Novel range hood

Abstract

The invention belongs to the technical field of range hoods, and discloses a novel range hood, which comprises a conical fan pipe, an exhaust fume collecting hood and an oil collecting cavity, and the conical fan pipe comprises a coanda effect, a venturi tube effect and a Bernoulli principle. According to the range hood, airflow separation loss is reduced through the coanda effect, the conical pipe is combined with the double diagonal flow fans, airflow speed and pressure distribution are optimized through the Venturi pipe effect, working points of the serial diagonal flow fans are accurately matched, and compared with a traditional range hood, the range hood has the advantage that the oil smoke adsorption and conveying efficiency is remarkably improved. Oil molecules are efficiently separated through rotational flow of the oil collecting cavity by means of centrifugal force, centralized collection of oil stains is achieved by matching with the design of the oil discharging pipe, and oil-smoke separation efficiency is improved. The connecting assembly achieves stable assembly of the functional modules, the integrity of the system is ensured, convenience is provided for disassembly and cleaning of the diagonal flow fan, the conical pipe and other components, practicability and maintenance convenience are both considered, and actual application and operation are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of range hoods, and in particular to a novel range hood. Background Art

[0002] A range hood, also known as a range hood, is a kitchen appliance that purifies the kitchen environment. It is installed above the kitchen stove and can quickly remove the waste from stove combustion and the oil smoke that is harmful to the human body produced during cooking and discharge it outdoors. At the same time, it condenses and collects the oil smoke, reduces pollution, purifies the air, and has a safety guarantee function of anti-toxicity and explosion-proof.

[0003] However, in the actual application of existing equipment, the airflow design of the range hood is single, and physical mechanisms such as the Coanda effect and the Bernoulli principle are not fully utilized, which can easily cause airflow separation, resulting in large energy loss and difficulty in improving the efficiency of oil fume adsorption. At the same time, the oil separation technology is limited, and it is impossible to efficiently separate oil molecules, which affects the subsequent oil collection. Most internal components of products lack oleophobic treatment, and oil easily adheres to the surfaces of components such as conical fan tubes and oblique flow fans, which are difficult to clean after accumulation. In addition, the structural design is rigid, the degree of modularization is low, the components are complex to disassemble, and the maintenance convenience is poor. Existing range hoods lack the coordinated application of physical principles, lack systematic optimization of links such as oil fume gathering, airflow acceleration, and pressure regulation, and it is difficult to achieve a comprehensive improvement in core indicators such as suction, energy efficiency, and oil treatment, which is not conducive to actual application and operation. Summary of the invention

[0004] One of the objects of the present invention is to provide a novel range hood.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a new type of range hood, including a conical fan pipe, a smoke collecting hood and an oil collecting chamber: the conical fan pipe includes Coanda effect, Venturi tube effect and Bernoulli principle;

[0006] The conical fan tube is fixedly connected to the inside of the conical fan tube, two second connecting frames are installed and connected to the inside of the conical fan tube, the bottom of each of the second connecting frames is installed and connected to the oblique flow fan, the top of each of the second connecting frames is installed and connected to the tail cone, the inside of the oil collecting chamber is fixedly connected to the first connecting frame, the top of the first connecting frame is rotatably installed with a spiral shaft, the outer side of the conical fan tube is provided with a smoke pipe, a gap is provided between the smoke pipe and the conical fan tube, and a circular damper made of an ultrasonic transducer is provided at the connection between the smoke pipe and the smoke collecting chamber;

[0007] A connecting assembly is disposed on the outer side of the conical fan tube, and the connecting assembly includes a first connecting tube, a first connecting rod, a second connecting tube, a second connecting rod and a first connecting frame.

[0008] Preferably, the top and bottom of the conical fan tube are rotatably connected to a disassembly tube, the top of the smoke hood is equidistantly fixedly connected to a first connecting rod, the tops of multiple first connecting rods are fixedly connected to a first connecting tube, the first connecting tube is threadedly connected to one of the disassembly tubes, the top of the disassembly tube at the top of the conical fan tube is threadedly connected to a second connecting tube, the top of the second connecting tube is equidistantly fixedly connected to a second connecting rod, and the tops of the second connecting rods are fixedly connected to the oil collecting chamber.

