Residential Centralized Smoke Control Methods and Devices

Abstract

This invention provides a method and apparatus for centralized smoke exhaust control in residential buildings, relating to the technical field of central smoke hoods. The method includes: acquiring a first state signal sent by the air volume control valve whose opening / closing state has changed when at least one of the air volume control valves changes; adjusting the operating frequency of a fan according to the first state signal sent by each air volume control valve to maintain a negative pressure state in the common smoke duct; determining a second state signal corresponding to each air volume control valve currently in the open state based on the relative positions between the air volume control valves currently in the open state and a predetermined correspondence between the resistance and operating state of the air volume control valves; and sending a corresponding second state signal to each air volume control valve currently in the open state to adjust the operating state of the air volume control valve currently in the open state. This invention can prevent fumes from returning to the kitchen, improve smoke exhaust efficiency, and ensure airflow balance between the ground floor and the top floor.

Description

Technical Field

[0001] This invention relates to the field of central smoke hood technology, and in particular to a method and device for centralized smoke control in residential buildings. Background Technology

[0002] With the common installation of shared flues in high-rise residential buildings, kitchen fumes are vented into the shared flue through a range hood. The shared flue has a single vent on the roof, through which fumes are discharged to the roof of the residential building.

[0003] However, the current public flues are not airtight and have many leaks. After the range hood exhausts the fumes into the public flue, the air pressure inside the public flue will be higher than that in the kitchen. The fumes will then seep back into the kitchen through the leaks, resulting in low exhaust efficiency. Furthermore, kitchens that are not in use will be affected by the fumes from other kitchens. Summary of the Invention

[0004] The purpose of this invention is to provide a method and device for centralized smoke exhaust control in residential buildings, which can prevent cooking fumes from returning to the kitchen and improve smoke exhaust efficiency.

[0005] In a first aspect, the present invention provides a residential centralized smoke exhaust control method, applied to a controller in a centralized smoke exhaust system. The centralized smoke exhaust system includes a common smoke duct, connecting pipes for each floor, fume hoods for each floor's kitchen, a fan installed in the common smoke duct, a controller, and airflow control valves. The connecting pipes for each floor are respectively connected to the common smoke duct and the fume hoods for each floor's kitchen. Each connecting pipe is equipped with an airflow control valve. The controller is respectively connected to the fan and each airflow control valve. The airflow control valve is connected to the fume hood. The method includes:

[0006] When the opening and closing state of at least one of the air volume control valves changes, a first state signal sent by the air volume control valve whose opening and closing state has changed is acquired; wherein, when the opening and closing state of the fume hood changes, the opening and closing state of the air volume control valve connected to the fume hood changes accordingly; the first state signal includes at least the opening state information and closing state information of the air volume control valve.

[0007] The operating parameters of the fan are adjusted according to the first status signal sent by each of the air volume control valves so that the common flue is kept under negative pressure.

[0008] In an optional implementation, the operating parameter is the operating frequency. Adjusting the operating parameters of the fan according to the first status signal sent by each of the airflow control valves to maintain the common flue under negative pressure includes:

[0009] The number of airflow control valves currently in the open state is determined based on the first status signal sent by each of the airflow control valves.

[0010] The operating frequency of the fan is determined based on the number of air volume control valves currently in the open state and the following formula:

[0011] f = f 始 +Δf×n;

[0012] In the above formula, f is the operating frequency of the fan; f 始 Δf is the initial frequency of the fan when it starts working; Δf is the incremental frequency of the fan when each of the air volume control valves is activated; n is the number of air volume control valves that are currently in the open state, and n is a natural number.

[0013] In an optional implementation, it further includes:

[0014] Based on the relative positions of the currently open airflow control valves and the predetermined correspondence between the resistance and operating state of the airflow control valves, a second state signal is determined for each currently open airflow control valve; the second state signal is a signal regarding the opening degree of the airflow control valve.

[0015] A corresponding second status signal is sent to each airflow control valve that is currently in the open state, so that each airflow control valve that is currently in the open state adjusts its working state according to the corresponding second status signal.

[0016] In an optional implementation, after the step of acquiring the first status signal sent by the airflow control valve whose opening / closing state has changed when at least one of the airflow control valves changes, the method further includes:

[0017] The first status signal is sent to the air volume control valves on other floors.

[0018] In an optional implementation, a second state signal corresponding to each currently open airflow control valve is determined based on the relative positions of the currently open airflow control valves and a predetermined correspondence between the resistance and operating state of the airflow control valves, including:

[0019] Each air volume control valve that is currently in the open state is sorted from the lowest to the highest floor to determine the order among the air volume control valves that are currently in the open state.

[0020] Determine the second state signal S = S(P) corresponding to each airflow control valve that is currently in the open state. i ); where P i Let S be the resistance of the i-th airflow control valve currently in the open state, and S be the second state signal, S(P) i Let be the formula relating the resistance Pi of the airflow control valve to the operating state S; and determine P based on the following formula.i :

[0021] P i =P 始 +ΔP×(i-1);

[0022] In the above formula, i is the sequential number of the air volume control valve currently in the open state, i = 1, 2, 3...; P 始 ΔP represents the initial resistance of the airflow control valve; ΔP represents the incremental resistance of the fan each time an airflow control valve is activated.

