A noise reduction and oil fume suction and exhaust system and an integrated stove

Abstract

The present invention relates to the technical field of kitchen appliances, and specifically discloses a noise-reducing fume suction and exhaust system and an integrated stove. The system includes a frame shell forming a frame cavity, a bottom plate oil drain hole is provided at the bottom of the frame shell, a smoke exhaust box assembly with a smoke exhaust channel and a gas collecting box assembly with a gas collecting chamber are formed in the frame cavity; the smoke exhaust channel is connected to the external environment; the gas collecting chamber is located above the smoke exhaust channel, and a duct assembly for blowing air into the smoke exhaust channel is provided in the gas collecting chamber; the bottom of the gas collecting chamber is connected to the top of the smoke exhaust channel through an oil dripping passage, and the smoke exhaust channel is provided with a return air baffle for blocking the wind flowing through the smoke exhaust channel from entering the oil dripping passage; a bottom oil drain hole connecting the smoke exhaust channel and the frame cavity is provided at the bottom of the smoke exhaust box assembly, and a wind baffle for blocking the wind flowing through the smoke exhaust channel from passing through the bottom oil drain hole is provided in the smoke exhaust channel. The system reduces noise generation and improves the user experience by planning the trajectory of the wind in the smoke exhaust channel.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a noise-reducing fume suction and exhaust system and an integrated stove. Background Art

[0002] Integrated stoves are a new type of kitchen appliance that combines a range hood, gas stove, steamer, and oven. The exhaust system is the core of the integrated stove, responsible for extracting and discharging kitchen fumes. Fumes are drawn into the air collecting box through the smoke inlet and then exhausted outdoors through the fan and smoke duct, thus purifying the air in the kitchen.

[0003] Currently, integrated stoves typically increase air volume to improve smoke extraction, but this increases the noise level of the exhaust system. Excessive noise can cause users to experience adverse reactions such as headaches, irritability, and palpitations, resulting in a poor user experience. Long-term exposure to noise can pose health risks. Therefore, various noise reduction technologies are widely used in integrated stoves.

[0004] Existing noise reduction measures for integrated stoves primarily focus on optimizing the fan, the source of noise, and using passive sound-absorbing materials. These methods are effective for mid- and high-frequency noise, but are less effective for low-frequency noise, which makes up a large portion of the noise spectrum. Consequently, existing integrated stoves suffer from the technical problem of high noise levels. Summary of the Invention

[0005] The purpose of the present invention is to provide a noise-reducing oil fume suction and exhaust system and an integrated stove, which can reduce the troubles caused by noise while ensuring smooth oil leakage and the air volume and air pressure of the oil fume suction and exhaust system.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The grill is located at the bottom of the grill and has a bottom grille, wherein the grill is located at the top of the grille, and the bottom grille has a vertical vent that opens and closes the grille, thereby cooling the grille and discharging fans.

[0008] As a preferred technical solution for the noise reduction fume suction and exhaust system, one end of the wind shield is fixedly connected to the side wall of the exhaust channel, and the wind shield gradually tilts downward from the connection end to the free end.

[0009] As a preferred technical solution for the noise reduction fume suction and exhaust system, one end of the return air baffle is fixed to the side wall of the exhaust channel, and the return air baffle gradually tilts downward from the connection end to the free end.

[0010] As an optimal technical solution for the noise reduction oil fume suction and exhaust system, the return air baffle and the side wall of the smoke exhaust channel form a top wind shelter chamber, the oil dripping passage is connected to the top wind shelter chamber, the top wind shelter chamber is connected to the smoke exhaust channel through the top opening, the wind baffle and the side wall of the smoke exhaust channel form a bottom wind shelter chamber, the bottom oil discharge hole is connected to the smoke exhaust channel through the bottom wind shelter chamber, the bottom wind shelter chamber is connected to the smoke exhaust channel through the bottom opening, and the top opening and the bottom opening are staggered.

[0011] As an optimal technical solution for the noise reduction oil fume suction and exhaust system, the bottom oil drain hole and the bottom plate oil drain hole are staggered.

[0012] As a preferred technical solution for the noise reduction oil fume suction and exhaust system, the frame shell includes a frame bottom plate, the bottom plate oil drain hole passes through the frame bottom plate, and the frame bottom plate gradually slopes downward toward the bottom plate oil drain hole.

