An intelligent variable frequency range hood based on oil fume concentration self-adaptation

Abstract

This utility model discloses an intelligent variable frequency range hood based on adaptive oil fume concentration, including a main body (range hood body), a main control system mounted on the range hood, and an air duct and air intake device mounted at its air inlet. The main body has an exhaust port corresponding to the air outlet of the air intake device, and the top of the main body has an exhaust duct corresponding to the exhaust port. This utility model utilizes a transmission unit consisting of a main shaft, an exhaust fan, and a follower fan located near the exhaust port inside the exhaust duct. The accelerated smoke from the exhaust device concentrates and impacts the exhaust fan at high speed, directly driving the main shaft to rotate at high speed. This, in turn, drives the follower fan located at the main control system end to rotate synchronously, generating a strong airflow to cool the main control system. This design fully utilizes the concentrated and high-velocity airflow characteristics within the exhaust duct, significantly improving transmission efficiency, resulting in a simple and reliable structure and significantly enhanced heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, specifically to an intelligent variable frequency range hood based on adaptive oil fume concentration. Background Technology

[0002] The main function of a range hood is to remove cooking fumes and steam from the kitchen. Most existing range hoods are equipped with a fixed fan speed or simple power level control to regulate suction power. The static pressure inside the range hood refers to the pressure value at which the exhaust volume reaches 7m³ / min. A higher static pressure value indicates stronger resistance to backdraft and better smoke extraction. If the exhaust pipe is long, far from a shared ventilation duct, or located on a higher floor, even higher static pressure is required to ensure proper smoke extraction and prevent backflow. Intelligent variable frequency control for range hoods is typically installed inside the unit and can automatically switch power levels to effectively extract cooking fumes.

[0003] A search revealed a patent publication number "CN 214700867 U" for an intelligent variable frequency drive control system for a range hood. The system includes a hollow fume extraction device housing a variable frequency drive control device. In this invention, the variable frequency drive control device is electrically connected to the operating area of ​​the fume extraction device. When the device is activated, the suction duct draws in kitchen fumes through the smoke inlet via an external suction device. As the fumes are drawn into the fume extraction device and impact the drive block, the drive rod and the connecting gear on the rotating shaft are connected. The drive rod then drives the rotating shaft to rotate via the connecting gear, causing the fan blades on the rotating shaft to rotate inside the variable frequency drive control device. This rotation dissipates heat from the internal circuit board of the variable frequency drive control device, thereby improving its internal heat dissipation.

[0004] The aforementioned intelligent variable frequency drive control system for range hoods uses a drive block installed at the smoke inlet of the fume extraction device. When fumes are sucked into the fume extraction device and impact the drive block, the drive rod and the rotating shaft rotate together via a connecting gear. This causes the fan blades on the rotating shaft to rotate inside the variable frequency drive control device, dissipating heat from the internal circuit board. However, in actual operation, the connecting gear may accumulate grease after prolonged use, making transmission difficult. Additionally, the system is located near the front of the smoke inlet, where the airflow velocity is relatively dispersed, resulting in some loss of the force used to control the shaft's rotation, which is difficult to fully utilize and thus affects the final heat dissipation effect.

[0005] Therefore, a smart variable frequency range hood based on adaptive oil fume concentration is proposed. Utility Model Content

[0006] The purpose of this invention is to provide an intelligent variable frequency range hood based on adaptive oil fume concentration to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an intelligent variable frequency range hood based on adaptive oil fume concentration, comprising a main body, a main control system, an air hood, and an air duct. The main body has an exhaust port corresponding to the air outlet of the air duct. The top of the main body has an exhaust duct corresponding to the exhaust port. A transmission part is rotatably arranged inside the exhaust duct near the exhaust port. An exhaust fan is connected to the transmission part. One end of the transmission part passes through the exhaust duct and extends into the main control system. The other end of the transmission part is connected to a follower fan. When the high-speed flowing gas discharged into the exhaust duct impacts the exhaust fan, the exhaust fan is controlled to drive the follower fan to rotate together. The outer wall of the main body has inclined heat dissipation holes on the side near the follower fan.

