Range hood control system

Abstract

The invention discloses a range hood control system which comprises a range hood main fan and a main fan control system, a plurality of sub-range hoods are arranged on the surface of a public flue and distributed at users of all floors, air pressure sensors are arranged in the public flue and the sub-range hoods, adjustable air doors are arranged in the sub-range hoods, and the main fan control system is connected with the main fan control system. The main draught fan control system is electrically connected with the air pressure sensor, the sub-range hoods, the adjustable air doors and the range hood main draught fan, the range hood control system monitors the air pressure of the public flue, the air pressure of the air doors of all the sub-range hoods and the real-time gear air volume requirements of all the sub-range hoods in real time through the main draught fan control system, and operation is conducted based on a specific algorithm. And the operation of each sub-range hood can be effectively coordinated. Under the condition that multiple households in a high-rise residence use range hoods at the same time, the system can dynamically adjust the exhaust air rate of the main fan of the range hood and the size of the air door of each sub-range hood according to the actual situation, so that the air pressure balance in a public flue is ensured, the phenomena of unsmooth smoke exhaust and oil smoke backflow are avoided, and the smoke exhaust efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of intelligent household appliances, and in particular relates to a range hood control system. Background Art

[0002] In modern buildings, range hoods are important equipment for kitchen exhaust and ventilation. However, in the field of modern construction engineering, especially in the context of the continuous development of high-rise residential construction, some high-rise buildings in cities use public flues as kitchen flues for each household, that is, the range hoods of each household in the building are connected to the public flue, making the exhaust conditions of the public flue increasingly complicated. In high-rise residential buildings, it is common for multiple households to use range hoods at the same time, which leads to frequent and drastic changes in the wind pressure in the public flue. As the common channel for exhausting smoke from range hoods of each household, the pressure balance of the public flue is extremely critical. However, most of the existing range hood systems are based on the independent design concept of each household. Each household's range hood operates independently and lacks a unified coordination and management mechanism. As the number of floors of the building increases, the exhaust pressure of the public flue gradually increases. In high-rise residential buildings, when multiple households use range hoods at the same time, the wind pressure in the public flue will change drastically, which can easily lead to poor exhaust and even oil fume backflow. Due to the lack of effective overall coordination and control, it is impossible to dynamically adjust the exhaust volume of the public flue according to the actual pressure of the public flue and the usage needs of other users. This not only affects the user experience, but may also have an adverse effect on the indoor air quality. Summary of the invention

[0003] The object of the present invention is to provide a range hood control system to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a range hood control system, comprising: A main fan of a range hood, which is used to provide exhaust power for the entire building and is connected to a public flue at the bottom. A plurality of sub-range hoods are arranged on the surface of the public flue, and the sub-range hoods are distributed at the users on each floor. Wind pressure sensors are arranged in the public flue and the sub-range hoods to monitor the wind pressure in the public flue. An adjustable damper is arranged in the sub-range hood; The total fan control system is electrically connected to the wind pressure sensor, sub-range hoods, adjustable dampers and the total fan of the range hood. The total fan control system calculates the pressure difference between the flue and the damper wind pressure through a specific algorithm based on the common flue wind pressure and the air volume level requirements set by the users of each sub-range hood, and then controls the size of the sub-range hood dampers and the exhaust volume of the total fan motor of the range hood.

[0005] Preferably, the total fan control system acquires and processes in real time the wind pressure of the common flue, the damper wind pressure of all sub-range hoods, and the real-time gear air volume requirements of each sub-range hood, and continuously adjusts the exhaust volume of the total fan of the range hood and the damper size of each sub-range hood based on these data to balance the exhaust volume requirements of all users.

[0006] Preferably, the specific algorithm specifically includes monitoring the wind pressure of the common flue, monitoring the air pressure of all sub-range hoods with dampers, collecting the real-time gear air volume requirements of all sub-range hoods and transmitting them to the main fan control system for calculation, the main fan control system reading the user air volume gear settings of the sub-range hoods, calculating the pressure difference on both sides of the flue and the air pressure of the damper, controlling the size of the adjustable damper of the sub-range hood and the motor exhaust volume value of the main fan of the range hood, and balancing the exhaust volume requirements of all users through the algorithm.