[0013] As an optimal technical solution for the noise reduction oil fume suction and exhaust system, an air collecting port is provided at the bottom of the air collecting box assembly, and a top oil drain hole is provided at the top of the exhaust channel. The air collecting port is connected to the top oil drain hole to form the oil dripping passage.

[0014] As an optimal technical solution for the noise reduction oil fume suction and exhaust system, the air duct assembly includes an air outlet pipe, the exhaust channel is provided with a connecting port, the air outlet pipe and the connecting port are sealed and connected by a sealing ring, and the air duct assembly blows air to the exhaust channel through the air outlet pipe.

[0015] As an optimal technical solution for the noise reduction oil fume suction and exhaust system, the air duct assembly also includes a centrifugal fan and a rectifier net fixed to the centrifugal fan. The rectifier net is hemispherical and evenly distributed with multiple hexagonal holes. The centrifugal fan is used to blow the oil fume passing through the hexagonal holes toward the exhaust channel.

[0016] An integrated stove comprises a handpiece and the above-mentioned noise-reducing oil fume suction and exhaust system, wherein the handpiece is used to collect oil fume and transport the oil fume into the gas collecting chamber.

[0017] Beneficial effects of the present invention:

[0018] This noise-reducing oil fume suction and exhaust system uses the design of an oil dripping passage, a bottom oil drain hole, and an air duct assembly to blow air into the exhaust passage, thereby completing the processing and discharge of oil fumes in the gas collecting chamber. A portion of the oil droplets in the gas collecting chamber adheres to the side wall of the gas collecting chamber and, under the influence of their own weight, passes through the oil dripping passage into the exhaust passage. The oil droplets in the exhaust passage, under the influence of their own weight, fall to the bottom of the exhaust passage and pass through the bottom oil drain hole into the frame cavity. The oil droplets in the frame cavity, under the influence of their own weight, eventually pass through the bottom plate oil drain hole, thereby achieving the processing and discharge of the oil droplets. By using the air duct assembly, the smoke in the gas collecting chamber and another portion of the oil droplets can be blown into the exhaust passage and discharged into the external environment through the exhaust passage, thereby achieving the processing and discharge of the smoke. When flowing through the smoke exhaust channel, the swept oil droplets can adhere to the side walls of the smoke exhaust channel, and then converge with the oil droplets at the bottom of the smoke exhaust channel under the influence of their own weight. The above design greatly reduces the probability of oil droplets being directly swept to the external environment, optimizes the emission capacity of this noise-reducing oil fume suction and exhaust system, and reduces pollution to the external ambient air. Through the design of the return air baffle and the wind baffle, the positive pressure wind in the smoke exhaust channel can be blocked from passing through the oil dripping passage and the bottom oil drain hole, thereby effectively ensuring that the wind in the smoke exhaust channel moves according to the predetermined trajectory. While avoiding the wind affecting the flow of oil droplets, it can also reduce the situation where the wind rushes around in the gas collecting cavity and the frame cavity to generate noise. The above structural improvements can achieve the purpose of noise reduction while ensuring smooth oil dripping and not affecting the air volume and pressure, thereby bringing a comfortable user experience and ensuring the physical and mental health of the users. The above improvements are simple and reliable, with low processing costs and high structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional view of a noise reduction integrated stove provided by an embodiment of the present invention;

[0020] Figure 2 This is a structural schematic diagram of a smoke exhaust box assembly provided by an embodiment of the present invention from a first perspective;

[0021] Figure 3 This is a structural schematic diagram of the smoke exhaust box assembly provided by an embodiment of the present invention from a second perspective;

[0022] Figure 4 This is a schematic structural diagram of a smoke exhaust box assembly provided by an embodiment of the present invention from a third perspective;

[0023] Figure 5 is a cross-sectional view of a smoke exhaust box assembly provided in an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the structure of the frame base plate provided by an embodiment of the present invention;

[0025] Figure 7It is a cross-sectional view of the air duct assembly provided by an embodiment of the present invention.