[0023] In an optional embodiment, the air volume control valve is an electric valve; the second status signal is one of the following: the angle of the air volume control valve, the time required to open the air volume control valve, or the stroke of the air volume control valve when it opens.

[0024] Secondly, the present invention provides a residential centralized smoke exhaust control method, applied to an air volume regulating valve in a centralized smoke exhaust system. The centralized smoke exhaust system includes a common smoke duct, connecting pipes for each floor, fume hoods for kitchens on each floor, a fan installed in the common smoke duct, a controller, and an air volume control valve. The connecting pipes for each floor are respectively connected to the common smoke duct and the fume hoods for kitchens on each floor. The air volume control valve is installed on each connecting pipe. The controller is respectively connected to the fan and each air volume control valve, and the air volume control valves on each floor are interconnected. The air volume control valve is connected to the fume hood. The method includes:

[0025] When the open / closed state changes, a first state signal is sent to the controller so that the controller adjusts the operating parameters of the fan according to the first state signal to keep the common flue under negative pressure; wherein, the first state signal includes at least the open state information and the closed state information of the air volume control valve.

[0026] In an optional implementation, it further includes:

[0027] Receive the first status signal sent by the air volume control valve whose open / closed state has changed.

[0028] The corresponding second state signal is determined based on the relative positions of the air volume control valves currently in the open state and the predetermined correspondence between the resistance and working state of the air volume control valves; the second state signal is a signal about the opening degree of the air volume control valve.

[0029] Adjust the working state according to the second status signal.

[0030] Thirdly, the present invention provides a residential centralized smoke exhaust control device, applied to a controller in a centralized smoke exhaust system. The centralized smoke exhaust system includes a common smoke duct, connecting pipes for each floor, fume hoods for each floor's kitchen, a fan installed in the common smoke duct, a controller, and an airflow control valve. The connecting pipes for each floor are respectively connected to the common smoke duct and the fume hoods for each floor's kitchen. The airflow control valve is installed on each connecting pipe. The controller is respectively connected to the fan and each airflow control valve. The airflow control valve is connected to the fume hood. The device includes:

[0031] The acquisition module is used to acquire a first status signal sent by the air volume control valve whose opening and closing state has changed when the opening and closing state of at least one of the air volume control valves changes; wherein, when the opening and closing state of the fume hood changes, the opening and closing state of the air volume control valve connected to the fume hood changes accordingly; the first status signal includes at least the opening status information and closing status information of the air volume control valve.

[0032] The adjustment module is used to adjust the operating parameters of the fan according to the first status signal sent by each of the air volume control valves, so as to keep the common flue under negative pressure.

[0033] Fourthly, an electronic device provided by an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the method described in any of the foregoing embodiments.

[0034] Fifthly, embodiments of the present invention provide a computer-readable medium having processor-executable non-volatile program code, the program code causing the processor to perform the method described in any of the foregoing embodiments.

[0035] This invention provides a method and device for centralized smoke exhaust control in residential buildings. When the opening and closing state of the air volume control valve changes, the operating parameters of the fan are adjusted by acquiring the first state signal of the air volume control valve, so that the common smoke duct forms a negative pressure. This allows the fan's operating state to be adjusted in a timely manner when the smoke hood is opened or closed, so that the common smoke duct is always kept in a negative pressure state; thus, it avoids backflow of oil fumes and improves smoke exhaust efficiency. This invention can improve the user experience, and the method is simple and easy to implement. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 A flowchart of a residential centralized smoke exhaust control method provided in Embodiment 1 of the present invention;

[0038] Figure 2 This is a structural schematic diagram of the centralized smoke exhaust system provided in Embodiment 1 of the present invention;

[0039] Figure 3 This is a system schematic diagram of the centralized smoke exhaust system provided in Embodiment 1 of the present invention;

[0040] Figure 4 This is another flowchart of the residential centralized smoke exhaust control method provided in Embodiment 1 of the present invention;

[0041] Figure 5 This is a system schematic diagram of a residential centralized smoke exhaust control device provided in Embodiment 1 of the present invention;

[0042] Figure 6 A system schematic diagram of an electronic device provided as an example of an embodiment of the present invention;

[0043] Figure 7 This is a flowchart of a residential centralized smoke exhaust control method provided in Embodiment 2 of the present invention;

[0044] Figure 8 This is a system schematic diagram of the centralized smoke exhaust system provided in Embodiment 2 of the present invention.

