Range hood

Abstract

A range hood comprises an upper box body and a smoke collecting hood, smoke baffles are installed on the left side and the right side of the smoke collecting hood, lower air guide channels are formed in the inner side walls of the smoke baffles, upper air guide channels corresponding to the lower air guide channels are formed in the smoke collecting hood, the upper air guide channels and the lower air guide channels can move synchronously under driving of a driving mechanism, and when the smoke baffles are in a closed state, the upper air guide channels and the lower air guide channels can move synchronously. When the smoke baffle is opened, the smoke baffle and the lower air guide channel are turned upwards to the bottom of the smoke collecting hood, the upper air guide channel is hidden above the smoke baffle, when the smoke baffle is opened, the smoke baffle and the lower air guide channel are turned downwards to the position below the smoke collecting hood, and the upper air guide channel is turned upwards to be in fluid communication with the lower air guide channel. When the range hood is turned off, the upper air guide channel and the lower air guide channel are hidden on the back side of the smoke baffle, when the range hood is turned on, the upper air guide channel and the lower air guide channel are in fluid communication, a negative pressure area is formed on the inner side wall of the smoke baffle, and if oil smoke escapes at the edge of the smoke baffle, the oil smoke can be sucked into the upper box body after passing through the lower air guide channel and the upper air guide channel; the oil smoke suction effect is improved.

Description

A type of range hood Technical Field

[0001] This invention relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] In the cooking process, the effective removal of cooking fumes is crucial for ensuring a clean kitchen environment and reducing the health hazards of these fumes. As a widely used kitchen appliance, the effectiveness of top-mounted range hoods directly impacts the user experience and kitchen air quality. However, existing top-mounted range hoods still have several technical limitations in practical use. One significant factor affecting fume extraction efficiency is the interference of crosswinds. Natural convection in the kitchen, outdoor airflow from open doors and windows, and airflow generated by other electrical appliances all create crosswinds. When these crosswinds act on the rising fumes, they alter the flow trajectory of the fumes, causing some to deviate from the range hood's intake and fail to be drawn in promptly, thus spreading the fumes and polluting the kitchen environment.

[0003] On the other hand, existing top-mounted range hoods have a relatively limited suction area, relying mainly on the upper smoke inlet for extraction, making it difficult to create a comprehensive enclosure for cooking fumes. When a user is working in front of the cookware, there is no effective enclosed space between the user, the range hood, and the wall, allowing fumes to easily escape from the sides or front of the intake as they rise. Especially when the amount and speed of fumes generated during cooking are high, some fumes will bypass the range hood's suction range and spread to other areas of the kitchen, increasing cleaning difficulty and causing users to inhale unexhausted fumes, harming their health. Traditional top-mounted range hoods have a relatively fixed suction path, relying mainly on the negative pressure generated by the fan system for extraction. When fumes escape from the edges of the intake due to various factors, they cannot be captured and sucked in in time, further reducing the overall effectiveness of fume extraction. Existing structures lack effective remedial measures for fumes escaping to the edges of the range hood. For example, Chinese utility model patent No. 201620245138.2 (authorization number CN 205560911 U) discloses a range hood. This range hood uses arc-shaped movable smoke baffles installed on the left and right sides inside the smoke collection hood. When not in use, the smoke baffles retract into the smoke collection hood, and when in use, the smoke baffles extend outside the smoke collection hood. Although this structure expands the effective distance of the negative pressure zone in the left and right cavities of the smoke collection hood and can reduce the chance of rising fumes escaping from the sides of the smoke collection hood, once the fumes escape from the sides, they cannot be drawn back in, and the smoke extraction effect needs to be further improved. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a range hood in view of the above-mentioned existing technology, wherein the smoke baffle can extend downward when the machine is turned on and form an air curtain inside the smoke collection hood.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a range hood, comprising an upper housing and a smoke collection hood installed at the bottom of the upper housing, wherein smoke baffles are installed on the left and right sides of the smoke collection hood, characterized in that: a lower air guide channel is provided on the inner side wall of the smoke baffle, and an upper air guide channel corresponding to the lower air guide channel is provided inside the smoke collection hood; under the drive of the drive mechanism, the upper air guide channel and the lower air guide channel can move synchronously; in the closed state of the smoke baffle, the smoke baffle and the lower air guide channel flip upward to the bottom of the smoke collection hood, and the upper air guide channel is hidden above the smoke baffle; in the open state of the smoke baffle, the smoke baffle and the lower air guide channel flip downward to the bottom of the smoke collection hood, and the upper air guide channel flips upward to be in fluid communication with the lower air guide channel.

