Side suction type range hood

Abstract

The utility model provides a side suction type range hood, the side suction type range hood comprises an exhaust fume collecting hood and an air deflector assembly, the air deflector assembly is installed in a trumpet-shaped opening of the exhaust fume collecting hood through a connecting piece, at least one air inlet is formed between the peripheral edge of the air deflector assembly and the inner wall of the exhaust fume collecting hood, and the air inlet is communicated with the exhaust fume collecting hood. The effective air inlet area of the air inlet is S1, the area of the forward projection of the opening is the theoretical total air inlet area, the theoretical total air inlet area is S2, and the value range of the ratio lambda of S1 to S2 is 0.5 lt; lambda < lt >; and 0.8. In order to balance the air volume, the air pressure and the noise, the value range of lambda is set to be 0.5 lt; lambda < lt >; and 0.8, an effective air inlet area which is large enough can be ensured to maintain large air volume, meanwhile, through proper area constraint of the exhaust fume collecting hood, an air speed and negative pressure which are high enough are formed at the air inlet, powerful'grabbing 'force on oil fume is realized, noise of the range hood is reduced, and the size of the exhaust fume collecting hood is coordinated and attractive.

Description

Technical Field

[0001] This utility model relates to an electrical appliance, and more particularly to a side-suction range hood. Background Technology

[0002] Existing range hoods include a fan, an air inlet, and a baffle plate, with the air inlet located on the baffle plate. To increase the coverage area of ​​the range hood, the baffle plate is usually made relatively large, while the air inlet is relatively small. At the same time, to improve the suction effect, the fan power has to be increased, which affects the aesthetics of the range hood and generates more noise. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defect of unreasonable size configuration of air inlet and smoke baffle in existing range hoods, and to provide a side-suction range hood.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A side-draft range hood includes a smoke collection hood and an air guide plate assembly. The air guide plate assembly is installed in the flared opening of the smoke collection hood via a connector. At least one air inlet is formed between the four edges of the air guide plate assembly and the inner wall of the smoke collection hood. The effective air inlet area is S1, and the area of ​​the frontal projection of the opening is the theoretical total air inlet area, which is S2. The ratio λ of S1 and S2 ranges from 0.5 < λ < 0.8.

[0006] In this design, since the inlet area directly affects the fan load and airflow characteristics, to balance airflow, air pressure, and noise, after multiple simulations, it was determined that the value of λ should be set to 0.5 < λ < 0.8. This ensures a sufficiently large effective inlet area to maintain a large airflow. Simultaneously, by appropriately constraining the area of ​​the fume hood, a sufficiently high wind speed and negative pressure are formed at the inlet, achieving a strong "capture" force for the fumes. This also limits the noise of the range hood to a reasonable range and makes the size of the fume hood aesthetically pleasing. If λ is too low (< 0.5), the actual inlet will be too small. Although the wind speed will increase, it will lead to a sharp increase in inlet resistance, increased fan load, greater noise, and a possible decrease in total airflow, affecting the extraction efficiency under large fumes. If λ is too high (> 0.8), the actual inlet will be too large, approaching the opening area. This will reduce the wind speed and negative pressure intensity near the fume inlet, leading to a decrease in the fume capture capacity (especially for initially diffused fumes), making it easier for fumes to escape. By controlling the actual effective air intake area of ​​the side-draft range hood between 50% and 80% of its theoretical maximum opening area, a clever balance is struck between capture range, suction power, operating efficiency, and noise. This is not an arbitrary value, but rather an engineering balance achieved between "effective suction," "effective exhaust," and "low noise," thereby improving the overall performance of the product. This is a typical example of how modern range hoods have evolved from extensive to refined and scientific design.

[0007] Preferably, one end of the connector is connected to the inner wall of the smoke hood, and the other end of the connector is connected to the inner surface of the air guide plate assembly. The four connectors are evenly spaced at the four corners of the air guide plate assembly.

[0008] In this design, four connectors are evenly distributed at the four corners of the air guide plate assembly, forming a symmetrical and stable support frame. This layout effectively disperses the airflow force and its own weight borne by the air guide plate assembly, preventing resonance or swaying caused by fan operation, thereby improving structural reliability and reducing operating noise. Furthermore, by placing all connectors internally (connecting the inner wall of the smoke hood to the inner surface of the air guide plate), the front appearance of the air guide plate is complete and simple when viewed from the outside, with no visible fasteners, enhancing the product's aesthetics.

[0009] Preferably, the air guide plate assembly is inclined relative to the smoke hood so that the inner diameter of the air inlets on both sides of the air guide plate assembly gradually decreases from top to bottom;

[0010] And / or, the upper end of the smoke hood is provided with a forward-protruding forehead;

[0011] And / or, the two sides of the smoke collection hood are also provided with smoke-blocking side plates, one side of the smoke-blocking side plate is connected to the smoke collection hood, and the other side of the smoke-blocking side plate extends forward and protrudes.

[0012] In this design, the air guide plate assembly is tilted relative to the fume hood, creating a gradient change in the inner diameter of the air inlets on both sides, gradually decreasing from top to bottom. This creates an "adaptive" flow field that matches the natural rising pattern of cooking fumes—the larger upper opening facilitates the intake of a large amount of diffused fumes at a relatively low flow rate, reducing flow resistance; the narrower lower opening creates a higher local wind speed in the fume-generating area near the stove, enhancing the "capture" of initial fumes. This design effectively suppresses the lateral escape of fumes during their ascent. The tilted air guide plate assembly and the downwardly narrowing gaps allow oil droplets condensed on the surface of the air guide plate assembly to flow more smoothly downwards along the plate under gravity, converging into the lower oil collection area. This reduces the accumulation of oil at the edges of key air inlet gaps, helps maintain a stable long-term air inlet area (maintaining a stable λ value), and reduces the frequency of cleaning and maintenance.