[0045] Icons: 21-Public flue; 22-Connecting pipe; 23-Fume hood; 24-Fan; 25-Controller; 26-Airflow control valve; 27-Fume hood control panel; 51-Acquisition module; 52-Adjustment module; 400-Electronic equipment; 401-Communication interface; 402-Processor; 403-Memory; 404-Bus. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0049] In the description of this invention, it should be noted that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0052] High-rise residential buildings are usually equipped with a common flue. The common flue has an exhaust vent on the roof. The range hood draws the cooking fumes from the kitchen into the common flue, and the fumes are discharged through the exhaust vent.

[0053] While the performance of range hoods has improved year by year, with airflow and air pressure increasing annually, there has been little technological advancement in the shared ventilation ducts of high-rise residential buildings, resulting in persistent airtightness issues. When the range hood vents fumes into the shared ventilation duct, the internal air pressure is higher than in the kitchen. This causes fumes to seep back into the kitchen through leaks, leading to inefficient ventilation. Furthermore, even kitchens not in use are affected by fumes from other kitchens.

[0054] To address the aforementioned issues, increasing the airflow and air pressure of the range hood can accelerate smoke extraction from the kitchen. However, this not only increases the energy consumption of the range hood but also raises the pressure within the shared ventilation duct, exacerbating smoke leakage and making cross-contamination of smoke in kitchens without the range hood even more severe. Therefore, improving the performance of the range hood cannot change the fact that smoke cross-contamination occurs in the kitchen; in fact, the better the range hood, the more severe the problem becomes.

[0055] Based on this, the present invention provides a method and device for centralized smoke exhaust control in residential buildings. By changing the pressure of the public flue, the phenomenon of smoke cross-contamination is eliminated, preventing fumes from returning to the kitchen, improving the air quality in the kitchen, and increasing the smoke exhaust efficiency of the range hood.

[0056] Example 1

[0057] This embodiment provides a residential centralized smoke exhaust control method, applied to the controller of a centralized smoke exhaust system, referring to... Figure 2 The centralized smoke exhaust system of this embodiment includes a common flue 21, with connecting pipes 22 on each floor connected to the common flue 21, and each floor's kitchen equipped with a fume hood 23 connected to the connecting pipes 22; it also includes a fan 24, a controller 25, and airflow control valves 26. The fan 24 is located at the air outlet of the common flue 21 (or can be located in the common flue), and each connecting pipe 22 is equipped with an airflow control valve 26; the controller 25 is connected to the fan 24 and each airflow control valve 26 respectively; wherein, the airflow control valve is connected to the fume hood; the method of this embodiment is applied to the controller.

[0058] Specifically, the connecting pipe connects the common flue to the fume hood, and the air volume control valve adjusts the air volume by regulating its own resistance. The air volume control valve is installed at the air inlet of each floor of the common flue (i.e., at the connection end between the connecting pipe and the common flue), or it can be installed in the connecting pipe or at the connection end between the connecting pipe and the fume hood.

[0059] Preferably, the fume hood in this embodiment does not have a fan, but may have a control panel for receiving user exhaust commands. The kitchen fumes are collected by the fume hood and then enter the common flue after passing through an airflow control valve.

[0060] Figure 3 This is a system schematic diagram of the centralized smoke exhaust system in this embodiment. The controller 25 is connected to the fan 24 and the air volume control valves 26 on each floor. The air volume control valves 26 on the same floor are connected to the smoke hood control panel 27. After receiving a smoke exhaust command, the smoke hood control panel 27 sends an opening signal to the air volume control valve 26, and the air volume control valve 26 opens according to the opening signal.

[0061] The connection between each air volume control valve and the controller can be wired or wireless, and the connection between the air volume control valve and the corresponding fume hood control panel can be wired or wireless.

[0062] See Figure 1 The method in this embodiment includes the following steps:

[0063] S110, when the opening and closing state of at least one air volume control valve changes, acquire the first state signal sent by the air volume control valve whose opening and closing state has changed; wherein, the first state signal includes the opening state information and closing state information of the air volume control valve.

[0064] Specifically, the open / closed state refers to the open or closed state. The airflow control valve is connected to the control panel of the fume hood. When the user operates the control panel and opens the fume hood, the airflow control valve connected to the fume hood opens and sends an open / closed state signal to the controller. That is, when the open / closed state of the fume hood changes, the open / closed state of the airflow control valve connected to the fume hood changes accordingly.

[0065] Preferably, in this embodiment, each connecting pipe is equipped with a corresponding airflow control valve. When the airflow control valve is in the closed state, it should have high airtightness (i.e., the airflow control valve does not leak air and the airflow is zero). When the airflow control valve is closed, a negative pressure is formed between the closed airflow control valve and the common flue under the action of the fan; thus, under negative pressure conditions, there will be no backflow of oil fumes into the kitchen. In a possible embodiment, when each connecting pipe is equipped with multiple airflow control valves, these airflow control valves should also have high airtightness to ensure that a negative pressure state is maintained from the common flue to the connecting pipe for a long time.

[0066] Preferably, the first status signal also includes the position information of the air volume control valve whose open / closed state has changed, which may be floor information.

