Central exhaust equipment and method for controlling exhaust volume of central exhaust equipment

Abstract

The application provides a central smoke exhaust device and a central smoke exhaust device exhaust volume control method, which comprises: an air inlet main pipe, at least one exhaust branch pipe, an electric control box, a main air speed acquisition sensor, a branch pipe control assembly and a smoke exhaust structure; the branch pipe control assembly comprises an air valve; the air inlet main pipe is connected with the exhaust branch pipe and the smoke exhaust structure respectively; the main air speed acquisition sensor is arranged in the smoke exhaust structure and acquires the main pipe air speed of the air inlet main pipe; each exhaust branch pipe is provided with a branch pipe control assembly, and the branch pipe control assembly acquires branch pipe detection data of the exhaust branch pipe; the electric control box is in communication connection with the main air speed acquisition sensor and the branch pipe control assembly, and is used for adjusting the opening degree of the air valve and the exhaust volume of the smoke exhaust structure according to the branch pipe detection data and the main pipe air speed. The exhaust volume of the fan and the opening degree of the air valve are adjusted through the electric control box, so that the exhaust volume of each branch pipe terminal is accurately controlled, and the exhaust effect of each branch pipe terminal is improved.

Description

Technical Field

[0001] This invention relates to the field of central smoke exhaust technology, and in particular to a central smoke exhaust device and a method for controlling the exhaust volume of the central smoke exhaust device. Background Technology

[0002] Currently, most central smoke extraction systems on the market rely on theoretical formulas to simulate and calculate the corresponding air volume based on different fan frequencies. They then calculate the branch duct air volume based on the varying area of ​​the exhaust ducts installed at different branch terminals (such as restaurant shops or kitchens). Finally, based on the number of operating units at different branch terminals and the area of ​​the exhaust ducts at all branches with open dampers, the total air volume, i.e., the main pipe air volume, is calculated, and the fans are then activated at the operating frequency corresponding to the main pipe air volume. However, this is mostly based on theoretical calculations and lacks actual air volume feedback. As a result, the air volume at each smoke hood port of the branch terminals is difficult to distribute completely evenly, leading to some shops having good smoke extraction effects while others have average or poor extraction, resulting in incomplete smoke removal. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a central smoke exhaust device and a method for controlling the exhaust volume of the central smoke exhaust device, thereby achieving precise control of the exhaust volume of each branch terminal and improving the exhaust effect of each branch terminal.

[0004] In a first aspect, embodiments of the present invention provide a central smoke exhaust device, comprising: a main air inlet duct, at least one exhaust branch duct, an electrical control box, a main air velocity acquisition sensor, a branch duct control component, and a smoke exhaust structure; the branch duct control component includes an air valve; the outlet of the exhaust branch duct is connected to the main air inlet duct; the smoke exhaust structure is disposed at the outlet end of the main air inlet duct; the main air velocity acquisition sensor is disposed in the smoke exhaust structure for acquiring the main air velocity of the main air inlet duct; each exhaust branch duct is provided with a branch duct control component for acquiring branch duct detection data; the electrical control box is communicatively connected to the main air velocity acquisition sensor and the branch duct control component, and the electrical control box is used to adjust the opening degree of the air valve and the exhaust volume of the smoke exhaust structure according to the branch duct detection data and the main air velocity.

[0005] Furthermore, the branch pipe control component also includes a branch wind speed acquisition sensor and a damper controller; the damper controller is connected to the damper; the branch wind speed acquisition sensor and the damper controller are respectively communicatively connected to the electrical control box; the damper controller is used to open the damper after receiving an opening signal sent by the user, and send the opening signal to the electrical control box; the branch wind speed acquisition sensor is used to monitor the branch wind speed of the exhaust branch pipe in real time, and send the branch wind speed to the electrical control box; the electrical control box is used to calculate the real-time air volume of the exhaust branch pipe based on the current branch wind speed after receiving the opening signal, compare the real-time air volume of the branch pipe with the preset branch air volume to obtain a first comparison result, and send a damper control signal to the damper controller corresponding to the exhaust branch pipe based on the first comparison result; the damper controller is also used to adjust the opening degree of the damper according to the damper control signal.

[0006] Furthermore, the smoke exhaust structure includes an electrostatic purification unit, a purified ventilation duct, and a fan box connected in sequence, with a fan installed in the fan box; the fan is communicatively connected to the electrical control box; a main wind speed acquisition sensor is installed in the purified ventilation duct; the electrostatic purification unit is connected to the outlet end of the main air inlet duct; the main wind speed acquisition sensor is used to monitor the main wind speed of the purified ventilation duct in real time and send the main wind speed to the electrical control box; the electrical control box is used to acquire the opening signals sent by each branch control component, determine the number of valves in the open state based on the number of opening signals, determine the main air demand and the first operating frequency of the fan based on the number of valves opened and the preset branch air volume, so that the fan operates at the first operating frequency; calculate the real-time air volume of the main ventilation duct based on the main wind speed, compare the real-time air volume of the main air volume with the main air demand to obtain a second comparison result, and adjust the exhaust volume of the fan based on the second comparison result.