[0013] The "forehead" is a dual physical and aerodynamic barrier located above the path of rising cooking fumes. It creates a forward-extending localized low-pressure zone or airflow guiding surface above the main air intake of the fume hood. As cooking fumes rise from the stove and begin to diffuse naturally, this structure actively "intercepts" and guides the initial outward-spreading airflow downwards, forcing it into the main air intake area below. This significantly reduces the likelihood of fumes drifting upwards and outwards prematurely before being inhaled, greatly improving capture efficiency. The forward-protruding structure physically expands the coverage area of ​​the top of the fume hood, allowing the negative pressure zone generated by the fan to extend forward and act on the space above the cooking area earlier, forming a wider "invisible fume hood," which is particularly helpful in capturing the large areas of fumes that are instantly generated and rapidly rise during stir-frying. Structurally, the forehead directly blocks some of the rising fumes and heat from directly impacting the rear wall or cabinets, providing physical protection. Meanwhile, its surface is usually designed with an appropriate tilt angle, which allows the condensed oil droplets to flow forward to the front edge of the fume hood or the air guide plate area, and finally flow into the oil cup, optimizing the internal oil path and reducing oil accumulation at the top.

[0014] The forward-extending smoke-blocking side panel, together with the air guide plate assembly on the front of the smoke hood and the upper protruding forehead, forms a "U"-shaped or semi-enclosed physical barrier. This completely changes the traditional two-dimensional mode of side-suction hoods that relies solely on frontal negative pressure air intake, upgrading smoke control from a "point" or "surface" approach to a "three-dimensional space." It effectively blocks the escape paths of smoke from both sides, making it particularly suitable for lateral smoke diffusion generated when two stoves are working simultaneously or when cookware is moved, achieving full-area coverage protection for the cooking area.

[0015] Preferably, the air guide plate assembly includes a back plate and a front plate, the back plate is mounted to the smoke hood via a connector, and the front plate is mounted to the back plate via a magnetic component;

[0016] Alternatively, the air guide plate assembly includes a back plate and a front plate, the back plate being mounted to the smoke hood via a connector, and the front plate being made of glass, which is bonded to the back plate.

[0017] In this solution, the magnetic attachment makes panel removal and installation extremely convenient, requiring no tools. Users can easily remove the panel for thorough cleaning of both sides, solving the pain points of traditional integrated air guides, such as numerous hard-to-clean areas and inconvenient wiping. On the production line, the back panel can be installed and tested first, and the panel, as the last large exterior component, is quickly assembled via magnetic attachment, simplifying the assembly process. In after-sales service, if the panel needs to be replaced due to impact or corrosion, it can be done independently without disassembling the entire air guide assembly and internal air ducts, significantly reducing maintenance costs and time. The split design provides independent design space for the panel's material, color, and surface treatment (such as glass or coating), easily achieving product line diversification and meeting the matching needs of different kitchen decoration styles. The magnetic connection method also makes it possible to provide users with replaceable personalized panels in the future. The split design of the air guide assembly, with its "fixed back panel + magnetic panel," is a user-centric and well-thought-out engineering solution. It successfully enhances user experience (easy to clean and maintain) and manufacturing efficiency without compromising core performance (aerodynamic structural stability). This design is a typical example of the evolution of range hoods from "durable appliances" to "user experience-friendly appliances," and together with the aforementioned innovations in airflow efficiency, it constitutes the product's overall high-end competitiveness.

[0018] Preferably, a limiting step is provided at the lower end of the back plate, and the panel is engaged with the limiting step;

[0019] And / or, the middle part of the smoke hood is provided with a confluence hole communicating with the air inlet, and the back plate is provided with a spherical protrusion protruding towards the confluence hole at a position opposite to the confluence hole.

[0020] In this design, the limiting step supports the panel from below, reducing the tightening force required to fix the panel and improving reliability. The limiting step serves both to secure the panel to the back panel and to create an installation reference, facilitating quick alignment and installation of the panel and back panel, thus improving installation efficiency.

[0021] A smoke collection chamber is formed between the air guide plate assembly and the smoke collection hood. The air inlet connects to the confluence hole through the smoke collection chamber. When the fan at the rear starts, the flue gas enters the smoke collection chamber through the air inlet, converges at the confluence hole, and then flows to the smoke pipe at the rear. A spherical protrusion is provided on the back plate to rectify the flue gas in the smoke collection chamber, allowing the flue gas to flow quickly along its surface to the confluence hole, thus increasing the flue gas velocity. Placing the spherical protrusion for rectification on the back plate also avoids affecting the appearance of the panel, keeping the panel flat and improving its aesthetics.

[0022] Preferably, the smoke collection hood has a converging hole in the middle that communicates with the air inlet. The side-suction range hood also includes a filter assembly, which is installed on the smoke collection hood and covers the converging hole. The filter assembly includes an oil-separating mesh and a noise-reducing mesh, with the oil-separating mesh located upstream of the noise-reducing mesh.