[0007] Preferably, the maximum output air volume value of the range hood total fan is determined by the air volume setting of the sub-range hood, the air pressure difference between the common flue and the sub-range hood flue, and the size of the adjustable damper controlled in real time.

[0008] Preferably, the main fan of the range hood controls the size of the adjustable air door according to the wind pressure value in the sub-range hood and the high setting of the switch gear of the sub-range hood.

[0009] Preferably, the sub-range hood is equipped with an air monitoring module, the air monitoring module detects air quality, the main fan control system is electrically connected to the air monitoring module, and the sub-range hood is controlled to open an adjustable damper for automatic ventilation according to the detection result of the air monitoring module.

[0010] Preferably, the adjustable damper comprises an air duct and an adjusting motor, a ventilation duct is connected to the surface of the sub-range hood, one end of the ventilation duct is connected to the air duct and the other end of the air duct is connected to the public flue.

[0011] Preferably, the regulating motor is arranged on the surface of the air duct, and the output shaft of the regulating motor rotates through the air duct and is connected to the regulating valve, and the regulating valve is rotatably connected in the air duct.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The range hood control system of the present invention monitors the wind pressure of the common flue, the wind pressure of all sub-range hood dampers, and the real-time gear air volume requirements of each sub-range hood in real time through the total fan control system, and performs calculations based on a specific algorithm, which can effectively coordinate the operation of each sub-range hood. In the case where multiple households in a high-rise residential building use range hoods at the same time, the system can dynamically adjust the exhaust volume of the total fan of the range hood and the damper size of each sub-range hood according to actual conditions, to ensure the balance of wind pressure in the common flue, avoid poor exhaust and oil fume backflow, and greatly improve the exhaust efficiency. The sub-range hood is equipped with an air monitoring module. When the indoor air quality decreases, such as when a large amount of oil fume is produced after cooking or there is an odor in the kitchen, the total fan control system can automatically control the sub-range hood to open the adjustable damper for ventilation according to the monitoring results, improve the indoor air quality, help keep the indoor air fresh, and promptly remove harmful gases and odors, providing users with a healthier living environment. The total fan control system can accurately control the size of the sub-range hood damper and the exhaust volume of the total fan motor according to the user's set air volume level requirements for the sub-range hood, meeting the user's personalized requirements for exhaust volume in different cooking scenarios. Users do not need to worry about the exhaust effect being affected by changes in the public flue pressure, which improves the comfort of the kitchen operating environment and the cooking experience. The use of a unified range hood total fan provides exhaust power for the entire building. Compared with the traditional installation of a range hood with a fan in each household, the number of equipment is reduced and the equipment purchase cost is reduced. At the same time, by reasonably controlling the operation of the adjustable dampers of the total fan and sub-range hood, it can avoid energy waste, improve energy utilization efficiency, and achieve optimal integration of resources. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the sub-range hood of the present invention; Figure 3 It is a structural schematic diagram of the air duct of the present invention; Figure 4 It is a system block diagram of the present invention.

[0013] In the figure: 1. Main fan of range hood; 2. Public flue; 3. Sub-range hood; 4. Wind pressure sensor; 5. Ventilation pipe; 6. Air duct; 7. Adjustment motor; 8. Adjustment valve. DETAILED DESCRIPTION The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] The present invention provides Figure 1-4 A range hood control system shown includes: A main range hood fan 1, the main range hood fan 1 is used to provide exhaust power for the entire building and the bottom of the main range hood fan 1 is connected to a public flue 2, a plurality of sub-range hoods 3 are arranged on the surface of the public flue 2, and the plurality of sub-range hoods 3 are distributed at the users of each floor, a wind pressure sensor 4 is arranged in the public flue 2 and the sub-range hood 3, and is used to monitor the wind pressure in the public flue 2, and an adjustable damper is arranged in the sub-range hood 3; The total fan control system is electrically connected to the wind pressure sensor 4, the sub-range hood 3, the adjustable damper and the total fan 1 of the range hood. The total fan control system calculates the pressure difference between the flue and the damper wind pressure through a specific algorithm based on the wind pressure of the common flue 2 and the air volume level requirements set by the users of each sub-range hood 3, and then controls the damper size of the sub-range hood 3 and the exhaust volume of the motor of the total fan 1 of the range hood.