[0007] Furthermore, the central smoke exhaust system also includes a cloud platform; the electrical control box communicates with the cloud platform; the electrical control box is also used to obtain the total electrical energy consumed by the smoke exhaust structure during operation within each preset time period and the proportion of electrical energy consumed by the corresponding air valve of each exhaust branch pipe within the current preset time period, thereby determining the branch pipe electrical energy consumed by each exhaust branch pipe, and sending the total electrical energy and branch pipe electrical energy to the cloud platform; the cloud platform is used to store the total electrical energy and branch pipe electrical energy sent by the electrical control box, and accumulate the branch pipe electrical energy according to a preset time period for user query.

[0008] Furthermore, the central smoke exhaust system also includes at least one branch pipe terminal; the branch pipe terminal is connected to the air inlet of the exhaust branch pipe; the branch pipe terminal is set up correspondingly to the exhaust branch pipe.

[0009] Secondly, embodiments of the present invention provide a method for controlling the exhaust volume of a central smoke exhaust system, applicable to any of the aforementioned central smoke exhaust systems; the exhaust volume control method includes: a damper controller acquiring an opening signal sent by a user, opening the corresponding damper according to the opening signal, and sending the opening signal to an electrical control box; the electrical control box acquiring the opening signal sent by each damper controller, and determining the number of dampers in the open state based on the number of opening signals; the electrical control box determining a first operating frequency of the fan based on the number of open dampers and a preset branch pipe air volume; the electrical control box acquiring the main pipe wind speed sent by the main wind speed acquisition sensor, and adjusting the exhaust volume of the fan according to the main pipe wind speed; the electrical control box acquiring branch pipe detection data sent by each branch pipe control component, and adjusting the opening degree of the damper corresponding to each exhaust branch pipe according to the branch pipe detection data.

[0010] Furthermore, the step of determining the first operating frequency of the fan based on the number of valves opened and the preset branch pipe air volume includes: determining the required air volume of the main pipe of the central smoke exhaust equipment based on the number of valves opened and the preset branch pipe air volume; and determining the first operating frequency of the fan based on the preset air volume-frequency correspondence rule and the required air volume of the main pipe.

[0011] Furthermore, the step of the electrical control box acquiring the main pipe wind speed sent by the main wind speed acquisition sensor and adjusting the exhaust volume of the fan according to the main pipe wind speed includes: determining the cross-sectional area of ​​the main pipe of the purification ventilation duct according to the preset purification ventilation duct size; determining the real-time air volume of the main pipe according to the cross-sectional area of ​​the main pipe and the main pipe wind speed; comparing the required air volume of the main pipe with the real-time air volume of the main pipe; if the real-time air volume of the main pipe is within the preset error range of the required air volume of the main pipe, determining that the fan operates at a first operating frequency, and the exhaust volume of the fan remains unchanged; if the real-time air volume of the main pipe is not within the preset error range of the required air volume of the main pipe, adjusting the first operating frequency according to the preset air volume-frequency correspondence rule until the real-time air volume of the main pipe is within the preset error range of the required air volume of the main pipe.

[0012] Furthermore, the steps of the electrical control box acquiring branch pipe detection data sent by each branch pipe control component and adjusting the opening of the corresponding air valve for each exhaust branch pipe based on the branch pipe detection data include: acquiring the real-time wind speed of each branch pipe sent by the wind speed acquisition sensor; determining the cross-sectional area of ​​each exhaust branch pipe based on the pre-set exhaust branch pipe size; determining the real-time air volume of each exhaust branch pipe based on the real-time wind speed and the corresponding cross-sectional area; comparing the real-time wind speed of each exhaust branch pipe with the preset branch pipe air volume; if the real-time air volume is within the preset error range of the preset branch pipe air volume, determining that the opening of the air valve corresponding to the current exhaust branch pipe remains unchanged; if the real-time air volume is not within the preset error range of the preset branch pipe air volume, adjusting the opening of the air valve according to the preset adjustment angle until the real-time air volume is within the preset error range of the preset branch pipe air volume.

[0013] Furthermore, the method also includes: the electrical control box acquiring the total electrical energy consumed by the smoke exhaust structure during operation within each preset time period; the electrical control box determining the proportion of electrical energy consumed by the corresponding damper of each exhaust branch pipe based on the ratio between the real-time airflow of each exhaust branch pipe and the real-time airflow of the main pipe within the current preset time period; determining the branch pipe electrical energy consumed by each exhaust branch pipe based on the total electrical energy and the proportion of electrical energy; and sending the total electrical energy and branch pipe electrical energy to the cloud platform so that the cloud platform can accumulate the branch pipe electrical energy of each exhaust branch pipe according to a preset time period.

[0014] Furthermore, the method also includes: the cloud platform obtaining the user's input of the single-unit electricity cost and the branch number of the exhaust branch pipe for which the electricity cost is to be calculated; determining the accumulated branch pipe energy corresponding to the exhaust branch pipe for which the electricity cost is to be calculated based on the branch pipe number; and determining the electricity cost of the exhaust branch pipe for which the electricity cost is to be calculated based on the single-unit electricity cost.