[0006] In order to smoothly draw the oil fumes escaping from the edge of the smoke baffle into the upper housing, the lower air guide channel is in a vertical position when the smoke baffle is open, and the upper air guide channel is arranged obliquely outward from top to bottom. The outlet of the lower air guide channel faces the inlet of the upper air guide channel, and the outlet of the upper air guide channel faces the interior of the upper housing.

[0007] Further preferably, the lower air guide duct has a first air guide opening at its outlet, and the upper air guide duct has a second air guide opening at its inlet. When the smoke baffle is open, the second air guide opening is positioned opposite to the first air guide opening. This arrangement allows the fumes entering the lower air guide duct to smoothly enter the upper air guide duct, reducing the escape of fumes.

[0008] Further preferably, the outlet of the upper air guide channel has a flared upper air guide outlet.

[0009] In order to allow the fumes to enter the lower air guide channel smoothly, an air inlet is opened on the side wall of the lower air guide channel.

[0010] The smoke baffle can have multiple opening and closing angles. Preferably, when the smoke baffle is open, it is in a vertical position. When the smoke baffle is closed, it is flipped upward to a horizontal position and the two smoke baffles on both sides are aligned.

[0011] In a further preferred embodiment, when the smoke baffle is closed, the upper air guide channel is entirely located inside the smoke collection hood; when the smoke baffle is open, the main body of the upper air guide channel is located inside the smoke collection hood, and the outlet of the upper air guide channel is located inside the upper housing.

[0012] The drive mechanism can have various structures. Preferably, the drive mechanism includes a motor, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, and a fixed plate. The first end of the first connecting rod is mounted on the output shaft of the motor. The first end of the second connecting rod is rotatably connected to the second end of the first connecting rod. The second end of the second connecting rod is rotatably connected to the first end of the third connecting rod. The second end of the third connecting rod is rotatably connected to the first end of the fourth connecting rod. The second end of the fourth connecting rod is rotatably connected to a smoke baffle bracket. The smoke baffle is mounted on a corresponding side of the smoke baffle bracket. The fixed plate is mounted on a smoke collection hood. The first end of the third connecting rod is also rotatably connected to the fixed plate. The upper air guide channel is rotatably connected to the middle of the third connecting rod. With this configuration, under the drive of the motor, the smoke baffle can be opened and closed through the transmission of each connecting rod, and the upper air guide channel and the lower air guide channel can be linked.

[0013] The motor can have various mounting structures. Preferably, the drive mechanism further includes a motor mounting bracket, which is mounted on the smoke collection hood.

[0014] As a preferred embodiment of any of the above solutions, a fan system is installed inside the upper housing. This configuration allows the fumes exhausted from the upper air duct to be smoothly drawn into the fan system, improving the fume extraction efficiency.

[0015] Compared with existing designs, the advantages of this invention are as follows: the range hood has a lower air guide channel on the inner wall of the smoke baffle, and an upper air guide channel corresponding to the lower air guide channel is provided inside the smoke collection hood. The upper and lower air guide channels can move synchronously. When the machine is off, the upper and lower air guide channels are hidden on the back side of the smoke baffle. When the machine is on, the upper and lower air guide channels are fluidly connected, and a negative pressure zone is formed at the inner wall of the smoke baffle. The Coanda effect is used locally to guide the airflow. If there is oil smoke escaping from the edge of the smoke baffle, it can be sucked into the upper housing through the lower and upper air guide channels, thereby improving the oil smoke extraction effect. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of the range hood according to an embodiment of the present invention (off state);

[0017] Figure 2 is a schematic diagram of the internal structure of the range hood shown in Figure 1;

[0018] Figure 3 is a schematic diagram of the range hood shown in Figure 1 after removing the upper box and the smoke collection hood;

[0019] Figure 4 is a schematic diagram of the structure of the range hood according to an embodiment of the present invention (powered on);

[0020] Figure 5 is a schematic diagram of the internal structure of the range hood shown in Figure 4;

[0021] Figure 6 is a schematic diagram of the range hood shown in Figure 4 after removing the upper box and the smoke collection hood;