[0008] Preferably, the transmission unit is the main shaft, both of the exhaust fans are connected to the main shaft, and the follower fan is connected to the end of the main shaft near the main control system.

[0009] Preferably, the main control system includes a main control unit and a prediction unit, wherein the main control unit controls the normal operation of the equipment;

[0010] The prediction unit includes sensors respectively installed on the outer wall of the main body of the device and inside the flue, which are used to detect the concentration of flue gas in the external environment and the flue gas flow rate inside the flue. The main control unit, the prediction unit and the induced draft device are electrically connected. At the same time, the prediction unit adjusts the output power of the induced draft device in real time according to the sensors installed inside and outside.

[0011] Preferably, the air outlet of the air-inducing device is provided with a matching air guide hood, and the other end of the air guide hood is fixedly connected to the inside of the smoke exhaust port, so that an independent channel is formed between the output end of the air-inducing device and the input end of the smoke exhaust port.

[0012] Preferably, an air-guiding plate is installed on the inner wall of the flue near the exhaust fan, so that the conveying channel inside the flue gradually widens from the inside to the outside, thereby increasing the rotation speed of the exhaust fan at the narrow point.

[0013] Preferably, a trapezoidal groove is provided on the outer side wall of the main body of the device near the lower part of the air duct, and a supplementary light is provided inside the trapezoidal groove.

[0014] Preferably, the outer wall of the exhaust duct is provided with a matching protective cover, and the bottom of the protective cover is fixedly installed on the top of the main body of the device.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention innovatively places the heat dissipation power source inside the exhaust duct and adopts an integrated transmission structure with direct main shaft connection. This effectively solves the problems of insufficient driving force caused by oil contamination and airflow dispersion at the smoke inlet in traditional devices. Specifically, a transmission unit consisting of a main shaft, an exhaust fan, and a follower fan is set inside the exhaust duct near the exhaust outlet. The flue gas, accelerated by the exhaust fan, concentrates and impacts the exhaust fan at high speed, directly driving the main shaft to rotate at high speed. This, in turn, drives the follower fan located at the main control system to rotate synchronously, generating a strong airflow to dissipate heat from the main control system. This design fully utilizes the characteristics of concentrated and high-velocity airflow in the exhaust duct, significantly improving transmission efficiency. It also avoids setting up complex gear mechanisms at the oil-contaminated air inlet, resulting in a simple and reliable structure with significantly enhanced heat dissipation.

[0017] This invention achieves a synergistic improvement in the operating efficiency and heat dissipation performance of a range hood by constructing an intelligent prediction unit with dual internal and external sensors and optimizing the flow channel design. The prediction unit monitors the concentration of oil fumes in the external environment and the actual flow rate in the internal flue in real time through sensors respectively set on the outer wall of the main body of the device and inside the exhaust duct. The main control system can intelligently learn and accurately adjust the output power of the exhaust fan based on this data, achieving true "on-demand exhaust" and achieving energy saving and noise reduction while ensuring the exhaust effect.

[0018] In addition, the exhaust fan installed in the flue creates a Venturi effect where the flow channel widens from narrow to wide, further accelerating the speed of the exhaust fan at the narrow opening and enhancing the heat dissipation airflow; while the air guide hood at the air outlet ensures that the flue gas jet can act on the exhaust fan in a concentrated and efficient manner, thus guaranteeing the efficient operation of the entire system from the flow channel design. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the main cross-sectional structure of the present utility model;

[0021] Figure 3 This is a schematic diagram of the control system structure of this utility model.