[0015] This invention provides a central smoke exhaust system and a method for controlling its exhaust volume. The system includes: a main inlet duct, at least one exhaust branch duct, an electrical control box, a main air velocity sensor, a branch duct control component, and a smoke exhaust structure. The branch duct control component includes a damper. The outlet of the exhaust branch duct is connected to the main inlet duct. The smoke exhaust structure is located at the outlet end of the main inlet duct. The main air velocity sensor is located in the smoke exhaust structure and is used to collect the main air velocity of the main inlet duct. Each exhaust branch duct is equipped with a branch duct control component, which collects branch duct detection data. The electrical control box is communicatively connected to both the main air velocity sensor and the branch duct control component. The electrical control box adjusts the opening of the damper and the exhaust volume of the smoke exhaust structure based on the branch duct detection data and the main air velocity. In this method, the electrical control box adjusts the exhaust volume of the fan and the opening of the damper, thereby achieving precise control of the exhaust volume at each branch duct terminal and improving the exhaust effect of each branch duct terminal.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of a central smoke exhaust system provided in Embodiment 1 of the present invention;

[0020] Figure 2 A flowchart of the exhaust volume control method for a central smoke exhaust system provided in Embodiment 2 of the present invention;

[0021] Figure 3 This is a flowchart of a method for determining the first operating frequency of a fan according to Embodiment 2 of the present invention;

[0022] Figure 4 A flowchart of a method for adjusting the exhaust volume of a fan according to Embodiment 2 of the present invention;

[0023] Figure 5 This is a flowchart of a method for adjusting the opening degree of the air valve corresponding to the exhaust branch pipe, as provided in Embodiment 2 of the present invention.

[0024] Figure 6 This is a flowchart of branch pipe power calculation provided in Embodiment 2 of the present invention;

[0025] Figure 7 This is a flowchart for calculating electricity costs provided in Embodiment 2 of the present invention.

[0026] Icons: 101-Electrical control box; 104-Main wind speed sensor; 105-Fan box; 106-Silencer; 107-Purified ventilation duct; 108-Electrostatic purification unit; 109-Main air inlet duct; 110-Cloud platform; 1n5-Air valve; 1n6-Air valve controller; 1n7-Branch wind speed sensor; 1n8-Exhaust branch duct. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions 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, 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.

[0028] To facilitate understanding of this embodiment, the embodiments of the present invention will be described in detail below.

[0029] Example 1:

[0030] Figure 1 This is a schematic diagram of a central smoke exhaust system provided in Embodiment 1 of the present invention.

[0031] Reference Figure 1 The central smoke exhaust system includes an air inlet main duct 109, at least one exhaust branch duct 1n8 (118, 128, where n is not 0), an electrical control box 101, a main wind speed acquisition sensor 104, a branch duct control assembly, and a smoke exhaust structure. The branch duct control assembly includes air valves 1n5 (115, 125, where n is not 0). The outlet of the exhaust branch duct 1n8 is connected to the air inlet main duct 109. The smoke exhaust structure is located at the outlet end of the air inlet main duct 109.

[0032] Here, each exhaust branch pipe 1n8 corresponds to a unique branch pipe number. The electrical control box 101 is connected to the branch pipe control component via a wired communication line.

[0033] The main wind speed sensor 104 is installed in the smoke exhaust structure to collect the main wind speed F of the main air intake duct 109.

[0034] Here, the main wind speed sensor 104 is also used to send the main pipe wind speed F to the electrical control box 101. The type and installation method of the wind speed sensor are limited to ensure that accurate wind speed values ​​are collected within the duct, so as to facilitate the calculation of the air volume within the duct based on the collected wind speed, and then perform air volume adjustment and control.

[0035] Each exhaust branch pipe 1n8 is equipped with a branch pipe control component, which is used to collect branch pipe detection data of the exhaust branch pipe.

[0036] The electrical control box 101 is connected to the main wind speed acquisition sensor 104 and the branch pipe control component. The electrical control box 101 is used to adjust the opening of the air valve 1n5 and the exhaust volume of the smoke exhaust structure according to the branch pipe detection data and the main pipe wind speed F.

[0037] Here, the electrical control box 101 can be installed around the central smoke exhaust structure, either indoors or outdoors, depending on the actual site conditions.

[0038] In one embodiment, reference is made to Figure 1 The branch pipe control assembly also includes a branch wind speed acquisition sensor 1n7 (117, 127, where n is not 0) and a damper controller 1n6 (116, 126, where n is not 0); the damper controller 1n6 is connected to the damper 1n5; the branch wind speed acquisition sensor 1n7 and the damper controller 1n6 are respectively connected to the electrical control box 101 for communication.

[0039] Here, the air valve controller 1n6 can be installed on the valve body of the air valve 1n5, or it can be set independently around the air valve 1n5.

[0040] The damper controller 1n6 is used to open the damper 1n5 after receiving an opening signal from the user, and to send the opening signal to the electrical control box 101.

[0041] Here, the damper controller 1n6 is used to control the opening, closing, and opening angle of the damper 1n5.

[0042] The branch wind speed sensor 1n7 is used to monitor the branch wind speed of the exhaust branch pipe 1n8 in real time and send the branch wind speed to the electrical control box 101.

[0043] The electrical control box 101 is used to calculate the real-time air volume of the exhaust branch pipe 1n8 based on the current branch pipe wind speed after receiving the opening signal, compare the real-time air volume of the branch pipe with the preset branch pipe air volume to obtain the first comparison result, and send the air valve 1n5 control signal to the air valve controller 1n6 corresponding to the exhaust branch pipe 1n8 based on the first comparison result.