[0023] In this design, the oil separator is positioned upstream of the airflow to intercept and agglomerate most of the liquid grease particles and large particles in the fumes, achieving the first stage of efficient physical separation. This ensures that the airflow entering downstream is relatively clean, significantly reducing the risk of oil adhesion and accumulation on the subsequent noise reduction screen and fan impeller. This guarantees the dynamic balance and efficiency of the fan during long-term operation and extends the service life of core components. The noise reduction screen is installed downstream of the oil separator, adjacent to the fan inlet, a critical area for aerodynamic noise generation. The airflow, "purified" by the oil separator, is more stable, and its porous structure further reduces mid-to-high frequency airflow noise and turbulence noise. Simultaneously, the pre-positioned oil separator prevents the noise reduction screen pores from being quickly clogged with oil, ensuring that the noise reduction screen maintains its designed airflow permeability over the long term, balancing noise reduction effectiveness with airflow maintenance.

[0024] Preferably, the smoke hood has a converging hole in the middle that communicates with the air inlet, and the inner wall of the smoke hood also has a secondary air inlet. The secondary air inlets are provided on both sides of the converging hole. The side-suction range hood also includes a fan, which is installed inside the smoke hood. The secondary air inlets are connected to the rear air inlet of the fan.

[0025] In this design, in addition to the main air inlet formed around the perimeter of the original air guide plate assembly (responsible for capturing frontal fumes), vertical secondary air inlets are added on both sides of the air duct throat (convergence hole). This is equivalent to opening an auxiliary, close-range replenishment channel in the core area where fumes gather. When encountering a sudden surge of fumes generated by stir-frying, the main air inlet may be temporarily saturated. At this time, the secondary air inlets can directly and quickly replenish the escaping fumes and heat from both sides, effectively preventing fumes overflow due to excessive instantaneous load, and significantly enhancing the system's redundancy and dynamic response speed in handling peak conditions.

[0026] The secondary air inlet is directly connected to the rear air inlet of the fan, which is an optimized airflow path design. It allows a portion of the airflow (especially airflow converging from both sides) to enter the fan directly via a shorter path and with less resistance, helping to balance the intake pressure and flow rate before and after the fan impeller and improving the fan's workload curve. This enhances the fan's operational stability and efficiency under complex conditions, and has a positive effect on reducing energy consumption and extending the fan's lifespan.

[0027] Preferably, the side-suction range hood further includes an oil collection box, which is detachably connected to the lower edge of the smoke hood and located below the air guide plate assembly. The oil collection box extends along the length of the air guide plate assembly, and the opening of the oil collection box faces upward.

[0028] In this design, the oil collection box extends along the entire length of the lower edge of the air guide plate assembly, with its opening facing upwards, precisely forming a "receiving groove." It effectively collects condensed oil droplets flowing from the inclined air guide plate surface, as well as grease that may drip from the filter assembly, achieving "centralized collection and targeted management." This avoids secondary pollution caused by random oil drips from the bottom of the machine or the wall, fundamentally solving the common "oil dripping" problem of side-suction range hoods and maintaining a clean kitchen environment.

[0029] Preferably, the lower end of the air guide plate assembly is provided with a plurality of ventilation holes, the plurality of ventilation holes are arranged along the length direction of the air guide plate assembly, and the plurality of ventilation holes form an air inlet located at the lower end of the air guide plate assembly.

[0030] In this design, a row of ventilation holes is created at the bottom of the air guide plate assembly, closest to the cookware and burner. This provides a near-zero-distance, minimal-resistance vertical suction path for cooking fumes, especially the newly generated and rising thick clouds of fumes. It enables "direct" suction of the initial rising stage of the fumes, greatly shortening the time required for fume diffusion, and particularly improving the instantaneous capture efficiency and response speed when stir-frying or other activities that generate large amounts of low-altitude fumes.

[0031] Preferably, the ventilation hole is an oblong hole, which is arranged vertically.

[0032] In this design, cooking fumes rise vertically from the cookware. The vertically positioned waist-shaped orifice, with its long axis aligned with the main airflow direction, significantly reduces turning losses and local resistance during airflow entry, resulting in smoother intake. The waist-shaped orifice combines the uniform stress of a circular orifice with the large effective area of ​​a rectangular orifice. Its rounded ends smooth the airflow and reduce turbulence, while the straight middle edge provides a concentrated, effective ventilation area. This shape ensures sufficient intake area while maintaining a higher airflow velocity at the orifice opening, enhancing the "capture" of initial cooking fumes. Furthermore, the smooth edges of the orifice, without sharp corners, make it easier to wipe away surface grease, or, under the combined effect of internal airflow and surface condensation, guide the grease downwards along the vertical orifice wall, reducing the risk of grease clogging the ventilation holes and helping to maintain the design performance over the long term.

[0033] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0034] The positive and progressive effects of this invention are as follows: Since the air inlet area directly affects the fan load and airflow characteristics, in order to balance air volume, air pressure, and noise, after multiple simulations, it was determined that the value range of λ is set to 0.5 < λ < 0.8. This ensures a sufficiently large effective air inlet area to maintain a large air volume. At the same time, through the appropriate area constraint of the fume hood, a sufficiently fast wind speed and negative pressure are formed at the air inlet, achieving a strong "capture" force for oil fumes. Simultaneously, the noise of the range hood is limited to a reasonable range, and the size of the fume hood is also coordinated and aesthetically pleasing. If λ is too low (< 0.5), the actual air inlet will be too small. Although the wind speed will increase, it will lead to a sharp increase in air inlet resistance, an increase in fan load, greater noise, and a possible decrease in total air volume, affecting the extraction efficiency when dealing with large amounts of oil fumes. If λ is too high (> 0.8), the actual air inlet will be too large, approaching the opening area. This will reduce the wind speed and negative pressure intensity near the smoke inlet, leading to a decrease in the oil fume capture capacity (especially for initially diffused oil fumes), making it easier for oil fumes to escape. By controlling the actual effective air intake area of ​​the side-draft range hood between 50% and 80% of its theoretical maximum opening area, a clever balance is struck between capture range, suction power, operating efficiency, and noise. This is not an arbitrary value, but rather an engineering balance achieved between "effective suction," "effective exhaust," and "low noise," thereby improving the overall performance of the product. This is a typical example of how modern range hoods have evolved from extensive to refined and scientific design. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a side-suction range hood according to a preferred embodiment of the present invention. Figure 1 .