[0022] Explanation of reference numerals in the attached diagram: 1. Main body of the device; 2. Main control system; 3. Exhaust hood; 4. Exhaust device; 5. Exhaust duct; 6. Exhaust port; 7. Main shaft; 8. Exhaust fan; 9. Follow-up fan; 10. Heat dissipation hole; 11. Exhaust plate; 12. Air guide hood; 13. Protective cover; 14. Trapezoidal groove; 15. Supplemental light; 16. Sensor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Please refer to Figures 1-3 This utility model provides a technical solution: an intelligent variable frequency range hood based on adaptive oil fume concentration, including a main body 1, i.e., the main body of the range hood, a main control system 2 installed on the range hood, and an air duct 3 and an air ducting device 4 installed at its air inlet. The main body 1 has an exhaust port 6 corresponding to the air outlet of the air ducting device 4 inside, and an exhaust duct 5 corresponding to the exhaust port 6 on the top of the main body 1. The extracted fumes are transported to the exhaust duct 5 through the exhaust port 6 and discharged. Simultaneously, a transmission part is rotatably installed inside the exhaust duct 5 near the exhaust port 6, and an exhaust fan 8 is connected to the transmission part. One end of the transmission part passes through the exhaust duct 5 and extends to the main control system. Inside the system 2, the other end of the transmission unit is connected to a follower fan 9. When the high-speed flowing gas discharged into the exhaust duct 5 impacts the induced draft fan 8, the induced draft fan 8 is controlled to drive the follower fan 9 to rotate together, thereby achieving heat dissipation for the components in the main control system 1. The outer wall of the main body 1 is provided with an inclined heat dissipation hole 10 on the side near the follower fan 9. The generated hot air is discharged through the heat dissipation hole. At the same time, the structure is simpler than the existing technology. Secondly, it is set in the exhaust duct 5, where the amount of flue gas is more concentrated and the flow rate is faster, making the fan blades rotate faster, but with better heat dissipation effect. The transmission unit is the main shaft 7, and both induced draft fans 8 are connected to the main shaft 7. The follower fan 9 is connected to the end of the main shaft 7 near the main control system 2.

[0025] In this embodiment, it should be noted that the main control system 2 includes a main control unit and a prediction unit. The main control unit controls the normal operation of the equipment, including controlling the power delivery of the induced draft device 4 and other settings.

[0026] Meanwhile, the prediction unit includes sensors 16 respectively installed on the outer wall of the main body 1 and inside the exhaust duct 5. These sensors are used to detect the concentration of smoke in the external environment of the range hood and the airflow velocity inside the exhaust duct 5, thereby helping the prediction unit to perform intelligent learning. For example, when the gas flow velocity inside the exhaust duct 5 is always at value A and the external smoke concentration is always at value B, but the concentration of value B has not decreased, it indicates that the airflow velocity of value A inside the exhaust duct needs to be increased. This sends a signal to the main control system to control the induced draft device 4 to increase its power. The main control unit, the prediction unit, and the induced draft device 4 are electrically connected. At the same time, the prediction unit adjusts the output power of the induced draft device 4 in real time according to the sensors 16 installed inside and outside the unit.

[0027] In this embodiment, a matching air guide hood 12 is provided at the air outlet of the air induced draft device 4. The other end of the air guide hood 12 is fixedly connected to the inside of the smoke exhaust port 6, so that an independent channel is formed between the output end of the air induced draft device 4 and the input end of the smoke exhaust port 6, so that the exhaust gas is discharged more concentratedly from the smoke exhaust port 6 into the smoke exhaust port 5.

[0028] Next, by installing an air-guiding plate 11 on the inner wall of the flue 5 near the exhaust fan 8, the conveying channel inside the flue 5 becomes wider from the inside to the outside, which speeds up the rotation speed of the exhaust fan 8 at the narrow part, making the fan better at dissipating heat from the main control system 2.

[0029] In this embodiment, a trapezoidal groove 14 is provided on the lower part of the outer wall of the main body 1 near the air duct 3, and a supplementary light 15 is provided inside the trapezoidal groove 14 for easy observation.

[0030] In this embodiment, the outer wall of the flue 5 is provided with a matching protective cover 13. The bottom of the protective cover 13 is fixedly installed on the top of the main body 1 of the device to prevent gas leakage at the flue and also to achieve an aesthetic effect.

[0031] The specific operating principle of the intelligent variable frequency range hood based on adaptive oil fume concentration described in this utility model is as follows: After the equipment is started, the exhaust fan 4 starts to work, guiding the sucked oil fumes through the air guide hood 12 of its air outlet, concentrating and transporting them to the exhaust port 6, and entering the exhaust duct 5. The exhaust fan plate 11 on the inner wall of the exhaust duct 5 makes the flow channel form a structure that changes from narrow to wide, accelerating the flow of smoke. The high-speed smoke flow impacts the exhaust fan 8 installed on the main shaft 7, driving it to rotate. One end of the main shaft 7 extends into the main control system 2 and is connected to the follower fan 9. The rotation of the exhaust fan 8 directly drives the follower fan 9 to rotate at high speed through the main shaft 7. The generated airflow forces heat dissipation on the internal components of the main control system 2, and the hot air is discharged through the inclined heat dissipation holes 10 on the outside of the main body 1 of the device.