[0044] Here, the preset branch air volume of each exhaust branch 1n8 is completely different. The preset branch air volume is set in advance according to the actual size of different exhaust branch 1n8. Among them, the real-time branch air volume CFMn: CFMn = Fn × Sn.

[0045] The electrical control box 101 is connected to the air valve controller 1n6 via a wired communication line, so that a communication line connection is established between the electrical control box 101 and each air valve controller 1n6.

[0046] The damper controller 1n6 is also used to adjust the opening degree of damper 1n5 according to the control signal of damper 1n5.

[0047] Specifically, the real-time air volume of the branch pipe is compared with the preset branch pipe air volume. If the real-time air volume of the branch pipe is within the preset range of the preset branch pipe air volume, the angle of the damper 1n5 remains unchanged. If the real-time air volume of the branch pipe is not within the preset range of the preset branch pipe air volume, the opening of the damper 1n5 is adjusted by the damper controller 1n6 so that the real-time air volume of the exhaust branch pipe 1n8 reaches the preset branch pipe air volume.

[0048] In one embodiment, reference is made to Figure 1 The smoke exhaust structure includes an electrostatic purification unit 108, a purification ventilation duct 107, and a fan box 105 connected in sequence. A fan is installed in the fan box 105. The fan is connected to the electrical control box 101. The main wind speed acquisition sensor 104 is installed in the purification ventilation duct 107. The electrostatic purification unit 108 is connected to the outlet end of the main air inlet duct 109.

[0049] Here, the smoke exhaust structure also includes a silencer 106. The main air intake duct 109 transports the oil fumes collected from each exhaust branch duct 1n8 to the smoke exhaust structure, so that the smoke exhaust structure discharges the purified oil fumes into the air. This reduces the pollution of oil fumes to the environment. Among them, the electrostatic purification unit 108 mainly functions to electrostatically purify the oil fume gas transported from the main air intake duct 109 to remove oil fume particles. The purification ventilation duct 107 mainly functions to transport the purified oil fumes to the fan for exhaust. The fan in the fan box 105 is mainly used to create negative pressure in each exhaust branch duct 1n8 to adsorb oil fumes before exhausting them. The silencer 106 mainly functions to reduce the noise generated by the fan in the fan box 105.

[0050] The main air speed sensor 104 is used to monitor the main air speed of the purification ventilation duct 107 in real time and send the main air speed to the electrical control box 101.

[0051] The electrical control box 101 is used to acquire the opening signal sent by each branch pipe control component, determine the number of open valves 1n5 in the open state based on the number of opening signals, determine the main pipe demand air volume and the first operating frequency of the fan based on the number of open valves and the preset branch pipe air volume, so that the fan operates at the first operating frequency; calculate the main pipe real-time air volume of the purification ventilation duct 107 based on the main pipe wind speed, compare the main pipe real-time air volume with the main pipe demand air volume to obtain a second comparison result, and adjust the exhaust volume of the fan based on the second comparison result.

[0052] Here, the number of activation signals is the same as the number of open valves 1n5 that are in the open state.

[0053] Specifically, the preset branch air volume of each exhaust branch pipe 1n8 when the air valve 1n5 is in the open state is added together to obtain the required air volume of the main pipe. The first operating frequency of the fan is determined according to the preset air volume-frequency correspondence rule of the fan.

[0054] Calculate the cross-sectional area Sz of the purification ventilation duct 107 according to the actual installation dimensions, and calculate the real-time air volume CFMz of the main pipe of the purification ventilation duct 107 based on the main pipe wind speed: CFMz=F×Sz.

[0055] The real-time airflow of the main pipe is compared with the required airflow of the main pipe. If the real-time airflow of the main pipe is within the preset error range of the required airflow of the main pipe, the fan is set to operate at the first operating frequency, and the exhaust volume of the fan remains unchanged. If the real-time airflow of the main pipe is not within the preset error range of the required airflow of the main pipe, the first operating frequency is adjusted according to the preset airflow-frequency correspondence rule until the real-time airflow of the main pipe is within the preset error range of the required airflow of the main pipe.

[0056] In one embodiment, reference is made to Figure 1The central smoke exhaust system also includes a cloud platform 110; the electrical control box 101 is connected to the cloud platform 110.

[0057] Here, the electrical control box 101 and the cloud platform 110 are connected wirelessly for data exchange. The cloud platform 110 can store the data uploaded by the electrical control box 101, and staff can also remotely control or configure the parameters of the electrical control box 101 through the cloud platform 110.

[0058] The electrical control box 101 is also used to obtain the total electrical energy consumed by the smoke exhaust structure during operation in each preset time period and the proportion of electrical energy consumed by the air valve 1n5 corresponding to each exhaust branch pipe 1n8 in the current preset time period, thereby determining the branch pipe electrical energy consumed by each exhaust branch pipe 1n8, and sending the total electrical energy and branch pipe electrical energy to the cloud platform 110.

[0059] Here, the preset time period is only for the frequency of data collection. In actual implementation, it is not limited by the length of the time period. That is, the frequency of data collection during calculation can be adjusted appropriately based on the computing and storage capabilities of the product and platform. It can be set to a time period of 60 seconds, with the electrical control box 101 calculating the total power every 60 seconds.