[0026] In the picture:

[0027] 100. Frame shell; 110. Frame bottom plate; 111. Bottom plate oil drain hole; 120. Frame side plate; 130. Frame storage cabinet; 200. Air collecting chamber; 201. Air collecting port; 300. Air duct assembly; 310. Fan air duct; 320. Fan blade; 330. Guide ring; 340. Rectifier network; 350. Impeller module; 360. Wind hood; 400. Smoke exhaust box assembly; 401. Return air baffle; 402. Wind baffle; 410. Smoke exhaust port; 420. Connecting port; 430. Top oil drain hole; 440. Bottom oil drain hole; 450. Top windshield; 460. Bottom windshield; 500. Sealing ring; 600. Oil collecting unit. DETAILED DESCRIPTION

[0028] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0032] This embodiment provides an integrated stove, comprising a stove head and a noise-reducing fume extraction and exhaust system. The stove head collects and delivers fume to a gas collecting chamber within the noise-reducing fume extraction and exhaust system. This integrated stove, with its structure, collects, processes, and exhausts fume, improving the kitchen environment and enhancing the user experience.

[0033] like Figures 1-6 As shown, this embodiment also provides a noise reduction oil smoke suction and exhaust system, including a frame shell 100, a frame cavity is formed in the frame shell 100, a bottom plate oil drain hole 111 is opened at the bottom of the frame shell 100, a smoke exhaust box assembly 400 and an air collecting box assembly are provided in the frame cavity; a smoke exhaust channel connected to the external environment is formed in the smoke exhaust box assembly 400; an air collecting chamber 200 is formed in the air collecting box assembly, the air collecting chamber 200 is located above the smoke exhaust channel, and an air duct assembly 300 is provided in the air collecting chamber 200, and the air duct assembly 300 is used to exhaust smoke. The channel is blown; the bottom of the air collecting chamber 200 is connected to the top of the smoke exhaust channel through an oil dripping passage, and the smoke exhaust channel is provided with a return air baffle 401 located below the oil dripping passage, and the return air baffle 401 is used to block the wind flowing through the smoke exhaust channel from entering the oil dripping passage; the bottom of the smoke exhaust box assembly 400 is provided with a bottom oil drain hole 440 connecting the smoke exhaust channel and the frame cavity, and the smoke exhaust channel is provided with a wind shield 402 located above the bottom oil drain hole 440, and the wind shield 402 is used to block the wind flowing through the smoke exhaust channel from passing through the bottom oil drain hole 440.

[0034] This noise reduction oil smoke suction and exhaust system uses the design of the oil dripping passage, the bottom oil drain hole 440 and the air duct assembly 300 to blow air into the exhaust passage, thereby completing the processing and discharge of the oil smoke in the gas collecting chamber 200. A portion of the oil droplets in the gas collecting chamber 200 adheres to the side wall of the gas collecting chamber 200 and passes through the oil dripping passage under the influence of its own weight into the exhaust passage. The oil droplets in the exhaust passage fall to the bottom of the exhaust passage under the influence of its own weight and pass through the bottom oil drain hole 440 into the frame cavity. The oil droplets in the frame cavity eventually pass through the bottom plate oil drain hole 111 under the influence of its own weight, thereby achieving the processing and discharge of the oil droplets. By using the air duct assembly 300, the smoke in the gas collecting chamber 200 and another portion of the oil droplets can be blown into the exhaust passage and discharged into the external environment through the exhaust passage, thereby achieving the processing and discharge of the smoke. When flowing through the smoke exhaust channel, the swept oil droplets can adhere to the side walls of the smoke exhaust channel, and then be able to converge with the oil droplets at the bottom of the smoke exhaust channel under the influence of their own weight. The above design greatly reduces the probability of oil droplets being directly swept to the external environment, optimizes the emission capacity of the noise reduction oil smoke suction and exhaust system, and reduces the pollution to the external ambient air. Through the design of the return air baffle 401 and the wind baffle 402, the positive pressure wind in the smoke exhaust channel can be blocked from passing through the oil dripping passage and the bottom oil discharge hole 440, thereby effectively ensuring that the wind in the smoke exhaust channel moves according to the predetermined trajectory. While avoiding the wind affecting the flow of oil droplets, it can also reduce the situation where the wind rushes around in the gas collecting chamber 200 and the frame cavity to generate noise. The above structural improvements can achieve the purpose of noise reduction while ensuring smooth oil dripping and not affecting the air volume and pressure, thereby bringing a comfortable user experience and ensuring the physical and mental health of the user. The above improvements are simple and reliable, with low processing costs and high structural stability.

[0035] Specifically, a smoke exhaust port 410 is opened on the side of the smoke exhaust port, and the smoke exhaust port 410 is connected to the external environment.

