Range hood

Abstract

The utility model relates to a range hood, which comprises a casing, an air inlet, an air outlet and an air outlet, wherein the front side of the casing is provided with an air inlet; the smoke barrier comprises a smoke barrier main body and an auxiliary extension plate which is arranged on the smoke barrier main body in a sliding mode in the width direction of the smoke barrier main body, and the auxiliary extension plate is driven by a second driving mechanism to move in the width direction of the smoke barrier main body so as to change the overall width size of the smoke barrier; the height sensor is used for detecting the height of a user; the oil smoke concentration sensor is used for detecting the oil smoke concentration; the controller is electrically connected with the height sensor, the oil smoke concentration sensor, the first driving mechanism and the second driving mechanism; the controller controls the first driving mechanism and the second driving mechanism to act according to a user height signal transmitted by the height sensor and an oil smoke concentration signal transmitted by the oil smoke concentration sensor, so that the smoke barrier is opened to a corresponding opening angle and adjusted to a corresponding width size.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. Traditional range hoods include top-mounted and bottom-mounted types. Top-mounted range hoods are more aesthetically pleasing, but their smoke inlets are high, limiting their smoke extraction efficiency. Compared to top-mounted range hoods, bottom-mounted range hoods have lower smoke inlets; however, due to their external shape and internal duct structure, current bottom-mounted range hoods cannot effectively reach the cooking fumes, significantly limiting their extraction efficiency. To improve smoke collection, fume purification systems often incorporate baffles at the air inlet. A wider baffle results in better smoke collection, but the size of the range hood, especially for flip-up baffles, must be compatible with the overall dimensions and air inlet. Widening the baffle requires lengthening the lower part of the hood and increasing the width of the smoke inlet, which can be difficult to meet design requirements.

[0003] To address the aforementioned technical problems, Chinese utility model patent application No. 202020066610.2 (authorization announcement No.: CN211822584U) discloses a range hood, including a housing and a fan system disposed within the housing. The lower part of the housing has a vertically extending smoke inlet chamber. A smoke inlet communicating with the smoke inlet chamber is opened on the front side wall of the lower part of the housing. A smoke baffle extending horizontally or obliquely forward is provided along the upper edge of the smoke inlet. An extension plate, capable of retracting and extending relative to the smoke baffle to change its width, is also located at the front position of the smoke baffle. When the smoke concentration is high, the extension plate extends to increase the width of the smoke baffle, thereby improving the smoke collection effect and thus the oil absorption effect. When the smoke concentration is low or when not in use, the extension plate can be retracted without affecting the overall size of the machine or the size design of the smoke inlet.

[0004] The range hood in the aforementioned patent application still has some shortcomings. Although the extension length of the baffle can be increased to reduce the problem of smoke escape under high oil fume concentration, its opening angle is also fixed. It does not take into account that an excessively long baffle will obstruct the user's view and give the user an overly oppressive feeling. Especially when the opening angle is too small, an excessively long baffle will reduce the user's experience when cooking.

[0005] Therefore, existing range hoods still need further improvement. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a range hood that can open the smoke baffle to a suitable opening angle and extension length according to the user's height, in light of the current state of the technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a range hood, comprising:

[0008] The casing has an air inlet on the front side;

[0009] A smoke baffle is provided at the air inlet of the housing and can rotate relative to the housing under the drive of the first drive mechanism to change the opening angle of the smoke baffle. The smoke baffle includes a smoke baffle body and an auxiliary extension plate that is slidably provided on the smoke baffle body along the width direction of the smoke baffle body. The auxiliary extension plate is driven by the second drive mechanism and can move along the width direction of the smoke baffle body to change the overall width dimension of the smoke baffle.

[0010] It also includes a height sensor for detecting the user's height, an oil fume concentration sensor for detecting the concentration of oil fumes, and a controller electrically connected to the height sensor, the oil fume concentration sensor, the first drive mechanism, and the second drive mechanism. The controller controls the first drive mechanism and the second drive mechanism to operate according to the user height signal transmitted by the height sensor and the oil fume concentration signal transmitted by the oil fume concentration sensor, thereby opening the smoke baffle to the corresponding opening angle and adjusting the smoke baffle to the corresponding width size.

[0011] Generally, height sensors can be visual recognition devices, infrared sensors, etc., and preferably, the height sensor is an infrared sensor.

[0012] To provide users with a better field of vision, the smoke baffle is positioned at the same height as the user's eyes when it is at different opening angles.

[0013] To ensure that the smoke baffle does not obstruct the user's view when it is in different opening angles, the lowest position of the smoke baffle is at the same height when it is in different opening angles.

[0014] As an improvement, the first drive mechanism includes a drive motor and a hinge motion mechanism that is connected to the drive motor in a transmission manner, and the power output end of the hinge motion mechanism is connected to the main body of the smoke plate.