[0036] Figure 2This is a schematic diagram of the structure of a side-suction range hood according to a preferred embodiment of the present invention. Figure 2 .

[0037] Figure 3 This is a schematic diagram of the structure of a side-suction range hood with the air guide plate assembly hidden in a preferred embodiment of the present invention. Figure 3 .

[0038] Figure 4 This is a structural schematic diagram of the air guide plate assembly according to a preferred embodiment of the present invention.

[0039] Figure 5 This is a schematic diagram of the structure of the back plate of a preferred embodiment of the present invention. Figure 1 .

[0040] Figure 6 This is a schematic diagram of the structure of the back plate of a preferred embodiment of the present invention. Figure 2 .

[0041] Figure 7 This is a schematic diagram of the structure of an oil separator mesh according to a preferred embodiment of the present invention.

[0042] Figure 8 This is a schematic diagram of the structure of a noise reduction network according to a preferred embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures:

[0044] Smoke hood 1

[0045] Forehead 11

[0046] Smoke shield side panel 12

[0047] Manifold 13

[0048] Air guide plate assembly 2

[0049] Backplate 21

[0050] Limiting step 211

[0051] Spherical convex hull 212

[0052] Panel 22

[0053] Ventilation hole 23

[0054] Connector 3

[0055] Filter assembly 4

[0056] Oil separator 41

[0057] Noise Reduction Network 42

[0058] Oil collection box 5

[0059] Air inlet 10

[0060] Opening 20

[0061] Secondary air inlet 30 Detailed Implementation

[0062] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0063] like Figures 1-8 As shown, this embodiment discloses a side-draft range hood, which includes a smoke collection hood 1 and an air guide plate assembly 2. The air guide plate assembly 2 is installed in the flared opening 20 of the smoke collection hood 1 via a connector 3. At least one air inlet 10 is formed between the four edges of the air guide plate assembly 2 and the inner wall of the smoke collection hood 1. The effective air intake area of ​​the air inlet 10 is S1, and the area of ​​the frontal projection of the opening 20 is the theoretical total air intake area, which is S2. The ratio λ of S1 and S2 ranges from 0.5 to 0.8. The theoretical total air intake area refers to the area of ​​the end face of the flared opening 20 of the smoke collection hood 1 in the frontal projection direction, which can be understood as the maximum potential capture range of the range hood "facing" the smoke area. The effective air intake area of ​​the air inlet 10 is the sum of the cross-sectional areas perpendicular to the gas flow direction of all gaps and ventilation holes 23 formed between the four edges of the air guide plate assembly 2 and the inner wall of the smoke collection hood 1 after installation. This is the actual physical channel through which cooking fumes are inhaled.

[0064] Since the area of ​​the air inlet 10 directly affects the fan load and airflow characteristics, in order to balance air volume, air pressure, and noise, after multiple simulations, it was determined that the value range of λ should be set to 0.5 < λ < 0.8. This ensures a sufficiently large effective air inlet area to maintain a large air volume. At the same time, through the appropriate area constraint of the fume hood 1, a sufficiently fast wind speed and negative pressure are formed at the air inlet 10, achieving a strong "capture" force for the oil fumes. This also limits the noise of the range hood to a reasonable range and makes the size of the fume hood 1 harmonious and aesthetically pleasing. If λ is too low (< 0.5), the actual air inlet 10 will be too small. Although the wind speed will increase, it will lead to a sharp increase in air intake resistance, an increase in fan load, and greater noise. The total air volume may also decrease, affecting the suction and exhaust efficiency when there is a large amount of oil fume. If λ is too high (> 0.8), the actual air inlet 10 will be too large, approaching the area of ​​the opening 20. This reduces the wind speed and negative pressure near the smoke inlet, leading to a decrease in the ability to capture cooking fumes (especially those initially diffused), making it easier for fumes to escape. By controlling the actual effective air intake area of ​​the side-draft range hood to between 50% and 80% of the theoretical maximum opening area, a clever balance is struck between capture range, suction power, operating efficiency, and noise. This is not an arbitrary value, but rather an optimal engineering balance between "effective suction," "effective exhaust," and "low noise," thereby improving the overall performance of the product. This is a typical example of how modern range hoods have moved from extensive design to refined and scientific design.

[0065] The range hood in this embodiment, through the reasonable configuration of the λ value, achieves significantly lower operating noise than traditional designs while maintaining the same or even better suction power, providing users with a quieter cooking environment. It changes the traditional range hood's "sucking" mode from only the bottom, creating a multi-directional "encirclement" and "covering" of fumes through four-sided air intake, effectively preventing the fumes from spreading and dissipating during their ascent, and is especially efficient at capturing the large amounts of instantaneous fumes generated during stir-frying.

