherein the unit of the mesh disc rotating speed n is revolutions per minute, the unit of the spoke number N is pieces, and the unit of the second time length T2 is seconds. The second time length T2 consumed by the current spoke in the mesh disc to move to the next spoke at this moment is determined by applying the formula T2=60 / (N*n).

7. The control method of a terminal hood according to claim 6, characterized in that, The step of obtaining the current terminal oil fume extractor exhaust air volume and the ventilation area of the mesh disc comprises: The current terminal oil fume extractor exhaust air volume is extracted from the master control module and the slave controller. The outer diameter D and the inner diameter d of the mesh disc are obtained, wherein the unit of the outer diameter D and the inner diameter d is millimeter. The ventilation area S of the mesh disc is determined by applying the formula S=π(D / 2)-π(d / 2)2.

8. The control method of a terminal hood according to claim 7, characterized in that, The step of taking the ratio of the first time length and the second time length as the mesh disc oil fume purification efficiency of the current terminal oil fume extractor comprises: The ratio of the first time length and the second time length is taken as the primary purification percentage of the current terminal oil fume extractor. The cross-sectional windward side area and the cross-sectional leeward side area of the spoke of the mesh disc of the current terminal oil fume extractor are obtained, and the area ratio of the cross-sectional leeward side area to the cross-sectional windward side area is determined. If the area ratio is greater than 1, the primary purification percentage is increased according to the area ratio to obtain the mesh disc oil fume purification efficiency of the current terminal oil fume extractor, wherein the greater the area ratio is greater than 1, the greater the increase amplitude of the primary purification percentage is.

9. A terminal hood, characterized in that The terminal oil fume extractor comprises a processor, a memory, a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the control method of the terminal oil fume extractor according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that, The computer program is stored on the computer readable storage medium, and the computer program is executed by the processor to implement the steps of the control method of the terminal oil fume extractor according to any one of claims 1 to 8.

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