[0009] Preferably, a straight circular tube is fixedly connected to the top of the oil collecting chamber, wherein one of the diagonal flow fans is located at the large end of the tapered tube, and the other diagonal flow fan is located at the small end of the tapered tube.

[0010] Preferably, the conical fan duct, smoke hood, oil collecting chamber and internal component surfaces are all treated with nano-oil repellent. A ceramic acoustic wave vibration plate and a smoke sensor are installed in the smoke collecting chamber of the smoke hood. The ceramic acoustic wave vibration plate is used to vibrate and assist in gathering the smoke, and the smoke sensor is used to detect the concentration of the smoke.

[0011] Preferably, the oil collecting chamber is driven to rotate near the spiral axis by the output airflow of the conical fan tube.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) The present invention reduces airflow separation loss through the Coanda effect. The conical tube combined with the dual oblique flow fan optimizes the airflow velocity and pressure distribution through the Venturi tube effect, accurately matches the working point of the series oblique flow fan, and significantly enhances the oil fume adsorption and transportation efficiency compared to traditional range hoods. The swirl in the oil collection chamber efficiently separates oil molecules by centrifugal force. Combined with the oil drain pipe design, the oil pollution is collected in a centralized manner, thereby improving the oil fume separation efficiency. The connection components realize the stable assembly of functional modules, which not only ensures the integrity of the system, but also facilitates the disassembly and cleaning of components such as the oblique flow fan and the conical tube, taking into account practicality and maintenance convenience. Integrating the Coanda effect, Bernoulli principle, Venturi tube effect and tornado model, multi-layer physical principles run through the entire process of oil fume gathering, airflow acceleration, pressure regulation, and oil pollution separation, which greatly improves the core indicators of the range hood such as suction, energy efficiency, and oil pollution treatment.

[0014] (2) The present invention uses threaded connection and connecting rod design to make the various components of the range hood flexibly disassembled, which is convenient for cleaning internal components (such as diagonal flow fans and tapered tubes) or replacing damaged parts, thereby improving maintenance convenience; at the same time, the connection sealing is ensured to avoid oil fume leakage, and the straight-through round tube simplifies the smoke outlet path and reduces airflow resistance; the dual diagonal flow fans are combined with the tapered tube layout to achieve step-by-step acceleration of the airflow through the Venturi tube effect, thereby improving the exhaust efficiency and enhancing the ability to adsorb oil fume.

[0015] (3) The present invention reduces the cleaning frequency and maintenance workload through nano-oil repellent treatment; the ceramic acoustic wave vibration plate enhances the effect of gathering oil smoke and improves the smoke collection efficiency; the smoke sensor realizes intelligent control, dynamically adjusts the equipment operation status according to the oil smoke concentration, optimizes energy consumption and ventilation effect, and the swirl uses centrifugal force to separate oil molecules and improve the oil smoke separation efficiency; the tornado effect provides additional power for the air outlet and reduces the energy consumption of the oblique flow fan; the swirl can also assist in transporting oil pollution to the oil drain pipe at the bottom of the oil collection chamber, which is convenient for centralized collection and treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the top cross-sectional structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure when viewed from above of the present invention.

[0020] In the figure: 1. conical fan tube; 2. conical tube; 3. oblique flow fan; 4. first connecting tube; 5. first connecting rod; 6. smoke hood; 7. second connecting tube; 8. disassembly tube; 9. second connecting rod; 10. oil collecting chamber; 11. first connecting frame; 12. spiral shaft; 13. straight round tube; 14. second connecting frame; 15. tail vertebrae. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0022] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0024] One of the preferred embodiments of the present invention is as follows Figures 1 to 4 As shown, a novel range hood comprises a conical fan tube 1, a fume collecting hood 6 and an oil collecting chamber 10: the conical fan tube 1 includes the Coanda effect, the Venturi tube effect and the Bernoulli principle;