[0032] Meanwhile, sensors 16 installed on the outer wall of the main body 1 and inside the exhaust duct 5 continue to work, detecting the concentration of oil fumes in the external environment and the airflow velocity inside the exhaust duct 5 in real time. These data are transmitted to the prediction unit in the main control system 2. The prediction unit analyzes and learns based on the data from the internal and external sensors, intelligently determines the required exhaust intensity, and outputs a control signal to the main control unit. The main control unit then dynamically adjusts the output power of the induced draft device 4 to achieve intelligent variable frequency operation of the range hood, achieving energy saving and noise reduction while ensuring the best smoke extraction effect.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart variable frequency range hood based on adaptive oil fume concentration, comprising a main body (1), a main control system (2), an air hood (3), and an air extraction device (4), characterized in that: The device body (1) has a smoke exhaust port (6) inside that corresponds to the air outlet of the induced draft device (4). The top of the device body (1) has a smoke exhaust duct (5) corresponding to the smoke exhaust port (6). The smoke exhaust duct (5) has a rotatable transmission part inside near the smoke exhaust port (6). The transmission part is connected to an induced draft fan (8). One end of the transmission part passes through the smoke exhaust duct (5) and extends into the main control system (2). The other end of the transmission part is connected to a follower fan (9). When the high-speed flowing gas discharged into the smoke exhaust duct (5) hits the induced draft fan (8), the induced draft fan (8) is controlled to drive the follower fan (9) to rotate together. The outer wall of the device body (1) near the follower fan (9) has an inclined heat dissipation hole (10).

2. The intelligent variable frequency range hood based on oil fume concentration self-adaptation according to claim 1, characterized in that: The transmission unit is the main shaft (7), and the two exhaust fans (8) are connected to the main shaft (7). The follower fan (9) is connected to the end of the main shaft (7) near the main control system (2).

3. The intelligent variable frequency range hood based on adaptive oil fume concentration according to claim 1, characterized in that: The main control system (2) includes a main control unit and a prediction unit, and the main control unit controls the normal operation of the equipment; The prediction unit includes sensors (16) respectively installed on the outer wall of the main body (1) and inside the flue (5), which are used to detect the concentration of flue gas in the external environment and the flue gas flow rate inside the flue (5). The main control unit, the prediction unit and the induced draft device (4) are electrically connected. At the same time, the prediction unit adjusts the output power of the induced draft device (4) in real time according to the sensors (16) installed inside and outside.

4. The intelligent variable frequency range hood based on oil fume concentration self-adaptation according to claim 1, characterized in that: The air outlet of the air-drawing device (4) is provided with a matching air guide hood (12), and the other end of the air guide hood (12) is fixedly connected to the inside of the smoke exhaust port (6), so that an independent channel is formed between the output end of the air-drawing device (4) and the input end of the smoke exhaust port (6).

5. The intelligent variable frequency range hood based on adaptive oil fume concentration according to claim 1, characterized in that: An air-guiding plate (11) is installed on the inner wall of the flue (5) near the exhaust fan (8), so that the conveying channel inside the flue (5) becomes wider from the inside to the outside, thereby speeding up the rotation speed of the exhaust fan (8) at the narrow part.

6. The intelligent variable frequency range hood based on adaptive oil fume concentration according to claim 1, characterized in that: The outer wall of the main body (1) of the device is provided with a trapezoidal groove (14) near the bottom of the air hood (3), and a supplementary light (15) is provided inside the trapezoidal groove (14).

7. The intelligent variable frequency range hood based on oil fume concentration self-adaptation according to claim 5, characterized in that: The outer wall of the exhaust duct (5) is provided with a matching protective cover (13), and the bottom of the protective cover (13) is fixedly installed on the top of the device body (1).

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