[0036] In this embodiment, the wind shield 402 and the side wall of the smoke exhaust channel form a bottom windproof cavity 460, and the bottom oil drain hole 440 is connected to the smoke exhaust channel through the bottom windproof cavity 460. The portion of the side wall of the smoke exhaust channel forming the bottom windproof cavity 460 gradually tilts downward toward the bottom oil drain hole 440. The provision of the bottom windproof cavity 460 can provide a windproof area near the bottom oil drain hole 440, thereby effectively preventing a large amount of wind from entering the bottom oil drain hole 440. The downward tilt of the portion of the side wall of the smoke exhaust channel forming the bottom windproof cavity 460 ensures the ability of the bottom oil drain hole 440 to discharge oil droplets, prevents the accumulation of oil droplets in the bottom windproof cavity 460, and thus improves the ability of the noise reduction oil smoke suction and exhaust system to discharge oil droplets.

[0037] Preferably, the return air baffle 401 and the sidewalls of the smoke exhaust duct form a top windshield 450. The oil dripping passage is connected to the top windshield 450, and the top windshield 450 is connected to the smoke exhaust duct through a top opening. Specifically, the top opening is oriented perpendicular to the trajectory of wind within the smoke exhaust duct. The provision of the top windshield 450 provides a windproof area near the oil dripping passage, effectively preventing excessive wind from entering the dripping passage.

[0038] Furthermore, the bottom windproof cavity 460 is connected to the smoke exhaust channel through the bottom opening, and the top opening and the bottom opening are staggered. Specifically, the direction of the bottom opening is perpendicular to the movement trajectory of the wind in the smoke exhaust channel. Preferably, the bottom oil drain hole 440 and the bottom plate oil drain hole 111 are staggered. The design of staggering the bottom openings and the bottom oil drain hole 440 and the bottom plate oil drain hole 111 avoids the situation where the wind blows directly between the bottom openings and the bottom openings or the bottom oil drain hole 440 and the bottom plate oil drain hole 111, avoids the generation of whistling sounds, and thus achieves the purpose of noise reduction.

[0039] In this embodiment, one end of the windshield 402 is fixed to the side wall of the smoke exhaust duct, and the windshield 402 gradually slopes downward from the connected end to the free end. This design not only reduces the impact of the windshield 402 on the air volume and pressure within the smoke exhaust duct, but also further reduces the probability of air entering the bottom windshield cavity 460 by reducing the size of the bottom opening, thereby further improving the structure of the smoke exhaust box assembly 400.

[0040] Preferably, one end of the return air baffle 401 is fixedly connected to the side wall of the smoke exhaust passage, and the return air baffle 401 gradually tilts downward from the connection end to the free end. The downward tilt of the return air baffle 401 ensures the ability of the oil drip passage to drain oil droplets, preventing oil droplets from accumulating in the top windshield 450, thereby improving the oil droplet discharge capability of the noise-reducing oil fume suction and exhaust system.

[0041] In this embodiment, the frame shell 100 includes a frame bottom plate 110, and the bottom plate oil drain hole 111 passes through the frame bottom plate 110, and the frame bottom plate 110 gradually tilts downward toward the bottom plate oil drain hole 111. Specifically, the bottom of the gas collecting chamber 200 gradually tilts downward toward the gas collecting port 201, and the bottom of the gas collecting box assembly is designed to fit the top of the smoke exhaust box assembly 400; the portion of the side wall of the smoke exhaust channel where the bottom windshield cavity 460 is not formed gradually tilts downward toward the bottom opening. The above design avoids the accumulation of oil droplets on the frame bottom plate 110, the bottom of the gas collecting chamber 200, and the bottom of the smoke exhaust channel, thereby further improving the ability of the noise reduction oil smoke suction and exhaust system to discharge oil droplets.

[0042] Preferably, the frame shell 100 also includes a frame side panel 120 and a frame storage cabinet 130. The frame side panel 120 is fixedly connected to the frame bottom panel 110, and the frame side panel 120 is used to block the side of the frame cavity. The sealed connection between the frame side panel 120 and the frame bottom panel 110 ensures the sealing effect in the frame cavity, further improving the noise reduction capability of the noise reduction oil fume suction and exhaust system. The lower surface of the frame bottom panel 110 is fixedly connected to the frame storage cabinet 130, and the frame storage cabinet 130 is used to carry the oil collection unit 600. The top of the oil collection unit 600 is provided with an oil collection trough, and the oil collection trough is used to collect oil droplets dripping from the bottom oil discharge hole 440. The above design realizes the collection of oil droplets, which not only improves the efficiency of collecting discharged oil droplets, but also ensures the cleanliness of the kitchen environment.