[0066] Preferably, the fan is positioned close to the air guide plate assembly 2, shortening the distance between the source of oil fumes (cookware) and the fan's air inlet 10. This allows the fan to directly create a stronger and more concentrated negative pressure zone above the cookware, while also making the fume hood 1 smaller and more compact. The funnel-shaped opening 20 of the fume hood 1 is located to the side of the source of oil fumes, which facilitates the formation of a negative pressure zone, improving the suction effect, and also increases the coverage area of ​​the fume hood 1.

[0067] like Figures 1-4As shown, one end of connector 3 is connected to the inner wall of the smoke hood 1, and the other end of connector 3 is connected to the inner surface of the air guide plate assembly 2. Four connectors 3 are evenly spaced at the four corners of the air guide plate assembly 2. The four connectors 3, evenly distributed at the four corners of the air guide plate assembly 2, form a symmetrical and stable support frame. This layout effectively disperses the airflow force and its own weight borne by the air guide plate assembly 2, preventing resonance or shaking caused by fan operation, thereby improving structural reliability and reducing operating noise. Furthermore, by placing all connectors 3 internally (connecting the inner wall of the smoke hood 1 to the inner surface of the air guide plate), the front appearance of the air guide plate is complete and simple when viewed from the outside, with no visible fasteners, improving the product's aesthetics. This connection method allows the air guide plate assembly 2 to be installed and disassembled as a single module. This simplifies operation during production assembly and subsequent maintenance and cleaning, helping to improve production efficiency and reduce after-sales maintenance costs.

[0068] like Figure 1 As shown, the air guide plate assembly 2 is inclined relative to the smoke hood 1, so that the inner diameter of the air inlets 10 on both sides of the air guide plate assembly 2 gradually decreases from top to bottom. This creates an "adaptive" flow field that matches the natural rising pattern of cooking fumes—the larger upper opening facilitates the intake of a large amount of diffused fumes at a relatively low flow rate, reducing flow resistance; the narrower lower opening creates a higher local wind speed in the fume-generating area near the stove, enhancing the "capture" of initial fumes. This design effectively suppresses the lateral escape of fumes during their ascent. The inclined air guide plate assembly 2 and the downward-narrowing gap allow oil droplets condensed on the surface of the air guide plate assembly 2 to flow more smoothly downward along the plate surface under the action of gravity and collect in the lower oil collection area. This reduces the accumulation of oil at the edge of the key air intake gap, which is conducive to maintaining a stable air intake area in the long term (maintaining a stable λ value) and reducing the frequency of cleaning and maintenance.

[0069] like Figure 1As shown, the upper end of the fume hood 1 has a forward-protruding forehead 11. The "forehead 11" is a dual physical and aerodynamic barrier located above the path of rising fumes. It creates a forward-extending local low-pressure zone or airflow guiding surface above the main air inlet (air guide plate area) of the fume hood 1. When fumes rise from the stove and begin to diffuse naturally, this structure actively "intercepts" and guides the initially outward-spreading fume airflow downwards, forcing it into the main air intake area below. This significantly reduces the possibility of fumes drifting upwards and outwards prematurely before being inhaled, greatly improving collection efficiency. The forward-protruding structure physically expands the coverage projection area of ​​the top of the fume hood 1, allowing the negative pressure zone generated by the fan to extend forward and act on the space above the cooking area earlier, forming a wider "invisible fume hood," which is especially helpful in capturing the large area of ​​fumes that are instantly generated and rapidly rise during stir-frying. From a structural and functional perspective, the front end 11 can directly block some of the rising fumes and heat from directly impacting the wall or cabinet behind it, providing physical protection. At the same time, its surface is usually designed with an appropriate tilt angle, which allows condensed oil droplets to flow forward to the front edge of the fume hood 1 or the air guide plate area, and finally flow into the oil cup, optimizing the internal oil path and reducing oil accumulation at the top.

[0070] like Figure 1 As shown, smoke-blocking side panels 12 are also provided on both sides of the fume hood 1. One side of the smoke-blocking side panel 12 is connected to the fume hood 1, and the other side of the smoke-blocking side panel 12 extends forward and protrudes. The forward-extending smoke-blocking side panel 12, together with the air guide plate assembly 2 on the front of the fume hood 1 and the upper protruding forehead 11, forms a "U"-shaped or semi-enclosed physical barrier. This completely changes the traditional two-dimensional mode of side-suction that relies solely on frontal negative pressure air intake, upgrading the control of oil fumes from a "point" or "surface" to a "three-dimensional space". It can effectively block the escape path of oil fumes from the left and right sides, and is particularly suitable for the lateral diffusion of oil fumes generated when two stoves are working at the same time or when cookware is moved, achieving full-area coverage protection for the cooking area. The smoke-blocking side panel 12 not only serves as a physical barrier, but is also an aerodynamic airflow guiding structure. It restricts the airflow to enter only from the front of the fume hood 1, avoiding disorderly interference from lateral airflow.

[0071] The smoke-blocking side panel 12 is deeply integrated with the top forehead panel 11, the front air guide plate assembly 2, and the precisely calculated air inlet 10 (λ value), collaboratively constructing a complete aerodynamic capture interface from the top, front, to both sides. This design incorporates all major directions of oil fume escape (up, left, and right) into active management, fundamentally solving the inherent shortcomings of side-suction range hoods in terms of smoke collection range. It is a key supporting structure for achieving the unity of "strong suction at close range" and "wide-range smoke collection".