[0060] The electrical energy is allocated based on the ratio between the air volume consumed by the damper 1n5 corresponding to each exhaust branch 1n8 and the air volume of the main pipe during the current time period, thus determining the electrical energy consumed by each exhaust branch 1n8. Exhaust branch 1n8 without open valves does not receive any share of the electrical energy consumed and is recorded as 0.

[0061] The cloud platform 110 is used to store the total power and branch power sent by the electrical control box 101, and to accumulate the branch power according to a preset time period for users to query.

[0062] Here, the electrical control box 101 automatically allocates the energy consumption value of each exhaust branch pipe 1n8 within a time period of 60 seconds, and reports it to the cloud platform 110. The cloud platform 110 archives and records the power consumption data, so that the cloud platform 110 can read the power usage of each exhaust branch pipe 1n8 in real time.

[0063] When staff need to query the electricity consumption of any exhaust branch pipe 1n8, the cloud platform 110 can calculate the cumulative electricity consumption of each exhaust branch pipe 1n8 by 24 hours, week, or month, so that staff can query the electricity consumption for each time period.

[0064] When staff need to calculate electricity costs, they can input the cost per kilowatt-hour on the cloud platform 110 to calculate the electricity cost required for any exhaust branch pipe 1n8.

[0065] In this embodiment, because the communication between the electrical control box 101 and the cloud platform 110, or between the electrical control box 101 and each air valve controller 1n6, whether using wireless or wired communication methods, communication failures may occur during real-time communication, resulting in the loss of communication frame data. To avoid this data loss, this embodiment incorporates data storage mechanisms on both the air valve controller 1n6 and the electrical control box 101, temporarily storing recent data locally. When the electrical control box 101 or the cloud platform 110 detects a point in time or a period of time without receiving relevant information, the cloud platform 110 can re-query the electrical control box 101, and the electrical control box 101 can re-query the data information of the air valve controller 1n6, establishing a mechanism for retransmitting lost data to replenish all previous data.

[0066] In one embodiment, reference is made to Figure 1 The central smoke exhaust system also includes at least one branch pipe terminal; the branch pipe terminal is connected to the air inlet of the exhaust branch pipe 1n8; the branch pipe terminal is set up correspondingly to the exhaust branch pipe 1n8.

[0067] Here, the branch pipe terminals are various users connected to the same central smoke exhaust system, such as businesses and restaurants. Each branch pipe terminal includes a smoke collection hood.

[0068] This invention provides a central smoke exhaust system, comprising: a main air inlet duct, at least one exhaust branch duct, an electrical control box, a main air velocity sensor, a branch duct control component, and a smoke exhaust structure. The branch duct control component includes an air valve. The outlet of the exhaust branch duct is connected to the main air inlet duct. The smoke exhaust structure is located at the outlet end of the main air inlet duct. The main air velocity sensor is located in the smoke exhaust structure and is used to collect the main air velocity of the main air inlet duct. Each exhaust branch duct is equipped with a branch duct control component, which is used to collect branch duct detection data. The electrical control box is communicatively connected to both the main air velocity sensor and the branch duct control component. The electrical control box is used to adjust the opening degree of the air valve and the exhaust volume of the smoke exhaust structure based on the branch duct detection data and the main air velocity. In this method, the exhaust volume of the fan and the opening degree of the air valve are adjusted by the electrical control box, thereby achieving precise control of the exhaust volume at each branch duct terminal and improving the exhaust effect of each branch duct terminal. Meanwhile, the electrical control box is connected to the cloud platform, which can read the power usage and electricity costs of each branch terminal, thereby enabling accurate calculation of electricity costs, allowing users to use the central smoke exhaust equipment reasonably, enabling users to consciously control the smoke exhaust, making the electricity cost sharing more reasonable and reducing operating costs.

[0069] Example 2:

[0070] Figure 2 This is a flowchart of the air volume control method for a central smoke exhaust system provided in Embodiment 2 of the present invention.

[0071] Reference Figure 2 The exhaust volume control methods applied to the above-mentioned central smoke exhaust equipment include:

[0072] In step S101, the damper controller receives the opening signal sent by the user, opens the corresponding damper according to the opening signal, and sends the opening signal to the electrical control box.

[0073] Here, each air valve controller corresponds to a branch terminal. When a user opens their own branch terminal, the air valve controller opens its corresponding air valve according to the opening signal.

[0074] In step S102, the electrical control box obtains the opening signal sent by each air valve controller and determines the number of air valves in the open state based on the number of opening signals.

[0075] Here, the electrical control box receives the opening signals sent by all the air valve controllers; that is, the number of opening signals is the number of valves opened.

[0076] In step S103, the electrical control box determines the first operating frequency of the fan based on the number of valves opened and the preset branch pipe air volume.

[0077] In one embodiment, reference is made to Figure 3 Step S103 includes:

[0078] Step S201: Determine the required air volume of the main pipe of the central smoke exhaust system based on the number of valves to be opened and the preset branch pipe air volume.

[0079] Here, the preset air volume of each exhaust branch is completely different, and the preset air volume is set in advance according to the actual size of each exhaust branch. The preset air volume of each exhaust branch with the air valve in the open state is added together to obtain the required air volume of the main pipe.