[0067] S120 adjusts the operating parameters of the fan according to the first status signal sent by each air volume control valve to keep the common flue under negative pressure.

[0068] Specifically, after receiving the first state signal, the controller determines the operating parameters of the fan to maintain the current negative pressure in the current public flue, and ensures that the public flue remains in a negative pressure state for a long time by adjusting the operating parameters of the fan, that is, adjusting the air volume of the fan per unit time.

[0069] This embodiment incorporates an airflow regulating valve on the connecting pipe. When closed, the valve maintains high airtightness, creating a relatively enclosed space within which the fan draws air. Simultaneously, the fan's operating parameters are adjusted so that the pressure within this enclosed space remains below standard atmospheric pressure, ensuring the common exhaust duct is always under negative pressure. This fundamentally prevents cross-contamination of kitchen smoke, effectively improves kitchen air quality, enhances exhaust efficiency, and significantly improves the user experience.

[0070] Optionally, the operating parameter in the above embodiments is the operating frequency, and step S120 in the above embodiments includes the following steps:

[0071] The number of airflow control valves currently in the open state is determined based on the first status signal sent by each airflow control valve.

[0072] The operating frequency of the fan is determined based on the number of air volume control valves currently in the open state and the following formula:

[0073] f = f 始 +Δf×n, (1);

[0074] (1) In the formula, f is the operating frequency of the fan; f 始 Δf is the initial frequency of the fan when it starts working; Δf is the incremental frequency of the fan when each air volume control valve is activated; n is the number of air volume control valves that are currently open, and n is a natural number.

[0075] Specifically, since negative pressure needs to be generated in the common flue, it is necessary to adjust the air volume of the fan per unit time, that is, to adjust the operating frequency of the fan, so as to ensure that the common flue is maintained in a negative pressure state for a long time. The controller in this embodiment has a frequency conversion control function, which can realize the frequency conversion control of the fan.

[0076] f 始 Both Δf and Δf are preset values ​​obtained through experiments. When n air volume control valves are open (i.e. when n smoke hoods are working), the working frequency of the fan is calculated by formula (1), and the fan is controlled to draw air at this working frequency, so that the negative pressure value of the common flue is kept stable.

[0077] It should also be noted that when a kitchen's exhaust hood is on, the controller increases the fan's operating frequency, increasing the negative pressure in the common exhaust duct. When a kitchen's exhaust hood is off, the controller decreases the fan's operating frequency, decreasing the negative pressure in the common exhaust duct. When no kitchen needs to exhaust smoke, the controller stops the fan.

[0078] In this embodiment, the system load mainly depends on the number of kitchens in smoke extraction mode. The initial frequency ensures a basic airflow, and the frequency increases with each additional kitchen requiring smoke extraction. This allows the overall system performance to better match the demand, achieving maximum efficiency and reducing noise overall. Therefore, this embodiment improves the controller's efficiency and reduces energy consumption and noise.

[0079] Optionally, the method in the above embodiments further includes the following steps:

[0080] Based on the relative positions of the currently open airflow control valves and the predetermined correspondence between the resistance and operating state of the airflow control valves, a second state signal is determined for each currently open airflow control valve; the second state signal is a signal about the opening degree of the airflow control valve.

[0081] A corresponding second status signal is sent to each airflow control valve that is currently in the open state, so that each airflow control valve that is currently in the open state adjusts its working state according to the corresponding second status signal.

[0082] Specifically, since the fans are usually installed on the top floor, the kitchens on higher floors have better smoke extraction, while the air volume of residents on lower floors is lower than that of residents on higher floors, resulting in a smaller pressure difference with standard atmospheric pressure and less ideal smoke extraction. Therefore, this embodiment adjusts the working state of the air volume control valve to make the air volume of kitchens on lower floors and kitchens on higher floors basically the same.

[0083] An airflow regulating valve adjusts its own resistance, thereby regulating its airflow, through an electric component. To ensure that the airflow is relatively consistent across different floors, the airflow regulating valves on different floors need to be set with different resistance levels; that is, the airflow regulating valves on higher floors should have higher resistance, while the airflow regulating valves on lower floors should have lower resistance.

[0084] In this embodiment, the resistance of the airflow control valve is adjusted by regulating its operating state. Therefore, it is first necessary to experimentally determine the correspondence between the operating state and resistance of the airflow control valve. Then, the different resistances required for the airflow control valves in the open state on different floors are determined, and the operating state of the airflow control valves on different floors is calculated. Finally, the calculated results are sent to each airflow control valve in the open state, thereby adjusting the operating state of the open airflow control valves to achieve the goal of having a basically consistent airflow across airflow control valves on different floors.

[0085] Optionally, the method in the above embodiments may further include the following steps after step S110:

[0086] The first status signal is sent to the air volume control valves on other floors.

[0087] Specifically, in order to promptly adjust the operating status of the fan and other air control valves on each floor when the range hood is turned on or off, it is also necessary to send a first status signal to the air volume control valves on other floors. Therefore, in this embodiment, the open or closed status signal of the air volume control valve is sent to all air volume control valves that are currently in the open state through the controller.