[0072] In an optional embodiment, the air guide plate assembly 2 includes a back panel 21 and a front panel 22. The back panel 21 is mounted to the fume hood 1 via a connector 3, and the front panel 22 is mounted to the back panel 21 via a magnetic attachment. The magnetic attachment makes the disassembly and installation of the front panel 22 extremely convenient, requiring no tools. Users can easily remove the front panel 22 for thorough cleaning of both sides, solving the pain points of traditional integrated air guide plates, such as numerous hard-to-clean corners and inconvenient wiping. On the production line, the back panel 21 can be installed and tested first, and the front panel 22, as the last large exterior component, can be quickly assembled via magnetic attachment, simplifying the assembly process. In after-sales service, if the front panel 22 needs to be replaced due to collision or corrosion, it can be done independently without disassembling the entire air guide plate assembly 2 and internal air ducts, significantly reducing maintenance costs and time. The split design provides independent design space for the material, color, and surface treatment (such as glass or coating) of the front panel 22, easily achieving product line diversification and meeting the matching needs of different kitchen decoration styles. The magnetic connection method also makes it possible to provide users with replaceable personalized front panels 22 in the future. The split design of the air guide plate assembly 2, consisting of a fixed back panel 21 and a magnetic panel 22, is a user-centric and well-thought-out engineering solution. It successfully enhances the user experience (easy cleaning and maintenance) and manufacturing efficiency without compromising core performance (aerodynamic structural stability). This design is a typical example of the evolution of range hoods from "durable appliances" to "user-friendly appliances," and together with the aforementioned innovations in airflow efficiency, it constitutes the product's overall high-end competitiveness.

[0073] In this embodiment, the air guide plate assembly 2 includes a back plate 21 and a front panel 22. The back plate 21 is installed on the fume hood 1 via a connector 3, and the front panel 22 is made of glass, which is bonded to the back plate 21. This split design provides independent design space for the material, color, and surface treatment of the front panel 22, making it easy to achieve product line diversification and meet the matching needs of different kitchen decoration styles.

[0074] like Figures 4-6 As shown, a limiting step 211 is provided at the lower end of the back plate 21, and the panel 22 is engaged with the limiting step 211. The limiting step 211 supports the panel 22 from below, reducing the fastening force for fixing the panel 22 and improving reliability. The limiting step 211 is used not only to fix the panel 22 to the back plate 21, but also to form an installation reference, facilitating quick alignment and installation of the panel 22 and the back plate 21, thus improving installation efficiency.

[0075] like Figure 3As shown, the smoke hood 1 has a confluence hole 13 in the middle that communicates with the air inlet 10. A spherical protrusion 212, protruding towards the confluence hole 13, is located on the back plate 21 opposite to the confluence hole 13. A smoke collection chamber is formed between the air guide plate assembly 2 and the smoke hood 1, and the air inlet 10 communicates with the confluence hole 13 through the smoke collection chamber. When the rear fan starts, the flue gas enters the smoke collection chamber through the air inlet 10, converges at the confluence hole 13, and then flows towards the rear smoke pipe. The spherical protrusion 212 on the back plate 21 rectifies the flue gas in the smoke collection chamber, allowing it to flow rapidly along the surface of the spherical protrusion 212 towards the confluence hole 13, increasing the flue gas velocity and preventing turbulence. Placing the spherical protrusion 212 on the back plate 21 also avoids affecting the appearance of the panel 22, keeping the panel 22 flat and improving its aesthetics.

[0076] like Figure 3 , Figure 7 and Figure 8 As shown, the side-suction range hood also includes a filter assembly 4, which is installed on the smoke collection hood 1 and covers the confluence hole 13. The filter assembly 4 includes an oil-separating mesh 41 and a noise-reducing mesh 42, with the oil-separating mesh 41 located upstream of the noise-reducing mesh 42. Positioning the oil-separating mesh 41 upstream of the airflow allows it to intercept and condense most of the liquid grease particles and large particles in the fumes, completing the first efficient physical separation. This ensures that the airflow entering downstream is relatively clean, significantly reducing the risk of oil adhesion and accumulation on the subsequent noise-reducing mesh 42 and fan impeller, ensuring the dynamic balance and efficiency of the fan during long-term operation, and extending the service life of core components. The noise-reducing mesh 42 is installed downstream of the oil-separating mesh 41, adjacent to the fan inlet; this location is a key area for aerodynamic noise generation. The airflow "purified" by the oil-separating mesh 41 is more stable, and when it passes through the porous structure of the noise-reducing mesh 42, it can more effectively reduce mid-to-high frequency airflow noise and turbulence noise. Meanwhile, the front-mounted oil-blocking mesh 41 prevents the pores of the noise-reducing mesh 42 from being quickly clogged by oil, ensuring that the noise-reducing mesh 42 maintains its designed airflow permeability over the long term, thus balancing noise reduction effect and airflow maintenance. This component, as a single module, is concealed within the central through-hole for easy disassembly and maintenance. Its layered logic of "upstream oil blocking, downstream noise reduction" matches cleaning needs. Placing the frequently cleaned oil-blocking mesh 41 at the front for easy access, while the less demanding but structurally precise noise-reducing mesh 42 is protected at the rear. Users can choose to clean the entire mesh or layers as needed, improving the convenience and targeted nature of maintenance.

[0077] The design of this filter assembly 4 is not a simple stacking, but a systematic solution based on airflow path and functional requirements. By setting a "purification first, noise reduction later" collaborative barrier at the throat of the air duct (at the confluence hole 13), it achieves a balance in multiple key performance indicators such as effective grease separation, protection of the core fan, maintenance of smooth airflow, and reduction of operating noise. It is an important internal guarantee for the efficient, quiet, and durable operation of the range hood, and together with the external smoke collection structure (forehead 11, smoke baffle side panels, etc.), it constitutes a complete performance system.