[0015] To move the auxiliary extension plate relative to the main body of the tobacco plate, the second driving mechanism includes an electric push rod located on the back of the main body of the tobacco plate and a telescopic frame assembly capable of expanding and retracting along the width direction of the main body of the tobacco plate. One end of the telescopic frame assembly is fixed relative to the main body of the tobacco plate, and the other end is connected to the auxiliary extension plate. The electric push rod is driven by the telescopic frame assembly, thereby driving the telescopic frame assembly to extend and retract. It is conceivable that the second driving mechanism could also be a drive structure consisting of a drive motor and a lead screw and slider transmission mechanism, or it could be a method where the electric push rod directly pushes the auxiliary extension plate to move.

[0016] To reduce the volume occupied, when the smoke baffle is closed and the air inlet is closed, the auxiliary extension plate is completely retracted relative to the smoke baffle body.

[0017] As an improvement, the front sidewall of the housing is inclined backward from top to bottom, and the smoke baffle in the open state is inclined forward from top to bottom.

[0018] Compared with the prior art, the advantages of this utility model are as follows: The controller of the range hood can control the operation of the first drive mechanism and the second drive mechanism according to the user height signal transmitted by the height sensor and the oil fume concentration signal transmitted by the oil fume concentration sensor, thereby opening the smoke baffle to the corresponding opening angle and adjusting the smoke baffle to the corresponding width size. Thus, while meeting the needs of smoke collection, it ensures that users of different heights have sufficient cooking visibility, reduces the feeling of spatial oppression caused by the smoke baffle opening angle being too small or the smoke baffle extending too far, and improves the user experience. Attached Figure Description

[0019] Figure 1 This is a left view of the range hood according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the smoke baffle of the range hood in different opening angle states according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the back of the smoke baffle in an embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0024] Figures 1-3 This illustration shows a preferred embodiment of the range hood of the present invention. The range hood includes a housing 10 and a centrifugal fan disposed within the housing 10. A left-right extending air inlet 11 is provided on the front side wall of the housing 10, allowing external fumes to enter the fume hood through the air inlet 11. The centrifugal fan, located within the housing 10, generates negative pressure during operation, drawing external fumes into the housing 10 through the air inlet 11. An oil cup 13, elongated in shape extending left and right, is provided at the bottom of the housing 10 to collect oil stains flowing down from the housing 10. A smoke baffle 12, capable of rotating forward and backward relative to the main body of the housing 10, is also provided at the front of the housing 10. The smoke baffle 12 is connected to the air inlet 11 of the housing 10 via a first driving mechanism 21 (such as a hinge mechanism), specifically capable of rotating forward to open the air inlet 11 and rotating backward to block and close the air inlet 11. The hinge mechanism used to drive the smoke baffle 12 to deflect can be a conventional hinge mechanism in the prior art, which will not be described in detail here.

[0025] The front side wall of the casing 10 slopes backward from top to bottom, and the smoke baffle 12, when in the open state, slopes forward from top to bottom, thus achieving a better smoke collection effect and reducing the escape of oil fumes from the front.

[0026] The smoke baffle 12 in this embodiment includes a smoke baffle body 121 and an auxiliary extension plate 122 slidably disposed on the smoke baffle body 121 along its width direction. The auxiliary extension plate 122 is driven by a second drive mechanism and can move along the width direction of the smoke baffle body 121, thereby changing the overall width dimension of the smoke baffle 12. Specifically, the second drive mechanism includes an electric push rod 31 disposed on the back side of the smoke baffle body 121 and a telescopic frame assembly 32 capable of unfolding and retracting along the width direction of the smoke baffle body 121. One end of the telescopic frame assembly 32 is fixed relative to the smoke baffle body 121, and the other end is connected to the auxiliary extension plate 122. The main body of the electric push rod 31 can be hinged to the back side of the smoke baffle body 121, and the end of the telescopic rod of the electric push rod 31 is drivenly connected to the main body of the telescopic frame assembly 32, thereby driving the telescopic frame assembly 32 to perform telescopic movements.

[0027] The range hood in this embodiment also includes a height sensor for detecting the user's height, an oil fume concentration sensor for detecting the concentration of oil fumes, and a controller electrically connected to the height sensor (not shown), the oil fume concentration sensor (not shown), the first drive mechanism 21, and the second drive mechanism. Generally, the height sensor can be a visual recognition device, an infrared sensor, etc. In a preferred embodiment, an infrared sensor is used; after obtaining the user's height through the height sensor, the height position of their eyes is also basically determined.

[0028] The controller controls the first drive mechanism 21 and the second drive mechanism to operate based on the user height signal transmitted by the height sensor and the oil fume concentration signal transmitted by the oil fume concentration sensor, thereby opening the smoke baffle 12 to a corresponding opening angle and adjusting the smoke baffle 12 to a corresponding width. Generally speaking, the larger the opening angle of the smoke baffle 12 (that is, the angle formed by the intersection of the smoke baffle and the vertical direction), the larger the width of the smoke baffle 12 will be. See also Figure 2 To ensure that the smoke baffle 12 does not obstruct the user's view at different opening angles, the lowest position of the smoke baffle 12 remains at the same height regardless of the opening angle. Specifically, to provide the user with a better field of vision, the lowest position of the smoke baffle 12 is at the same height as the user's eyes at different opening angles.