[0015] The total fan control system acquires and processes in real time the wind pressure of the common flue 2, the damper wind pressure of all sub-range hoods 3, and the real-time gear air volume requirements of each sub-range hood 3, and continuously adjusts the exhaust volume of the total range hood fan 1 and the damper size of each sub-range hood 3 based on these data to balance the exhaust volume requirements of all users.

[0016] The specific algorithm specifically includes monitoring the wind pressure of the common flue 2, monitoring the air pressure of all sub-range hoods 3, collecting the real-time gear air volume requirements of all sub-range hoods 3 and transmitting them to the main fan control system for calculation, the main fan control system reading the user air volume gear setting of the sub-range hood 3, calculating the pressure difference on both sides of the flue and the air pressure of the air door, controlling the size of the adjustable air door of the sub-range hood 3 and the motor exhaust volume value of the range hood main fan 1, and balancing the exhaust volume requirements of all users through the algorithm.

[0017] The maximum output air volume value of the range hood master fan 1 is determined by the air volume setting of the sub-range hood 3, the air pressure difference between the common flue 2 and the flue of the sub-range hood 3, and the size of the adjustable damper controlled in real time.

[0018] The main fan 1 of the range hood controls the size of the adjustable air door according to the wind pressure value in the sub-range hood 3 and the high setting of the switch gear of the sub-range hood.

[0019] The sub-range hood 3 is equipped with an air monitoring module, which detects air quality. The main fan control system is electrically connected to the air monitoring module, and controls the sub-range hood 3 to open an adjustable damper for automatic ventilation according to the detection result of the air monitoring module.

[0020] The adjustable damper includes an air duct 6 and an adjusting motor 7 . A ventilation duct 5 is connected to the surface of the sub-range hood 3 . One end of the ventilation duct 5 is connected to the air duct 6 and the other end of the air duct 6 is connected to the public flue 2 .

[0021] The regulating motor 7 is arranged on the surface of the air duct 6 , and the output shaft of the regulating motor 7 rotates through the air duct 6 and is connected to the regulating valve 8 , and the regulating valve 8 is rotatably connected in the air duct 6 .

[0022] The range hood control system, the wind pressure sensors 4 in the common flue 2 and the sub-range hood 3 monitor the wind pressure in the common flue 2 and the wind pressure at the damper of the sub-range hood 3 in real time, and transmit the data to the main fan control system. At the same time, the main fan control system obtains the wind volume gear requirements set by the user of each sub-range hood 3 and the real-time gear wind volume information of each sub-range hood 3. For example, the wind pressure sensor 4 collects pressure data once a second to timely reflect the pressure changes in the flue; After receiving the above data, the control system of the main fan 1 of the range hood uses a specific algorithm to perform calculations. First, the pressure difference between the flue and the damper is calculated. According to the air volume level requirements set by the user of the sub-range hood 3, combined with the air pressure difference between the public flue 2 and the flue of the sub-range hood 3, the exhaust volume value required by the main fan motor and the appropriate size of each damper of the sub-range hood 3 are determined. For example, the air volume that the main fan should output and the opening angle of the damper of the sub-range hood 3 are calculated based on the collected pressure data and user requirements; According to the results of the algorithm operation, the main fan control system sends instructions to the main fan 1 of the range hood to control the speed of its motor, thereby adjusting the exhaust volume of the main fan 1 of the range hood. At the same time, it sends signals to the regulating motor 7 in each sub-range hood 3, and the regulating motor 7 drives the regulating valve 8 to rotate, thereby changing the size of the ventilation valve of the sub-range hood 3 to achieve precise control of the ventilation volume of each sub-range hood 3. For example, if the calculation result of the main fan control system shows that the exhaust volume of the main fan 1 of the range hood needs to be increased, the main fan control system will increase the power supply frequency of the motor of the main fan 1 of the range hood, so as to speed up its speed and increase the exhaust volume of the main fan 1 of the range hood to ensure smooth smoke exhaust. For the sub-range hood 3 that needs to increase the ventilation volume, the regulating motor 7 can be rotated to increase the degree of opening of the regulating valve 8.