[0022] Figure 7 is a structural schematic diagram of the structure shown in Figure 6 from another angle. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] As shown in Figures 1 to 6, the range hood in this embodiment is a top-mounted range hood, including an upper housing 1 and a smoke collection hood 2. A fan system (not shown) is installed inside the upper housing 1, and the smoke collection hood 2 is installed at the bottom of the upper housing 1. Smoke baffles 3 are installed on the left and right sides of the smoke collection hood 2, and a smoke baffle bracket 31 is fixed to the back of the smoke baffle 3. A lower air guide channel 4 is provided on the inner wall of the smoke baffle 3, and an upper air guide channel 5 corresponding to the lower air guide channel 4 is provided inside the smoke collection hood 2. Under the drive of the drive mechanism 6, the upper air guide channel 5 and the lower air guide channel 4 can move synchronously.

[0025] As shown in Figures 1 to 3, when the machine is turned off, the smoke baffle 3 is closed, and the smoke baffle 3 and the lower air guide channel 4 are flipped upward to the bottom of the smoke collection hood 2. The smoke baffle 3 is in a horizontal position and the smoke baffles 3 on both sides are aligned. At this time, the upper air guide channel 5 is hidden above the smoke baffle 3 and is set inside the smoke collection hood 2. The upper air guide channel 5 and the lower air guide channel 4 are hidden on the back side of the smoke baffle 3. The bottom of the range hood is flush with the bottom, which is aesthetically pleasing.

[0026] As shown in Figures 4 to 6, when the machine is turned on, the smoke baffle 3 opens, and the smoke baffle 3 and the lower air guide channel 4 flip downwards to below the smoke collection hood 2. The smoke baffle 3 and the lower air guide channel 4 are in a vertical position. The upper air guide channel 5 flips upwards and is arranged obliquely outwards from top to bottom, communicating fluidly with the lower air guide channel 4. The main body of the upper air guide channel 5 is located inside the smoke collection hood 2, and the outlet of the upper air guide channel 5 is located inside the upper housing 1. At this time, a negative pressure zone is formed on the inner wall of the smoke baffle 3, which locally utilizes the Coanda effect to guide the airflow. If there is oil fume escaping from the edge of the smoke baffle 3, it can be drawn into the upper housing 1 through the lower air guide channel 4 and the upper air guide channel 5, and then discharged outwards through the fan system.

[0027] The lower air guide duct 4 has an air inlet 42 on its side wall, and a first air guide port 41 at its outlet. The upper air guide duct 5 has a second air guide port 51 at its inlet. When the smoke baffle 3 is open, the outlet of the lower air guide duct 4 faces the inlet of the upper air guide duct 5, meaning the second air guide port 51 is positioned opposite the first air guide port 41, allowing the oil fume airflow discharged from the outlet of the lower air guide duct 4 to smoothly enter the upper air guide duct 5. Additionally, the upper air guide duct 5 has a flared upper air guide outlet 52. When the unit is running, the upper air guide outlet 52 faces the interior of the upper housing 1, allowing the oil fume airflow within the upper air guide duct 5 to smoothly enter the fan system through the upper air guide outlet 52.

[0028] The drive mechanism 6 in this embodiment includes a motor 60, a first connecting rod 61, a second connecting rod 62, a third connecting rod 63, a fourth connecting rod 64, a fixed plate 65, and a motor mounting bracket 66. The motor mounting bracket 66 is mounted on the smoke hood 2, and the motor 60 is mounted on the motor mounting bracket 66. The first end of the first connecting rod 61 is mounted on the output shaft of the motor 60. The first end of the second connecting rod 62 is rotatably connected to the second end of the first connecting rod 61. The second end of the second connecting rod 62 is rotatably connected to the first end of the third connecting rod 63. The second end of the third connecting rod 63 is rotatably connected to the first end of the fourth connecting rod 64. The second end of the fourth connecting rod 64 is rotatably connected to the smoke baffle bracket 31. The smoke baffle 3 is mounted on the corresponding side of the smoke baffle bracket 31. The fixed plate 65 is mounted on the smoke hood 2, and the first end of the third connecting rod 63 is also rotatably connected to the fixed plate 65. In addition, as shown in FIG7, the upper air guide channel 5 is rotatably connected to the middle part of the third connecting rod 63 via a rotating shaft 7. Driven by motor 60, the smoke baffles 3 on both sides of the smoke hood 2 can be synchronously rotated through the transmission of the first link 61, the second link 62, the third link 63 and the fourth link 64. The smoke baffles 3 on both sides are driven by the same drive mechanism, making the movement more stable. Furthermore, the upper air guide channel 5 also rotates synchronously under the drive of the third link 63.