[0029] The smoke baffle 12 can be divided into multiple positions between its initial opening angle and its maximum opening angle, with each opening angle having a corresponding extension length of the auxiliary extension plate 122. Specifically, during operation, a height sensor detects the height of the user's eyes from the ground and determines whether the smoke baffle 12 obstructs the user's view at the initial opening angle (the height of the lowest point of the smoke baffle 12 can be calculated based on the opening angle of the smoke baffle 12 relative to the vertical direction and the extension length of the auxiliary extension plate, and compared with the user's eye height). If the view is obstructed, the default opening angle is increased to ensure unobstructed vision. When the smoke sensor detects an increase in smoke concentration and the smoke baffle 12 can no longer block the smoke, the auxiliary extension plate 122 of the smoke baffle 12 begins to extend outward (multi-stage extension is possible) to improve smoke collection. Simultaneously, the smoke baffle 12 continues to open to the set angle to avoid obstructing the view, ensuring that the smoke baffle 12 can meet the smoke-blocking needs of users of different heights to the greatest extent possible.

[0030] When the smoke baffle 12 closes the air inlet 11, the auxiliary extension plate 122 of the smoke baffle 12 is completely retracted and hidden relative to the smoke baffle body 121, which can reduce the volume occupied by the smoke baffle 12.

[0031] The range hood controller can control the first drive mechanism 21 and the second drive mechanism to operate based on the user height signal transmitted by the height sensor and the oil fume concentration signal transmitted by the oil fume concentration sensor. This allows the smoke baffle 12 to open to the corresponding opening angle and adjust to the corresponding width. In this way, while meeting the needs of smoke collection, it ensures that users of different heights have sufficient cooking visibility, reduces the feeling of spatial oppression caused by the smoke baffle 12 opening angle being too small or the smoke baffle 12 extending too far, and improves the user experience.

Claims

1. A range hood, comprising: The casing (10) has an air inlet (11) on its front side; A smoke baffle (12) is provided at the air inlet (11) of the housing (10) and can rotate relative to the housing (10) under the drive of the first drive mechanism (21) to change the opening angle of the smoke baffle (12). The smoke baffle (12) includes a smoke baffle body (121) and an auxiliary extension plate (122) slidably provided on the smoke baffle body (121) along the width direction of the smoke baffle body (121). The auxiliary extension plate (122) is driven by the second drive mechanism and can move along the width direction of the smoke baffle body (121) to change the overall width dimension of the smoke baffle (12). The feature is that it also includes a height sensor for detecting the user's height, an oil fume concentration sensor for detecting the oil fume concentration, and a controller electrically connected to the height sensor, the oil fume concentration sensor, the first drive mechanism (21), and the second drive mechanism. The controller controls the first drive mechanism (21) and the second drive mechanism to operate according to the user height signal transmitted by the height sensor and the oil fume concentration signal transmitted by the oil fume concentration sensor, thereby opening the smoke baffle (12) to the corresponding opening angle and adjusting the smoke baffle (12) to the corresponding width dimension.

2. The range hood according to claim 1, characterized in that: The height sensor is an infrared sensor.

3. The range hood according to claim 1, characterized in that: When the smoke baffle (12) is in different open angle states, the lowest position of the smoke baffle (12) is at the same height as the user's eyes.

4. The range hood according to claim 3, characterized in that: The smoke baffle (12) is at the same height at its lowest position when it is in different opening angle states.

5. The range hood according to any one of claims 1 to 4, characterized in that: The first drive mechanism (21) includes a drive motor and a hinge motion mechanism that is connected to the drive motor in a transmission manner. The power output end of the hinge motion mechanism is connected to the smoke plate body (121).

6. The range hood according to any one of claims 1 to 4, characterized in that: The second driving mechanism includes an electric push rod (31) disposed on the back of the tobacco plate body (121) and a telescopic frame assembly (32) that can be extended and retracted along the width direction of the tobacco plate body (121). One end of the telescopic frame assembly (32) is fixed relative to the tobacco plate body (121), and the other end is connected to the auxiliary extension plate (122). The electric push rod (31) is driven to the telescopic frame assembly (32), thereby driving the telescopic frame assembly (32) to perform telescopic movements.

7. The range hood according to any one of claims 1 to 4, characterized in that: When the smoke baffle (12) closes the air inlet (11), the auxiliary extension plate (122) is completely retracted relative to the smoke baffle body (121).

8. The range hood according to any one of claims 1 to 4, characterized in that: The front sidewall of the housing (10) is inclined backward from top to bottom, and the smoke baffle (12) in the open state is inclined forward from top to bottom.

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