[0025] The conical fan tube 1 is fixedly connected to the conical tube 2, and two second connecting frames 14 are installed and connected to the conical tube 2. The bottom of the second connecting frames 14 is installed and connected to the oblique flow fan 3, and the top of the second connecting frames 14 is installed and connected to the tail vertebra 15. The oil collecting chamber 10 is fixedly connected to the first connecting frame 11, and the top of the first connecting frame 11 is rotatably installed with a spiral shaft 12. The outer side of the conical fan tube 1 is provided with a smoke pipe, and there is a gap between the smoke pipe and the conical fan tube 1. A circular damper made of an ultrasonic transducer is provided at the connection between the smoke pipe and the smoke collecting chamber 10;

[0026] A connecting assembly is provided on the outer side of the conical fan tube 1 , and the connecting assembly includes a first connecting tube 4 , a first connecting rod 5 , a second connecting tube 7 , a second connecting rod 9 and a first connecting frame 11 .

[0027] The top and bottom of the conical fan tube 1 are rotatably connected to the disassembly tube 8, the top of the smoke hood 6 is equidistantly fixedly connected to the first connecting rod 5, the tops of multiple first connecting rods 5 are fixedly connected to the first connecting tube 4, the first connecting tube 4 is threadedly connected to one of the disassembly tubes 8, the top of the disassembly tube 8 at the top of the conical fan tube 1 is threadedly connected to the second connecting tube 7, the top of the second connecting tube 7 is equidistantly fixedly connected to the second connecting rod 9, and the tops of the second connecting rods 9 are fixedly connected to the oil collecting chamber 10.

[0028] A straight-through circular tube 13 is fixedly connected to the top of the oil collecting chamber 10 , wherein one oblique flow fan 3 is located at the large end of the tapered tube 2 , and the other oblique flow fan 3 is located at the small end of the tapered tube 2 .

[0029] The conical fan tube 1, the smoke hood 6, the oil collecting chamber 10 and the surfaces of the internal components are all treated with nano-oil repellent. A ceramic acoustic wave vibration piece and a smoke sensor are installed in the smoke collecting chamber of the smoke hood 6. The ceramic acoustic wave vibration piece is used to vibrate and assist in gathering the oil smoke, and the smoke sensor is used to detect the oil smoke concentration.

[0030] The oil collecting chamber 10 near the spiral shaft 12 is driven to rotate by the airflow output from the conical fan tube 1 .

[0031] Working principle:

[0032] When in use, the conical tube 2 inside the conical fan tube 1 constructs a Venturi tube structure, which has two coaxial oblique flow fans 3, one large and one small. The large oblique flow fan is located at the large end of the conical tube. When in operation, it supplies air to the small oblique flow fan at the small end, triggering the Venturi tube effect with the help of the diameter difference at both ends of the conical tube, so that the airflow at the small end outlet is accelerated. At the same time, when the high-speed airflow is ejected through the gap between the conical tube and the outer layer of the external straight-through circular tube conical fan tube, the airflow in the gap is accelerated based on the Coanda effect, effectively reducing the separation of airflow. The smoke hood 6 serves as the air inlet, and the lower half uses the traditional design. The upper half of the smoke collection chamber to the smoke outlet is a 45-degree arc-shaped smooth surface. If an upgraded version of the ceramic sonic vibration plate is configured, the oil smoke can be gathered by vibration to complete the initial diversion. After the airflow enters the oil collection chamber 10, because the volume of the cavity is larger than the oblique flow fan tube, the flow rate decreases in accordance with the Bernoulli principle: the flow rate is negatively correlated with the pressure. At this time, the spiral shaft 12 near the entrance of the oil collecting chamber is driven to rotate by the airflow of the conical fan tube, causing the airflow in the chamber to form a vortex, using centrifugal force to separate oil molecules, and the vortex simulates the power of a tornado to assist the air discharge process. The first connecting tube 4, the first connecting rod 5, the second connecting tube 7, the second connecting rod 9 and other connecting components tightly connect the smoke hood, the conical fan tube and the oil collecting chamber to ensure the sealing of the airflow channel and the stability of the structure. The tail vertebra 15 can play a rectifying effect during the flow of air, and at the same time can have a certain anti-oil effect on the diagonal flow fan 3;