[0023] Algorithm logic: The air volume is determined by the specific pressure difference and ventilation area.

[0024] In this way, by increasing the total fan air volume, the negative pressure of the public flue 2 (main flue) can be increased, that is: the sub-range fan 3 damper is connected to the public flue 2 (negative pressure area), the sub-range fan 3 damper is connected to the sub-range fan 3 (atmospheric pressure area), and by adjusting the total fan air volume (motor speed), the negative pressure value of the public flue 2 can be controlled, and then by controlling the size of the sub-range fan 3 damper (that is, controlling the ventilation area), the air volume of each sub-range fan 3 can be independently controlled; Basic calculation logic: P=P1-P2 (where P: pressure difference, P1: air pressure at end 3 of sub-hood, P2: air pressure at end 2 of public flue); V=K(2P / ρ)^0.5 (where V: wind speed, K: drag coefficient, P: pressure difference, ρ: air density); Q=3600VF (where Q: exhaust volume, V: wind speed, F: ventilation area); When one of the users sets a high-end air volume, the total fan 1 of the range hood will adjust P at a value of 200Pa, and the damper of the user's range hood will be fully opened. At the same time, the total fan 1 of the range hood will also adjust the exhaust volume synchronously in accordance with the needs of all users. If the required pressure difference cannot be achieved even when the damper is fully opened, the total fan 1 of the range hood will continue to increase the exhaust volume to meet all needs, so that all users who set a high-end air volume can reach the required air volume. At the same time, there are also users who set a medium or low-end air volume. If the pressure difference is also 200Pa, the ventilation area of ​​the damper 3 of the mid-end sub-range hood is adjusted to 0.012 m2 (the above example values ​​are based on 20 cubic meters / minute for general household range hoods. The above parameters are actually defined according to the capacity of the implementation system and specific needs); The general direction of the algorithm is to adjust the exhaust volume parameters of the range hood's main fan 1 to meet the user's maximum air volume demand, and at the same time adjust the ventilation area of ​​the damper according to the real-time monitored pressure difference on both sides of the damper of each user's sub-range hood 3 to meet the air volume demand set by each user.

[0025] In addition to adjusting the damper of the sub-range hood 3 according to the user's air volume level, the sub-range hood 3 also has a ventilation function setting. The air monitoring module in the sub-range hood 3 monitors the air quality in real time. When it is detected that the air quality reaches the preset standard for ventilation, if the main fan control system enables the ventilation function and closes the range hood level, the regulating valve 8 in the air duct 6 retains a suitable opening. After the damper area retains a certain small flow rate, the user's family can achieve 24-hour ventilation. The main fan will control the size of the damper in the air duct 6 according to the wind pressure value in the air duct 6 of the sub-range hood 3 and the high setting of the switch level of the sub-range hood 3; such as: setting high-grade → damper position → meeting high-grade wind pressure difference → reaching air volume requirements (specific pressure difference and ventilation area determine the amount of air volume); The maximum output air volume of the total range hood fan 1 can meet the demand of all sub-range hoods 3 turning on the highest gear at the same time. The total fan output air volume value is determined by the air volume setting of sub-range hood 3, the air pressure difference between the public flue 2 and the flue of sub-range hood 3, and real-time control of the damper size. The total fan control system can balance the needs of all users. For example, when all users turn on the high gear, the control system will actively intervene in the damper of sub-range hood 3 according to the wind pressure monitoring of each node to balance the air volume needs of all users. All sub-range hoods 3 do not have fans, thus minimizing the user's range hood cost. Resources can finally be combined and utilized. Smoking can share the fan with floor ventilation. The ventilation function of sub-range hood 3 is enabled, and the user's home can achieve 24-hour ventilation.