[0029] This range hood can be controlled by a voice module, which is equipped with a control module, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the range hood to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

[0030] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts, collectively referred to as the first part and the second part, meaning that a fluid, gas, liquid, or a mixture of both can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber that allows fluid to flow through, or a combination of the above.

[0031] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A range hood, comprising an upper housing (1) and a smoke collection hood (2) installed at the bottom of the upper housing (1), wherein smoke baffles (3) are installed on the left and right sides of the smoke collection hood (2), characterized in that: The inner wall of the smoke baffle (3) is provided with a lower air guide channel (4), and the interior of the smoke hood (2) is provided with an upper air guide channel (5) corresponding to the lower air guide channel (4). Under the drive of the drive mechanism (6), the upper air guide channel (5) and the lower air guide channel (4) can move synchronously. When the smoke baffle (3) is closed, the smoke baffle (3) and the lower air guide channel (4) flip upward to the bottom of the smoke hood (2), and the upper air guide channel (5) is hidden above the smoke baffle (3). When the smoke baffle (3) is open, the smoke baffle (3) and the lower air guide channel (4) flip downward to the bottom of the smoke hood (2), and the upper air guide channel (5) flips upward to be in fluid communication with the lower air guide channel (4).

2. The range hood according to claim 1, characterized in that: With the smoke baffle (3) open, the lower air guide channel (4) is in a vertical position, and the upper air guide channel (5) is arranged obliquely outward from top to bottom. The outlet of the lower air guide channel (4) faces the inlet of the upper air guide channel (5), and the outlet of the upper air guide channel (5) faces the interior of the upper housing (1).

3. The range hood according to claim 2, characterized in that: The lower air guide channel (4) has a first air guide port (41) at its outlet, and the upper air guide channel (5) has a second air guide port (51) at its inlet. When the smoke baffle (3) is open, the second air guide port (51) is positioned opposite to the first air guide port (41).

4. The range hood according to claim 2, characterized in that: The outlet of the upper air guide channel (5) has a flared upper air guide outlet (52).

5. The range hood according to claim 1, characterized in that: An air inlet (42) is provided on the side wall of the lower air guide channel (4).

6. The range hood according to claim 1, characterized in that: When the smoke baffle (3) is open, the smoke baffle (3) is in a vertical position. When the smoke baffle (3) is closed, the smoke baffle (3) is flipped upward to a horizontal position and the smoke baffles (3) on both sides are aligned.

7. The range hood according to claim 1, characterized in that: When the smoke baffle (3) is closed, the upper air guide channel (5) is entirely located inside the smoke hood (2). When the smoke baffle (3) is open, the main body of the upper air guide channel (5) is located inside the smoke hood (2), and the outlet of the upper air guide channel (5) is located inside the upper housing (1).

8. The range hood according to claim 1, characterized in that: The drive mechanism (6) includes a motor (60), a first connecting rod (61), a second connecting rod (62), a third connecting rod (63), a fourth connecting rod (64), and a fixed plate (65). The first end of the first connecting rod (61) is mounted on the output shaft of the motor (60). The first end of the second connecting rod (62) is rotatably connected to the second end of the first connecting rod (61). The second end of the second connecting rod (62) is rotatably connected to the first end of the third connecting rod (63). The second end of the third connecting rod (63) is rotatably connected to the first end of the fourth connecting rod (64). The second end of the fourth connecting rod (64) is rotatably connected to the smoke baffle bracket (31). The smoke baffle (3) is mounted on the smoke baffle bracket (31) on the corresponding side. The fixed plate (65) is mounted on the smoke collection hood (2). The first end of the third connecting rod (63) is also rotatably connected to the fixed plate (65). The upper air guide channel (5) is rotatably connected to the middle part of the third connecting rod (63).

9. The range hood according to claim 8, characterized in that: The drive mechanism (6) also includes a motor mounting bracket (66), which is mounted on the smoke collection hood (2).

10. The range hood according to any one of claims 1 to 9, characterized in that: A fan system is installed inside the upper housing (1).

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