[0078] In this embodiment, the oil-separating mesh 41 has a plurality of hexagonal holes arranged on it to improve oil separation efficiency. The noise-reducing mesh 42 has a plurality of diamond-shaped holes arranged on it to reduce noise.

[0079] like Figure 3 As shown, the inner wall of the fume hood 1 is also provided with a secondary air inlet 30, and secondary air inlets 30 are provided on both sides of the confluence hole 13. The side-suction range hood also includes a fan, which is installed inside the fume hood 1. The secondary air inlets 30 are connected to the rear air inlet of the fan. Preferably, the secondary air inlets 30 extend along the height direction. This design adds vertical secondary air inlets 30 on both sides of the throat of the air duct (confluence hole 13) in addition to the original main air inlet (responsible for capturing frontal fumes) formed by the air guide plate assembly 2. This is equivalent to opening an auxiliary, close-range replenishment channel in the core area where fumes gather. When encountering a sudden large amount of fumes generated by stir-frying, the main air inlet may be temporarily saturated. At this time, the secondary air inlets 30 can directly and quickly replenish the fumes and heat that have escaped here from both sides, effectively preventing the fumes from overflowing due to excessive instantaneous load, and significantly enhancing the redundancy capacity and dynamic response speed of the system in handling peak conditions.

[0080] The secondary air inlet 30 is directly connected to the rear air inlet of the fan, which is an optimized airflow path design. It allows a portion of the airflow (especially airflow converging from both sides) to enter the fan directly with a shorter path and less resistance, helping to balance the intake pressure and flow rate before and after the fan impeller and improve the fan's workload curve. This enhances the fan's operational stability and efficiency under complex conditions, and has a positive effect on reducing energy consumption and extending fan life. The "secondary air inlet 30" structure is a "smart" airflow management solution that goes beyond simply increasing air volume. It does not replace the main air intake system, but rather exists as a highly efficient dynamic supplement and internal flow field optimizer. This design significantly enhances the core functions of the range hood from both spatial (side) and system (fan load) dimensions. Together with the aforementioned λ value optimization, three-dimensional smoke collection structure (forehead 11, smoke-blocking side panel 12), and inclined design of the air guide plate assembly 2, it forms a complete aerodynamic solution system that is multi-layered and highly coordinated, encompassing external capture, internal airflow guidance, and core power matching. This represents the advanced direction of side-suction range hood technology towards refinement and systematization.

[0081] In this embodiment, secondary air inlets 30 are provided on both sides of the housing to maximize fan efficiency by utilizing the rear air intake of the fan system. The secondary air inlets 30 are located at the edge of the air guide plate assembly, close to the smoke generation point, and are vertically strip-shaped, continuously capturing oil fumes as they rise. Inside the housing, a structure separates the front and rear air inlets to prevent interference between the front and rear air intake ducts, thus avoiding reduced overall efficiency and additional noise. The area of ​​the secondary air inlets 30 must be larger than the area of ​​the rear air intake fan to prevent reduced overall efficiency due to obstructed airflow, which could affect short-term speed-up and airflow. The area of ​​the secondary air inlets 30 should not be too large; otherwise, the negative pressure will be too low to effectively draw in oil fumes. The specific dimensions need to be designed according to the characteristics of the fan system.

[0082] The side-draft range hood also includes an oil collection box 5, which is detachably connected to the lower edge of the smoke hood 1 and located below the air guide plate assembly 2. The oil collection box 5 extends along the length of the air guide plate assembly 2, with its opening facing upwards. This design, with the oil collection box 5 extending along the entire lower edge of the air guide plate assembly 2 and its opening facing upwards, precisely forms a "receiving groove." It effectively collects condensed oil droplets flowing from the inclined air guide plate surface, as well as grease that may drip from the filter assembly 4, achieving "centralized collection and targeted management." This avoids secondary pollution caused by random dripping of oil stains on the bottom of the machine or the wall, fundamentally solving the common "oil dripping" problem of side-draft range hoods and maintaining a clean kitchen environment. This design perfectly complements and completes the value loop of the inclined air guide plate assembly 2. The inclined air deflector assembly 2 promotes the directional flow of oil droplets (self-cleaning), while the elongated oil collection box 5, located directly below it and opening upwards, ensures that all the directed oil slicks are reliably captured. Simultaneously, its location below all air inlets 10 completely avoids affecting the airflow formed by the gaps around the air deflector assembly 2, ensuring that core aerodynamic performance is not compromised.

[0083] The lower end of the air guide plate assembly 2 is provided with multiple ventilation holes 23, which are arranged along the length of the air guide plate assembly 2, forming an air inlet 10 at the lower end of the air guide plate assembly 2. This provides a vertical suction path with almost zero distance and minimal resistance for oil fumes, especially the thick oil fume clouds that have just been generated and are rolling upwards. It can achieve "direct" suction of oil fumes in the initial rising stage, greatly shortening the time required for oil fume diffusion, and especially improving the instantaneous capture efficiency and response speed when a large amount of low-altitude oil fumes are generated, such as during stir-frying.

[0084] These ventilation holes 23 are cleverly positioned at the lower end of the air guide plate, precisely at the upper edge of the oil collection box 5. This arrangement ensures that the airflow drawn in from below does not directly impact the oil already collected in the oil collection box 5, avoiding potential oil droplet splashing or airflow disturbance. Simultaneously, the high-speed airflow passing through the ventilation holes 23 also acts as a scavenger, reducing the likelihood of oil condensation and accumulation at the lower edge of the air guide plate. This achieves close spatial coordination and non-interference between the two key functions of "smoke extraction" and "oil collection." When operating at low speed, the total airflow of the fan is smaller, and the wind speed at the main air inlets around the air guide plate assembly 2 is relatively low. At this time, the lower ventilation holes 23, due to their concentrated opening area and direct path, can maintain a relatively high local wind speed, ensuring effective capture of the continuously generated, slowly diffusing cooking steam and light oil fumes, thereby improving the basic performance of the range hood in low-power operation.