[0080] Step S202: Determine the first operating frequency of the fan according to the preset air volume-frequency correspondence rule and the main air volume requirement.

[0081] Here, the preset air volume-frequency correspondence rule is preset according to the fan model.

[0082] In step S104, the electrical control box acquires the main pipe wind speed sent by the main wind speed acquisition sensor and adjusts the exhaust volume of the fan according to the main pipe wind speed.

[0083] In one embodiment, reference is made to Figure 4 Step S104 includes:

[0084] Step S301: Determine the cross-sectional area of ​​the main purification ventilation duct according to the pre-set purification ventilation duct size.

[0085] Here, the cross-sectional area of ​​the main ventilation duct is Sz.

[0086] Step S302: Determine the real-time air volume of the main pipe based on the cross-sectional area and wind speed of the main pipe.

[0087] Here, the main air velocity is F, and the real-time air volume of the main air duct is CFMz: CFMz = F × Sz.

[0088] Step S303: Compare the required air volume of the main supervisor with the real-time air volume of the main supervisor.

[0089] Step S304: If the real-time air volume of the main pipe is within the preset error range of the air volume required by the main pipe, determine that the fan operates at the first operating frequency and the exhaust volume of the fan remains unchanged.

[0090] Step S305: If the real-time air volume of the main pipe is not within the preset error range of the required air volume of the main pipe, adjust the first operating frequency according to the preset air volume-frequency correspondence rule until the real-time air volume of the main pipe is within the preset error range of the required air volume of the main pipe.

[0091] Here, the preset error range is set in advance according to the actual situation.

[0092] When the real-time air volume of the main pipe is not within the preset error range of the required air volume of the main pipe, the frequency of the fan is appropriately increased or decreased through the electrical control box until the real-time air volume of the main pipe is within the preset error range of the required air volume of the main pipe.

[0093] In step S105, the electrical control box acquires the branch pipe detection data sent by each branch pipe control component and adjusts the opening degree of the corresponding air valve for each exhaust branch pipe according to the branch pipe detection data.

[0094] In one embodiment, reference is made to Figure 5 Step S105 includes:

[0095] Step 401: Obtain the real-time wind speed of each branch pipe sent by the branch wind speed acquisition sensor.

[0096] Here, the real-time wind speed of the branch pipe is Fn, where n is the corresponding number of the branch pipe terminal and n is not 0.

[0097] Step S402: Determine the cross-sectional area of ​​each exhaust branch pipe according to the pre-set exhaust branch pipe size.

[0098] Here, the pipe size of the exhaust branch pipe is the actual installation size of the exhaust branch pipe. Each exhaust branch pipe corresponds to one exhaust branch pipe size, and the cross-sectional area of ​​each exhaust branch pipe is Sn.

[0099] Step S403: Determine the real-time air volume of each exhaust branch pipe based on the real-time wind speed of the branch pipe and the corresponding cross-sectional area of ​​the branch pipe.

[0100] Here, the real-time air volume of the branch pipe is CFMn: CFMn = Fn × Sn.

[0101] Step S404: Compare the real-time wind speed of each exhaust branch pipe with the preset branch pipe air volume.

[0102] Step S405: If the real-time air volume of the branch pipe is within the preset error range of the preset branch pipe air volume, determine that the opening degree of the air valve corresponding to the current exhaust branch pipe remains unchanged.

[0103] Step S406: If the real-time air volume of the branch pipe is not within the preset error range of the preset branch pipe air volume, adjust the opening of the air valve according to the preset adjustment angle until the real-time air volume of the branch pipe is within the preset error range of the preset branch pipe air volume.

[0104] Here, if the real-time air volume of the branch pipe is not within the preset error range of the preset branch pipe air volume, the opening of the air valve is appropriately increased or decreased according to the preset adjustment angle until the real-time air volume of the branch pipe is within the preset error range of the preset branch pipe air volume.

[0105] In one embodiment, reference is made to Figure 6 The methods also include:

[0106] In step S502, the electrical control box obtains the total electrical energy consumed by the smoke exhaust structure during operation within each preset time period.

[0107] Here, the total electrical energy is Qz. The electrical control box can automatically allocate the electrical energy consumption value of each exhaust branch pipe in 60-second time intervals and report it to the cloud platform. The cloud platform archives and records the power consumption data, so the power usage of each exhaust branch pipe can be read in real time on the cloud platform.

[0108] Step S502: The electrical control box determines the proportion of electrical energy consumed by the corresponding air valve of each exhaust branch pipe based on the ratio between the real-time air volume of each exhaust branch pipe and the real-time air volume of the main pipe within the current preset time period.

[0109] Here, electrical energy is allocated based on the ratio between the air volume consumed by the corresponding air valves of each exhaust branch pipe and the air volume of the main pipe during the current time period, thus determining the electrical energy consumed by each exhaust branch pipe. Exhaust branch pipes without open valves do not receive any share of the electrical energy consumed and are recorded as 0.

[0110] Step S503: Determine the branch pipe power consumption of each exhaust branch pipe based on the total power and power percentage.

[0111] Step S504: The total power and branch pipe power are sent to the cloud platform so that the cloud platform can accumulate the branch pipe power of each exhaust branch pipe according to a preset time period.