[0043] In this embodiment, a gas collection port 201 is defined at the bottom of the gas collecting box assembly, and a top oil drain hole 430 is defined at the top of the smoke exhaust passage. Gas collection port 201 and top oil drain hole 430 are connected to form an oil dripping passage. This simple, reliable, and easily fabricated structure ensures that oil droplets fall accurately and smoothly from gas collection chamber 200 into the smoke exhaust passage.

[0044] In this embodiment, a connecting flange is provided around the edge of the gas collection port 201, which slopes gradually downward toward the gas collection port 201. The connecting flange is inserted into the top oil drain hole 430, and the connecting flange and the top oil drain hole 430 have an interference fit. This design ensures a tight seal between the gas collection port 201 and the top oil drain hole 430, while also significantly reducing the risk of oil droplets escaping through assembly gaps.

[0045] In this embodiment, the air duct assembly 300 includes an air outlet pipe, and a connecting opening 420 is defined in the smoke exhaust passage. The air outlet pipe and connecting opening 420 are sealed together by a sealing ring 500, and the air duct assembly 300 blows air into the smoke exhaust passage through the air outlet pipe. Specifically, the air duct assembly 300 and the smoke exhaust passage are sealed together by a flanged structure that sandwiches the outer wall of the air outlet pipe and the edge of the connecting opening 420, with the edge of the sealing ring 500 sandwiched between the gas collecting box assembly and the smoke exhaust box assembly 400. The above structural improvements not only improve the assembly efficiency of the smoke exhaust channel, the sealing ring 500 and the air duct assembly 300, but also greatly optimize the sealing effect of the connection between the air outlet pipe and the sealing ring 500 and the smoke exhaust channel and the sealing ring 500, thereby ensuring the sealing performance of the sealing structure and preventing the oil smoke discharged into the smoke exhaust channel from flowing back through the assembly gap when the air duct assembly 300 is working. The connection between the above structures is stable and reliable, solving the problems of oil leakage and air volume leakage between the air duct assembly 300 and the smoke exhaust channel, and further reducing the noise generated by the assembly gap between the smoke exhaust channel, the sealing ring 500 and the air duct assembly 300.

[0046] like Figure 1 and Figure 7As shown, the air duct assembly 300 also includes a centrifugal fan and a rectifier mesh 340 affixed to the centrifugal fan. The rectifier mesh 340 is hemispherical and uniformly distributed with multiple hexagonal holes. The centrifugal fan is used to blow the oil smoke that passes through the hexagonal holes into the exhaust duct. The hexagonal holes and the hemispherical shape of the rectifier mesh 340 improve the way the centrifugal fan extracts oil smoke from the plenum chamber 200. While maintaining its ability to filter oil smoke, it also provides a stable flow effect, thereby achieving the purpose of noise reduction. Specifically, the rectifier mesh 340 is affixed to the open end of the centrifugal fan.

[0047] Preferably, the centrifugal fan includes a fan body, a fan duct 310, a guide ring 330, an impeller module 350, a hood 360, and a plurality of fan blades 320. The impeller of the impeller module 350 is capable of rotating about the axis of the impeller module 350. The plurality of fan blades 320 are circumferentially spaced around the axis of the impeller module 350, forming a flow channel between two adjacent fan blades 320. The air extracted by the impeller module 350 passes through the flow channel between the plurality of fan blades 320 and enters the air outlet pipe through the fan duct 310. The connecting shaft of the impeller module 350 passes through the mounting hole on the fan body and is connected to the hood 360. By screwing the hood 360, the tightness of the connection between the hood 360 and the connecting shaft can be adjusted, thereby facilitating the disassembly and assembly of the impeller module 350 on the fan body. The guide ring 330 is fixed to the open end of the centrifugal fan and serves to guide the airflow.

[0048] Furthermore, the blade curve profile of the fan blade 320 is a Bezier curve, and the cross-sectional area of the flow channel gradually decreases from the flow channel inlet to the flow channel outlet, thereby achieving the effect of noise reduction.