[0085] Ventilation hole 23 is an oblong shape, vertically positioned. As cooking fumes rise vertically from the cookware, the long axis of the oblong hole aligns with the main airflow direction, significantly reducing turning losses and localized resistance during airflow entry, resulting in smoother intake. The oblong shape combines the uniform stress of a circular hole with the large effective area of ​​a rectangular hole. Its rounded ends smooth the airflow and reduce turbulence, while the straight middle edge provides a concentrated effective ventilation area. This shape ensures sufficient intake area while maintaining a higher airflow velocity at the opening, enhancing the "capture" of initial cooking fumes. Furthermore, the smooth edges of the oblong hole without sharp corners make it easier to wipe away surface grease, or, under the combined effect of internal airflow and surface condensation, guide the grease downwards along the vertical hole wall, reducing the risk of grease clogging the ventilation hole 23 and helping to maintain its design performance over the long term. Furthermore, the oblong hole is a highly suitable hole type for stamping, offering high processing efficiency, long mold life, and ensuring dimensional consistency during mass production. This is crucial for ensuring the uniformity of air intake effect for each ventilation hole. A row of neat, uniform vertical oblong holes presents a visually orderly and precise technical aesthetic, enhancing the sense of detail and quality at the bottom of the product.

[0086] In the description herein, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0087] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A range hood of the side suction type, characterized in that, The side suction type range hood comprises a smoke collecting hood and a baffle assembly, the baffle assembly is installed in the trumpet-shaped opening of the smoke collecting hood through connecting pieces, at least one air inlet is formed between the peripheral edge of the baffle assembly and the inner wall of the smoke collecting hood, the effective air inlet area of the air inlet is S1, the area of the normal projection of the opening is the theoretical total air inlet area, the theoretical total air inlet area is S2, the ratio of S1 to S2 λ is in the range of 0.5<λ<0.

8.

2. The under-cabinet range hood according to claim 1, wherein One end of the connecting piece is connected to the inner wall of the smoke collecting hood, the other end of the connecting piece is connected to the inner surface of the baffle assembly, and the four connecting pieces are uniformly arranged at the four corner positions of the baffle assembly.

3. The sidewall-mounted range hood according to claim 1, wherein The baffle assembly is arranged obliquely relative to the smoke collecting hood, so that the inner diameters of the air inlets located on both sides of the baffle assembly gradually decrease from top to bottom. And / or, the upper end of the smoke collecting hood is provided with a forehead portion protruding forward; And / or, the two side edges of the smoke collecting hood are further provided with smoke blocking side plates, one side of the smoke blocking side plate is connected to the smoke collecting hood, and the other side of the smoke blocking side plate is arranged protruding forward.

4. The sidewall-mounted range hood according to claim 1, wherein The baffle assembly comprises a back plate and a panel, the back plate is installed on the smoke collecting hood through connecting pieces, and the panel is installed on the back plate through magnetic attraction components. Alternatively, the baffle assembly comprises a back plate and a panel, the back plate is installed on the smoke collecting hood through connecting pieces, and the panel is glass, which is bonded to the back plate.

5. The sidewall-mounted range hood according to claim 4, wherein The lower end of the back plate is provided with a limiting step, and the panel is clamped on the limiting step. And / or, the middle part of the smoke collecting hood is provided with a flow collecting hole communicated with the air inlet, and the position opposite to the flow collecting hole of the back plate is provided with a spherical convex which protrudes towards the direction of the flow collecting hole.

6. The sidewall-mounted range hood according to claim 1, wherein The middle part of the smoke collecting hood is provided with a flow collecting hole communicated with the air inlet, and the side suction type range hood further comprises a filter screen assembly, the filter screen assembly is installed on the smoke collecting hood, the filter screen assembly covers the flow collecting hole, the filter screen assembly comprises an oil separation screen and a noise reduction screen, and the oil separation screen is located upstream of the noise reduction screen.

7. The sidewall-mounted range hood according to claim 1, wherein The middle part of the smoke collecting hood is provided with a flow collecting hole communicated with the air inlet, and the inner wall of the smoke collecting hood is further provided with a secondary air inlet, the two sides of the flow collecting hole are provided with the secondary air inlets, and the side suction type range hood further comprises a fan, the fan is installed in the interior of the smoke collecting hood, and the secondary air inlets are communicated with the rear air inlets of the fan.

8. The under-cabinet range hood as claimed in claim 1, wherein The side suction type range hood further comprises an oil collecting box, the oil collecting box is detachably connected to the lower edge of the smoke collecting hood and located below the baffle assembly, the oil collecting box is arranged extending along the length direction of the baffle assembly, and the opening of the oil collecting box faces upward.

9. The sidewall-mounted range hood according to claim 8, wherein The lower end of the baffle assembly is provided with a plurality of ventilation holes, a plurality of the ventilation holes are arranged along the length direction of the baffle assembly, and a plurality of the ventilation holes form an air inlet located at the lower end of the baffle assembly.

10. The under-cabinet range hood as claimed in claim 9, wherein The ventilation hole is a waist-shaped hole, and the waist-shaped hole is arranged vertically.

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