[0112] In one embodiment, reference is made to Figure 7The methods also include:

[0113] Step S601: The cloud platform obtains the user-inputted single-unit electricity cost and the branch pipe number of the exhaust branch pipe for which the electricity cost to be calculated.

[0114] Step S602: Determine the accumulated branch power of the exhaust branch to be calculated based on the branch number, and determine the electricity cost of the exhaust branch to be calculated based on the electricity cost per kilowatt-hour.

[0115] Here, when staff need to check the electricity consumption of any exhaust branch pipe, the cloud platform can accumulate the electricity consumption of each exhaust branch pipe by 24 hours, week, or month, so that staff can check the electricity consumption for each time period.

[0116] When staff need to calculate electricity costs, they can input the cost per kilowatt-hour into the cloud platform to calculate the electricity cost for any exhaust branch pipe.

[0117] This invention provides a method for controlling the exhaust volume of a central smoke extraction system. In this method, the exhaust volume of the fan and the opening degree of the damper are adjusted via an electrical control box, thereby achieving precise control of the exhaust volume of each branch terminal and improving the exhaust effect of each branch terminal. Simultaneously, the electrical control box is connected to a cloud platform, which can read the power usage and electricity costs of each branch terminal, enabling accurate electricity cost calculation. This allows users to use the central smoke extraction system more rationally, consciously control exhaust volume, and achieve more reasonable electricity cost sharing, thus reducing operating costs.

[0118] The computer program product provided in this embodiment of the invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation details, please refer to the method embodiments, which will not be repeated here.

[0119] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0120] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 the present invention based on the specific circumstances.

[0121] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0122] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0123] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A central smoke exhaust system, characterized in that, include: The system includes a main air inlet duct, at least one exhaust branch duct, an electrical control box, a main wind speed sensor, a branch duct control assembly, and a smoke exhaust structure; the branch duct control assembly includes an air valve; the outlet of the exhaust branch duct is connected to the main air inlet duct; and the smoke exhaust structure is located at the outlet end of the main air inlet duct. The main wind speed acquisition sensor is installed in the smoke exhaust structure and is used to acquire the main wind speed of the main air intake duct. Each of the exhaust branch pipes is equipped with a branch pipe control component, which is used to collect the branch pipe detection data of the exhaust branch pipe; The electrical control box is communicatively connected to the main wind speed acquisition sensor and the branch pipe control component, respectively. The electrical control box is used to adjust the opening degree of the air valve and the exhaust volume of the smoke exhaust structure according to the branch pipe detection data and the main wind speed. The smoke exhaust structure includes an electrostatic purification unit, a purification ventilation duct, and a fan box connected in sequence. A fan is installed in the fan box. The fan is communicatively connected to the electrical control box. The main wind speed acquisition sensor is installed in the purification ventilation duct. The electrostatic purification unit is connected to the outlet end of the main air inlet duct. The main wind speed acquisition sensor is used to monitor the main wind speed of the purification ventilation duct in real time and send the main wind speed to the electrical control box. The electrical control box is used to acquire the opening signal sent by each of the branch pipe control components, determine the number of valves in the open state based on the number of opening signals, determine the main pipe required air volume and the first operating frequency of the fan based on the number of valves and the preset branch pipe air volume, so that the fan operates at the first operating frequency; calculate the real-time air volume of the main pipe of the purification ventilation duct based on the main pipe wind speed, compare the real-time air volume of the main pipe with the main pipe required air volume to obtain a second comparison result, and adjust the exhaust volume of the fan based on the second comparison result; The central smoke exhaust system also includes a cloud platform; the electrical control box is communicatively connected to the cloud platform; the branch pipe control component also includes a damper controller; both the damper controller and the electrical control box are designed with a data storage mechanism to temporarily store data within a recent period on the local end; when the cloud platform identifies a point in time or a period of time without receiving relevant information, the cloud platform re-queries the electrical control box, so that the electrical control box re-queries the data information of the damper controller, establishing a mechanism for resending lost data at each end to complete the data.

2. The central smoke exhaust system according to claim 1, characterized in that, The branch pipe control assembly also includes a branch wind speed acquisition sensor; the air valve controller is connected to the air valve; the branch wind speed acquisition sensor and the air valve controller are respectively communicatively connected to the electrical control box; The air valve controller is used to open the air valve after receiving an opening signal sent by the user, and to send the opening signal to the electrical control box. The branch wind speed acquisition sensor is used to monitor the branch wind speed of the exhaust branch in real time and send the branch wind speed to the electrical control box; The electrical control box is used to calculate the real-time air volume of the exhaust branch pipe based on the current branch pipe wind speed after receiving the opening signal, compare the real-time air volume of the branch pipe with the preset branch pipe air volume to obtain a first comparison result, and send a damper control signal to the damper controller corresponding to the exhaust branch pipe based on the first comparison result. The air valve controller is also used to adjust the opening degree of the air valve according to the air valve control signal.

3. The central smoke exhaust system according to claim 2, characterized in that, The electrical control box is communicatively connected to the cloud platform; The electrical control box is also used to obtain the total electrical energy consumed by the smoke exhaust structure during operation within each preset time period and the proportion of electrical energy consumed by the air valve corresponding to each exhaust branch pipe within the current preset time period, thereby determining the branch pipe electrical energy consumed by each exhaust branch pipe, and sending the total electrical energy and the branch pipe electrical energy to the cloud platform. The cloud platform is used to store the total power and branch power sent by the electrical control box, and to accumulate the branch power according to a preset time period for user query.