[0088] The connection between the airflow control valves and controllers on each floor can be either wired or wireless. Similarly, the connection between the airflow control valve on each floor and the corresponding fume hood control panel on that floor can also be either wired or wireless. Wired connections ensure stable signal transmission and are less susceptible to interference from external signals or the environment. Wireless connections are less affected by high-temperature fumes and are easier to install.

[0089] Optionally, the method in the above embodiments, which determines the second state signal corresponding to each airflow control valve currently in the open state based on the relative positions between the airflow control valves currently in the open state and a predetermined correspondence between the resistance and operating state of the airflow control valve, includes the following steps:

[0090] Each air volume control valve that is currently in the open state is sorted from the lowest to the highest floor to determine the order among the air volume control valves that are currently in the open state.

[0091] Determine the second state signal S = S(P) corresponding to each airflow control valve that is currently in the open state. i ); where P i Let S be the resistance of the i-th airflow control valve currently in the open state, and S be the second state signal, S(P) i Let be the formula relating the resistance Pi of the airflow control valve to the operating state S; and determine P based on the following formula. i :

[0092] P i =P 始 +ΔP×(i-1); (2);

[0093] (2) In the formula, i is the sequential number of the air volume control valve currently in the open state, i = 1, 2, 3...; P 始 ΔP represents the initial resistance of the airflow control valve; ΔP represents the incremental resistance of the fan each time an airflow control valve is activated.

[0094] Specifically, after determining which airflow control valves are in the open state, the open airflow control valves are numbered from bottom to top, starting from the lowest floor, with the initial value of number i being 1. For example, if the airflow control valves on the 3rd, 5th, 10th, and 12th floors are in the open state, then the airflow control valve on the 3rd floor is numbered 1, the airflow control valve on the 5th floor is numbered 2, the airflow control valve on the 10th floor is numbered 3, and the airflow control valve on the 12th floor is numbered 4, i.e., i = 1, 2, 3, 4.

[0095] Substituting the value of i into formula (2), we obtain the Pi values ​​corresponding to the air volume control valves on the 3rd, 5th, 10th, and 12th floors; then, according to S = S(P i Determine the second state signal S corresponding to each floor. Then, send the S value corresponding to each floor to the air volume control valve.

[0096] When the first kitchen's range hood is turned on, the airflow control valve opens, and the corresponding operating state is S(P). 始 );

[0097] When the range hoods of n kitchens in the local area are turned on, the air volume control valves that are turned on are sorted by floor to obtain the i value, and the S value corresponding to the air volume control valve of each floor is calculated according to formula (2). After the S value of each floor is sent to the air volume control valve of each floor, the air volume control valve adjusts its working state according to the corresponding S value.

[0098] Optionally, the air volume control valve in the above embodiments is an electric valve; the second state signal is one of the following: the angle of the air volume control valve, the time required to open the air volume control valve, or the stroke of the air volume control valve when it is opened.

[0099] Specifically, airflow control valves typically regulate airflow by controlling the valve's opening degree. The valve opening degree can be controlled by parameters such as angle, opening time, and opening stroke (i.e., distance). Some airflow control valves regulate airflow by adjusting the valve angle, some by controlling the opening time (e.g., the time required for the valve to open from 0 degrees to 50 degrees), and some by the opening stroke (i.e., the distance traveled from the open valve to the target angle). Therefore, these airflow control valves have different adjustment parameters and different second-state signals.

[0100] The working process of this embodiment can be as follows:

[0101] When the first kitchen exhaust hood on the first floor receives a smoke extraction command input by the user, the control panel of that floor's exhaust hood sends a signal to the airflow control valve on that floor, causing the airflow control valve to open to the operating state S = S(P). i The system sends a first status signal to the controller, which then sends the first status signal to the airflow control valves on other floors; the controller controls the fan to operate at frequency f = f 始 +Δf, negative pressure is formed in the public flue, and the fumes are discharged to the roof and outdoors through the fume hood, connecting pipe, air volume control valve and public flue.

[0102] When the second kitchen exhaust hood on the second floor receives a smoke extraction command from the user, the control panel of that floor's hood sends a signal to the airflow control valve on that floor, causing the airflow control valve to open to the operating state S = S(P). i +ΔP), and sends a first status signal to the controller, which then sends the first status signal to the air volume control valves on other floors; the controller controls the fan to adjust to the operating frequency f = f 始 +2Δf, the negative pressure of the public flue is enhanced, and the fumes are discharged to the roof and outdoors through the fume hood, connecting pipe, air volume control valve and public flue.

[0103] When the m-th kitchen exhaust hood on the m-th floor receives a user-input command to stop exhaust, the control panel of that floor sends a signal to the airflow control valve on that floor. The airflow control valve on that floor closes and sends a first status signal to the controller. The controller then sends the first status signal to the airflow control valves on other floors. The controller controls the fan to adjust to the set operating frequency (the operating frequency decreases), the negative pressure in the common flue decreases, and the fumes are exhausted to the roof and outdoors through the exhaust hood, connecting pipe, airflow control valve, and common flue.