[0033] The disassembly tubes 8 at the top and bottom of the conical fan tube 1 are respectively assembled with the first connecting tube 4 and the second connecting tube 7 through threads. The first connecting rod 5 and the second connecting rod 9 realize the mechanical connection of the smoke hood 6, the conical fan tube 1, and the oil collecting chamber 10 to form a detachable modular structure. The straight-through round tube 13 at the top of the oil collecting chamber 10 serves as the final smoke outlet channel; the large oblique flow fan in the conical tube 2 is located at the large end, and the small oblique flow fan is located at the small end. The large oblique flow fan supplies air to the small oblique flow fan. The taper difference of the conical tube is used to accelerate the airflow at the small end to enhance the air extraction power. The nano-oil-repellent treatment forms a low-oil adhesion layer on the surface of the equipment to reduce the adhesion of oil stains; the ceramic acoustic wave vibration sheet in the smoke hood 6 assists in gathering the smoke through vibration, and the smoke sensor detects the smoke concentration in real time to provide data basis for the speed adjustment of the oblique flow fan. After the high-speed airflow output by the oblique flow fan tube enters the oil collecting chamber 10, the airflow decelerates due to the increase in the volume of the oil collecting chamber. At the same time, the airflow drives the spiral shaft 12 to rotate, so that the airflow forms a vortex in the oil collecting chamber.

[0034] The above describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A new type of range hood, characterized in that: It comprises a conical fan tube (1), a smoke collecting hood (6) and an oil collecting chamber (10): the conical fan tube (1) includes the Coanda effect, the Venturi tube effect and the Bernoulli principle; The conical fan tube (1) is fixedly connected to a conical tube (2) inside, and two second connecting frames (14) are installed and connected inside the conical tube (2), and the bottom of each of the second connecting frames (14) is installed and connected to an oblique flow fan (3), and the top of each of the second connecting frames (14) is installed and connected to a tail cone (15), and the inside of the oil collecting chamber (10) is fixedly connected to a first connecting frame (11), and a spiral shaft (12) is rotatably installed on the top of the first connecting frame (11), and a smoke pipe is provided on the outside of the conical fan tube (1), and a gap is provided between the smoke pipe and the conical fan tube (1), and a circular damper made of an ultrasonic transducer is provided at the connection between the smoke pipe and the smoke collecting chamber (10); A connecting assembly is provided on the outer side of the conical fan tube (1), and the connecting assembly comprises a first connecting tube (4), a first connecting rod (5), a second connecting tube (7), a second connecting rod (9) and a first connecting frame (11).

2. A novel range hood as claimed in claim 1, characterized in that: The top and bottom of the conical fan tube (1) are both rotatably connected to a disassembly tube (8); the top of the smoke hood (6) is equidistantly fixedly connected to a first connecting rod (5); the tops of a plurality of the first connecting rods (5) are fixedly connected to a first connecting tube (4); the first connecting tube (4) is threadedly connected to one of the disassembly tubes (8); the top of the disassembly tube (8) at the top of the conical fan tube (1) is threadedly connected to a second connecting tube (7); the top of the second connecting tube (7) is equidistantly fixedly connected to a second connecting rod (9); the tops of the second connecting rods (9) are fixedly connected to an oil collecting chamber (10).

3. A novel range hood as claimed in claim 1, characterized in that: A straight-through circular tube (13) is fixedly connected to the top of the oil collecting chamber (10), wherein one of the diagonal flow fans (3) is located at the large end of the conical tube (2), and the other diagonal flow fan (3) is located at the small end of the conical tube (2).

4. A novel range hood as claimed in claim 1, characterized in that: The conical fan pipe (1), the smoke collecting hood (6), the oil collecting chamber (10) and the surfaces of the internal components are all subjected to nano-oil repellent treatment. A ceramic acoustic wave vibration sheet and a smoke sensor are installed in the smoke collecting chamber of the smoke collecting hood (6). The ceramic acoustic wave vibration sheet is used for vibration-assisted gathering of oil smoke, and the smoke sensor is used for detecting the concentration of oil smoke.

5. A novel range hood as claimed in claim 1, characterized in that: The oil collecting chamber (10) is driven to rotate near the spiral shaft (12) by the airflow output from the conical fan pipe (1).

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