4. The central smoke exhaust system according to claim 1, characterized in that, The central smoke exhaust system also includes at least one branch pipe terminal; the branch pipe terminal is connected to the air inlet of the exhaust branch pipe; the branch pipe terminal is configured correspondingly to the exhaust branch pipe.

5. A method for controlling the exhaust volume of a central smoke exhaust system, characterized in that, The method for controlling the exhaust volume is applied to the central smoke exhaust system according to any one of claims 1-4; the method includes: The damper controller receives the opening signal sent by the user, opens the corresponding damper according to the opening signal, and sends the opening signal to the electrical control box; The electrical control box receives the opening signal sent by each air valve controller and determines the number of air valves in the open state based on the number of opening signals. The electrical control box determines the first operating frequency of the fan based on the number of valves opened and the preset branch pipe air volume; The electrical control box acquires the main wind speed sent by the main wind speed acquisition sensor, and adjusts the exhaust volume of the fan according to the main wind speed; The electrical control box acquires the branch pipe detection data sent by each branch pipe control component, and adjusts the opening degree of the corresponding air valve for each exhaust branch pipe according to the branch pipe detection data; The step of determining the first operating frequency of the fan based on the number of valves opened and the preset branch pipe air volume in the electrical control box includes: The required air volume of the main pipe of the central smoke exhaust equipment is determined based on the number of valves to be opened and the preset branch pipe air volume. The first operating frequency of the fan is determined according to the preset air volume-frequency correspondence rule and the main air volume requirement. The method further includes: the air valve controller and the electrical control box temporarily store the data of the most recent period on their local terminals; when the cloud platform identifies a point in time or a period of time without receiving relevant information, the cloud platform re-queries the electrical control box so that the electrical control box re-queries the data information of the air valve controller, and establishes a mechanism for each terminal to resend lost data to complete the data.

6. The exhaust volume control method according to claim 5, characterized in that, The step of the electrical control box acquiring the main pipe wind speed sent by the main wind speed acquisition sensor and adjusting the exhaust volume of the fan according to the main pipe wind speed includes: The cross-sectional area of ​​the main duct of the purification ventilation duct is determined based on the pre-set dimensions of the purification ventilation duct. The real-time air volume of the main pipe is determined based on the cross-sectional area of ​​the main pipe and the wind speed of the main pipe. Compare the required air volume of the supervisor with the real-time air volume of the supervisor. If the real-time air volume of the main pipe is within the preset error range of the air volume required by the main pipe, it is determined that the fan operates at the first operating frequency and the exhaust volume of the fan remains unchanged. If the real-time air volume of the main pipe is not within the preset error range of the air volume required by the main pipe, the first operating frequency is adjusted according to the preset air volume-frequency correspondence rule until the real-time air volume of the main pipe is within the preset error range of the air volume required by the main pipe.

7. The exhaust volume control method according to claim 5, characterized in that, The steps of the electrical control box acquiring branch pipe detection data sent by each branch pipe control component and adjusting the opening degree of the corresponding air valve for each exhaust branch pipe according to the branch pipe detection data include: Obtain the real-time wind speed of each branch pipe sent by the wind speed acquisition sensor; The cross-sectional area of ​​each exhaust branch pipe is determined based on the pre-set exhaust branch pipe size. The real-time air volume of each exhaust branch is determined based on the real-time wind speed of the branch and the corresponding cross-sectional area of ​​the branch. The real-time wind speed of each of the exhaust branch pipes is compared with the preset branch pipe air volume. If the real-time air volume of the branch pipe is within the preset error range of the preset branch pipe air volume, the opening degree of the air valve corresponding to the current exhaust branch pipe is determined to remain unchanged; If the real-time air volume of the branch pipe is not within the preset error range of the preset branch pipe air volume, the opening of the air valve is adjusted according to the preset adjustment angle until the real-time air volume of the branch pipe is within the preset error range of the preset branch pipe air volume.

8. The exhaust volume control method according to claim 5, characterized in that, The method further includes: The electrical control box obtains the total electrical energy consumed by the smoke exhaust structure during operation within each preset time period; The electrical control box determines the proportion of electrical energy consumed by the air valve corresponding to each exhaust branch pipe based on the ratio between the real-time air volume of each exhaust branch pipe and the real-time air volume of the main pipe within the current preset time period. Based on the total electrical energy and the percentage of electrical energy consumed, determine the branch pipe electrical energy consumed by each of the exhaust branch pipes; The total electrical energy and the branch pipe electrical energy are sent to the cloud platform so that the cloud platform can accumulate the branch pipe electrical energy of each exhaust branch pipe according to a preset time period.

9. The exhaust volume control method according to claim 8, characterized in that, The method further includes: The cloud platform obtains the user's input of the electricity cost per kilowatt-hour and the branch pipe number of the exhaust branch pipe for which the electricity cost to be calculated; The cumulative electrical energy of the exhaust branch corresponding to the branch number is determined, and the electricity cost of the exhaust branch is determined based on the electricity cost per kilowatt-hour.

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