[0049] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A noise reduction oil fume suction and exhaust system, characterized in that: The invention comprises a frame housing (100), wherein a frame cavity is formed in the frame housing (100), a bottom plate oil drain hole (111) is opened at the bottom of the frame housing (100), and the frame cavity is provided with: A smoke exhaust box assembly (400), wherein a smoke exhaust passage communicating with the external environment is formed in the smoke exhaust box assembly (400); An air collecting box assembly, wherein an air collecting cavity (200) is formed in the air collecting box assembly, the air collecting cavity (200) is located above the smoke exhaust channel, an air duct assembly (300) is provided in the air collecting cavity (200), and the air duct assembly (300) is used to blow air into the smoke exhaust channel; The bottom of the gas collecting chamber (200) is connected to the top of the smoke exhaust channel through an oil dripping passage, and a return air baffle (401) located below the oil dripping passage is provided in the smoke exhaust channel, and the return air baffle (401) is used to block the wind flowing through the smoke exhaust channel from entering the oil dripping passage; the bottom of the smoke exhaust box assembly (400) is provided with a bottom oil drain hole (440) connecting the smoke exhaust channel and the frame cavity, and a wind shield (402) located above the bottom oil drain hole (440) is provided in the smoke exhaust channel, and the wind shield (402) is used to block the wind flowing through the smoke exhaust channel from passing through the bottom oil drain hole (440).

2. The noise reduction oil fume suction and exhaust system according to claim 1, characterized in that: One end of the wind shield (402) is fixed to the side wall of the smoke exhaust channel, and the wind shield (402) gradually tilts downward from the connection end to the free end.

3. The noise reduction oil fume suction and exhaust system according to claim 1, characterized in that: One end of the return air baffle (401) is fixed to the side wall of the smoke exhaust channel, and the return air baffle (401) gradually tilts downward from the connection end to the free end.

4. The noise reduction oil fume suction and exhaust system according to claim 1, characterized in that: The return air baffle (401) and the side wall of the smoke exhaust channel form a top windproof cavity (450), the oil dripping passage is connected to the top windproof cavity (450), the top windproof cavity (450) is connected to the smoke exhaust channel through a top opening, the wind baffle (402) and the side wall of the smoke exhaust channel form a bottom windproof cavity (460), the bottom oil discharge hole (440) is connected to the smoke exhaust channel through the bottom windproof cavity (460), the bottom windproof cavity (460) is connected to the smoke exhaust channel through a bottom opening, and the top opening and the bottom opening are staggered.

5. The noise reduction oil fume suction and exhaust system according to claim 1, characterized in that: The bottom oil drain hole (440) and the bottom plate oil drain hole (111) are arranged in a staggered manner.

6. The noise reduction oil fume suction and exhaust system according to claim 1, characterized in that: The frame housing (100) comprises a frame bottom plate (110), the bottom plate oil drain hole (111) passes through the frame bottom plate (110), and the frame bottom plate (110) gradually slopes downward toward the bottom plate oil drain hole (111).

7. The noise reduction oil fume suction and exhaust system according to claim 1, characterized in that: The bottom of the gas collecting box assembly is provided with a gas collecting port (201), the top of the smoke exhaust channel is provided with a top oil drain hole (430), and the gas collecting port (201) is connected with the top oil drain hole (430) to form the oil dripping passage.

8. The noise reduction oil fume suction and exhaust system according to claim 1, characterized in that: The air duct assembly (300) comprises an air outlet pipe, the smoke exhaust channel is provided with a communication port (420), the air outlet pipe and the communication port (420) are sealed and connected via a sealing ring (500), and the air duct assembly (300) blows air into the smoke exhaust channel via the air outlet pipe.

9. The noise reduction oil fume suction and exhaust system according to claim 8, characterized in that: The air duct assembly (300) further comprises a centrifugal fan and a rectifying net (340) fixedly connected to the centrifugal fan, wherein the rectifying net (340) is hemispherical and has a plurality of hexagonal holes evenly distributed thereon, and the centrifugal fan is used to blow the oil smoke passing through the hexagonal holes toward the smoke exhaust channel.

10. An integrated stove, characterized in that: It comprises a machine head and the noise reduction oil fume suction and exhaust system according to any one of claims 1 to 9, wherein the machine head is used for collecting oil fume and conveying the oil fume into the gas collecting chamber (200).

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