[0104] Reference Figure 4 In practical implementation, the controller's control flow may include the following steps:

[0105] Step S210, Working status;

[0106] Step S220: Determine if a range hood control panel has received a smoke exhaust command. If so, proceed to step S230; otherwise, continue with this step.

[0107] Step S230: Receive the first control signal sent by the air volume control valve that has just been opened;

[0108] Step S240: Adjust the fan operating frequency to f = f 始 +Δf×n;

[0109] Step S250: Sort each air volume control valve that is in the open state from low to high according to the floor it is located on;

[0110] Step S260: Send the corresponding sequence number to the air volume control valve that is currently in the open state;

[0111] Step S270: Send a second status signal S = S(P) to the air volume control valve that is currently in the open state. i ).

[0112] This embodiment changes the pressure of the entire flue system during smoke exhaust, fundamentally preventing cross-contamination of smoke and greatly improving the quality of kitchen control.

[0113] Reference Figure 5 This invention provides a residential centralized smoke exhaust control device, applied to a controller in a centralized smoke exhaust system. The centralized smoke exhaust system includes a common smoke duct, connecting pipes for each floor, fume hoods in the kitchens of each floor, a fan installed at the air outlet of the common smoke duct, a controller, and airflow control valves. The connecting pipes for each floor are respectively connected to the common smoke duct and the fume hoods in the kitchens of each floor, and an airflow control valve is installed on each connecting pipe. The controller is connected to the fan and each airflow control valve. The airflow control valve is connected to the fume hood, and the airflow control valve adjusts its own resistance to achieve different airflow adjustments. The device in this embodiment includes the following modules:

[0114] The acquisition module 51 is used to acquire a first status signal sent by the air volume control valve whose opening and closing state has changed when the opening and closing state of at least one air volume control valve changes; wherein, when the opening and closing state of the fume hood changes, the opening and closing state of the air volume control valve connected to the fume hood changes accordingly; the first status signal includes at least the opening status information and closing status information of the air volume control valve.

[0115] The adjustment module 52 is used to adjust the operating parameters of the fan according to the first status signal sent by each air volume control valve so as to keep the common flue under negative pressure.

[0116] Optionally, the operating parameter in the device of the above embodiment is the operating frequency, and the adjustment module 52 in the device of the above embodiment includes the following modules:

[0117] The quantity determination module is used to determine the number of air volume control valves that are currently in the open state based on the first status signal sent by each air volume control valve.

[0118] The frequency determination module is used to determine the operating frequency of the fan based on the number of air volume control valves currently in the open state and the following formula:

[0119] f = f 始 +Δf×n;

[0120] In the above formula, f is the operating frequency of the fan; 始 Δf is the initial frequency of the fan when it starts working; Δf is the incremental frequency of the fan when each air volume control valve is activated; n is the number of air volume control valves that are currently open, and n is a natural number.

[0121] Optionally, the apparatus of the above embodiments further includes the following modules:

[0122] The working status determination module is used to determine the second status signal corresponding to each air volume control valve that is currently in the open state based on the relative position between the air volume control valves that are currently in the open state and the pre-determined correspondence between the resistance of the air volume control valve and the working status; the second status signal is a signal about the opening degree of the air volume control valve.

[0123] The working status adjustment module is used to send a corresponding second status signal to each air volume control valve that is currently in the open state, so that each air volume control valve that is currently in the open state can adjust its working status according to the corresponding second status signal.

[0124] Optionally, the apparatus of the above embodiments further includes the following modules:

[0125] The transmitting module is used to send the first status signal to the air volume control valves on other floors.

[0126] Optionally, the operating status determination module in the apparatus of the above embodiments includes the following modules:

[0127] The sorting module is used to sort each air volume control valve that is in the open state from low to high according to the floor it is located on, so as to determine the order among the air volume control valves that are currently in the open state.

[0128] The calculation module is used to determine the second state signal S = S(P) corresponding to each airflow control valve that is currently in the open state. i ); where P i Let S be the resistance of the i-th airflow control valve currently in the open state, and S be the second state signal, S(P) i Let be the formula relating the resistance Pi of the airflow control valve to the operating state S; and determine P based on the following formula. i :

[0129] P i =P 始 +ΔP×(i-1);

[0130] In the above formula, i is the sequential number of the air volume control valve currently in the open state, i = 1, 2, 3...; P 始 ΔP represents the initial resistance of the airflow control valve; ΔP represents the incremental resistance of the fan each time an airflow control valve is activated.

[0131] Optionally, the air volume control valve in the device of the above embodiment is an electric valve; the second state signal in the device of the above embodiment is one of the angle of the air volume control valve, the time required to open the air volume control valve, or the stroke of the air volume control valve when it is opened.