[0026] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A range hood control system, characterized in that: include: A range hood main fan (1), the range hood main fan (1) is used to provide exhaust power for the entire building and the bottom of the range hood main fan (1) is connected to a public flue (2), a plurality of sub-range hoods (3) are provided on the surface of the public flue (2), and the plurality of sub-range hoods (3) are distributed at users on each floor, a wind pressure sensor (4) is provided in the public flue (2) and the sub-range hoods (3) for monitoring the wind pressure in the public flue, and an adjustable damper is provided in the sub-range hood (3); A total fan control system, the total fan control system being electrically connected to the wind pressure sensor (4), the sub-range hood (3), the adjustable damper and the range hood total fan (1) respectively. The total fan control system is based on the wind pressure of the common flue (2) and the wind volume level requirements set by the user of each sub-range hood (3), and calculates the pressure difference between the flue and the damper wind pressure through a specific algorithm, thereby controlling the damper size of the sub-range hood (3) and the exhaust volume of the motor of the range hood total fan (1).

2. A range hood control system according to claim 1, characterized in that: The total fan control system acquires and processes in real time the wind pressure of the common flue (2), the wind pressure of the dampers of all sub-range hoods (3), and the real-time gear air volume requirements of each sub-range hood (3), and based on these data, continuously adjusts the exhaust volume of the total range hood fan (1) and the damper size of each sub-range hood (3) to balance the exhaust volume requirements of all users.

3. A range hood control system according to claim 2, characterized in that: The specific algorithm specifically includes monitoring the wind pressure of the common flue (2), monitoring the wind pressure of the dampers of all sub-range hoods (3), collecting the real-time gear air volume requirements of all sub-range hoods (3) and transmitting them to the main fan control system for calculation, the main fan control system reading the user wind volume gear setting of the sub-range hood (3), calculating the pressure difference between the flue and the damper wind pressure, controlling the adjustable damper size of the sub-range hood (3) and the motor exhaust volume value of the range hood main fan (1), and balancing the exhaust volume requirements of all users through the algorithm.

4. The range hood control system according to claim 1, characterized in that: The output air volume value of the range hood master fan (1) is determined by the air volume setting of the sub-range hood (3), the air pressure difference between the common flue (2) and the flue of the sub-range hood (3), and the size of the adjustable damper controlled in real time.

5. The range hood control system according to claim 1, characterized in that: The main fan (1) of the range hood controls the size of the adjustable air door according to the wind pressure value in the sub-range hood (3) and the switch gear height setting of the sub-range hood (3).

6. A range hood control system according to claim 1, characterized in that: The sub-range hood (3) is equipped with an air monitoring module, which detects air quality. The main fan control system is electrically connected to the air monitoring module, and controls the sub-range hood (3) to open an adjustable damper for automatic ventilation according to the detection result of the air monitoring module.

7. The range hood control system according to claim 1, characterized in that: The adjustable damper comprises an air duct (6) and an adjusting motor (7); a ventilation duct (5) is connected to the surface of the sub-range hood (3); one end of the ventilation duct (5) is connected to the air duct (6) and the other end of the air duct (6) is connected to the public flue (2).

8. The range hood control system according to claim 7, characterized in that: The regulating motor (7) is arranged on the surface of the air duct (6), and the output shaft of the regulating motor (7) rotates to penetrate the air duct (6) and is connected to the regulating valve (8), and the regulating valve (8) is rotatably connected inside the air duct (6).

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