[0132] See Figure 6 The present invention also provides an electronic device 400, including a communication interface 401, a processor 402, a memory 403, and a bus 404. The processor 402, the communication interface 401, and the memory 403 are connected through the bus 404. The memory 403 is used to store a computer program that supports the processor 402 in executing the above-mentioned residential centralized smoke exhaust control method. The processor 402 is configured to execute the program stored in the memory 403.

[0133] Optionally, embodiments of the present invention also provide a computer-readable medium having processor-executable non-volatile program code, the program code causing the processor to perform the residential centralized smoke exhaust control method as described in the above embodiments.

[0134] Example 2

[0135] This embodiment provides a method for centralized smoke exhaust control in residential buildings, applied to the air volume control valve in a centralized smoke exhaust system. The centralized smoke exhaust system includes a common smoke duct, connecting pipes for each floor, fume hoods for each floor's kitchen, a fan installed at the air outlet of the common smoke duct, a controller, and an air volume control valve. The connecting pipes for each floor are connected to the common smoke duct and the fume hoods for each floor's kitchen, respectively, and an air volume control valve is installed on each connecting pipe. The controller is connected to the fan and each air volume control valve, and the air volume control valves on each floor are interconnected. The air volume control valve is connected to the fume hood, and the air volume control valve adjusts its own resistance to achieve different air volume adjustments.

[0136] Specifically, refer to Figure 8 Unlike the centralized smoke exhaust system in Embodiment 1, the air volume control valves on each floor in this embodiment are connected via wired or wireless means. Preferably, the controller and the air volume control valves on each floor are equipped with wireless communication antennas, and the controller and the air volume control valves on each floor are also connected via wireless communication.

[0137] Reference Figure 7 The method in this embodiment includes the following steps:

[0138] Step S310: When the open / closed state changes, a first state signal is sent to the controller so that the controller adjusts the operating parameters of the fan according to the first state signal to keep the common flue under negative pressure; wherein, the first state signal includes at least the open state information and the closed state information of the air volume control valve.

[0139] Optionally, refer to Figure 7 The method in the above embodiments further includes the following steps:

[0140] Step S320: Receive the first status signal sent by the air volume control valve whose open / closed state has changed;

[0141] Step S330: Determine the corresponding second state signal based on the relative positions of the air volume control valves currently in the open state and the predetermined correspondence between the resistance and working state of the air volume control valves; the second state signal is a signal about the opening degree of the air volume control valve.

[0142] Step S340: Adjust the working state according to the second state signal.

[0143] Specifically, this embodiment differs from Embodiment 1 in that when a smoke hood on a certain floor receives a smoke exhaust command, the airflow control valve on that floor sends its first status signal wirelessly to the airflow control valves on other floors that are in the open state. In this way, each airflow control valve on each floor calculates its second status signal using the same principle as in the previous embodiment, and thus adjusts its operating state according to its calculated second status signal.

[0144] This embodiment can effectively ensure that each control signal is effectively transmitted to the air volume control valves on each floor, and ensure that the air volume control valves on each floor adjust their working status in a timely manner.

[0145] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for centralized smoke control in residential buildings, characterized in that, A controller is applied to a centralized smoke extraction system, the centralized smoke extraction system including a common smoke duct, connecting pipes for each floor, fume hoods for each floor's kitchen, a fan installed in the common smoke duct, a controller, and airflow control valves. The connecting pipes for each floor are respectively connected to the common smoke duct and the fume hoods for each floor's kitchen, and the airflow control valve is installed on each connecting pipe; the controller is respectively connected to the fan and each of the airflow control valves; the airflow control valves are connected to the fume hoods; the method includes: When the opening and closing state of at least one of the air volume control valves changes, a first state signal sent by the air volume control valve whose opening and closing state has changed is acquired; wherein, the first state signal includes at least the opening state information and closing state information of the air volume control valve. Adjusting the operating parameters of the fan according to the first status signal sent by each of the air volume control valves to maintain the common flue under negative pressure includes: The number of airflow control valves currently in the open state is determined based on the first status signal sent by each of the airflow control valves. The operating frequency of the fan is determined based on the number of air volume control valves currently in the open state and the following formula: f=f 始 +Δf×n, In the above formula, f is the operating frequency of the fan; f 始 Δf is the initial frequency of the fan when it starts working; Δf is the increment frequency of the fan when each of the air volume control valves is activated; n is the number of air volume control valves that are currently open, and n is a natural number. The fume hood does not have an independent exhaust fan; its exhaust power is provided by the fan in the common flue. The opening and closing state of the air volume control valve directly responds to the operation command of the fume hood and switches in linkage, realizing centralized negative pressure exhaust control without an independent exhaust fan.

2. The method according to claim 1, characterized in that, Also includes: Based on the relative positions of the currently open airflow control valves and the predetermined correspondence between the resistance and operating state of the airflow control valves, a second state signal is determined for each currently open airflow control valve; the second state signal is a signal regarding the opening degree of the airflow control valve. A corresponding second status signal is sent to each airflow control valve that is currently in the open state, so that each airflow control valve that is currently in the open state adjusts its working state according to the corresponding second status signal.

3. The control method according to claim 1, characterized in that, When the open / closed state of at least one of the airflow control valves changes, the step of acquiring the first state signal sent by the airflow control valve whose open / closed state has changed further includes: The first status signal is sent to the air volume control valves on other floors.

4. The control method according to claim 2, characterized in that, Based on the relative positions of the currently open airflow control valves and the predetermined correspondence between the resistance and operating state of the airflow control valves, a second state signal corresponding to each currently open airflow control valve is determined, including: Each air volume control valve that is currently in the open state is sorted from the lowest to the highest floor to determine the order among the air volume control valves that are currently in the open state. Determine the second state signal S=S(P) corresponding to each airflow control valve that is currently in the open state. i ); where P i Let S be the resistance of the i-th airflow control valve currently in the open state, and S be the second state signal, S(P) i Let be the formula relating the resistance Pi of the airflow control valve to the operating state S; and determine P based on the following formula. i : P i =P 始 +ΔP×(i-1); In the above formula, i is the sequential number of the air volume control valve currently in the open state, i = 1, 2, 3...; P 始 ΔP represents the initial resistance of the airflow control valve; ΔP represents the incremental resistance of the fan each time an airflow control valve is activated.

5. The control method according to claim 4, characterized in that, The air volume control valve is an electric valve; the second status signal is one of the following: the angle of the air volume control valve, the time required to open the air volume control valve, or the stroke of the air volume control valve when it opens.

6. A method for centralized smoke exhaust control in residential buildings, characterized in that, An airflow control valve is applied to a centralized smoke exhaust system. The centralized smoke exhaust system includes a common smoke duct, connecting pipes for each floor, fume hoods for each floor's kitchen, a fan installed in the common smoke duct, a controller, and an airflow control valve. The connecting pipes for each floor are respectively connected to the common smoke duct and the fume hoods for each floor's kitchen. The airflow control valve is installed on each connecting pipe. The controller is connected to the fan and each airflow control valve, and the airflow control valves on each floor are interconnected. The airflow control valve is connected to the fume hood. The method includes: When the open / closed state changes, a first state signal is sent to the controller so that the controller adjusts the operating parameters of the fan according to the first state signal to keep the common flue under negative pressure; wherein, the first state signal includes at least the open state information and the closed state information of the air volume control valve; Receive the first status signal sent by the air volume control valve whose open / closed state has changed. The corresponding second state signal is determined based on the relative positions of the air volume control valves currently in the open state and the predetermined correspondence between the resistance and working state of the air volume control valves; the second state signal is a signal about the opening degree of the air volume control valve. Adjust the working state according to the second status signal; The fume hood does not have an independent exhaust fan; its exhaust power is provided by the fan in the common flue. The opening and closing state of the air volume control valve directly responds to the operation command of the fume hood and switches in linkage, realizing centralized negative pressure exhaust control without an independent exhaust fan.

7. A residential centralized smoke exhaust control device, characterized in that, A controller is used in a centralized smoke extraction system. The centralized smoke extraction system includes a common smoke duct, connecting pipes for each floor, fume hoods for each floor's kitchen, a fan installed in the common smoke duct, a controller, and airflow control valves. The connecting pipes for each floor are connected to the common smoke duct and the fume hoods for each floor's kitchen, respectively. Each connecting pipe is equipped with an airflow control valve. The controller is connected to the fan and each airflow control valve. The airflow control valves are connected to the fume hoods. The device includes: The acquisition module is used to acquire a first status signal sent by the air volume control valve whose opening and closing state has changed when the opening and closing state of at least one of the air volume control valves changes; wherein, when the opening and closing state of the fume hood changes, the opening and closing state of the air volume control valve connected to the fume hood changes accordingly; the first status signal includes at least the opening status information and closing status information of the air volume control valve. The adjustment module is used to adjust the operating parameters of the fan according to the first status signal sent by each of the air volume control valves, so as to maintain the common flue in a negative pressure state. This includes: determining the number of air volume control valves currently in the open state based on the first status signal sent by each of the air volume control valves; and determining the operating frequency of the fan based on the number of air volume control valves currently in the open state and the following formula: f = f 始 +Δf×n, where f is the operating frequency of the fan; f 始 Δf is the initial frequency of the fan when it starts working; Δf is the increment frequency of the fan when each of the air volume control valves is activated; n is the number of air volume control valves that are currently open, and n is a natural number. The fume hood does not have an independent exhaust fan; its exhaust power is provided by the fan in the common flue. The opening and closing state of the air volume control valve directly responds to the operation command of the fume hood and switches in linkage, realizing centralized negative pressure exhaust control without an independent exhaust fan.

8. A computer-readable medium having processor-executable non-volatile program code, characterized in that, The program code causes the processor to execute the method according to any one of claims 1 to 6.

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