A type of range hood

Abstract

This application provides a range hood, which includes a fan, a smoke collection hood, and a smoke exhaust duct. The fan's air inlet is connected to the smoke collection hood, and the fan's air outlet is connected to the smoke exhaust duct. The fan's air outlet is provided with an air multiplier structure, and the fan's air outlet is connected to the smoke exhaust duct through the air multiplier structure. The air multiplier structure includes an inner ring guide structure and an outer ring guide structure. The outer ring guide structure is arranged around the outer side wall of the inner ring guide structure, and an annular guide cavity is formed between the outer side wall of the inner guide structure and the inner side wall of the outer guide structure. The fan's air outlet is connected to the smoke exhaust duct through the annular guide cavity. This application provides a range hood that can increase airflow, expand the range of oil fume adsorption, and improve smoke extraction efficiency.

Description

Technical Field

[0001] This application relates to the field of range hood technology, specifically to a range hood with an air multiplication structure. Background Technology

[0002] Currently, range hoods have become an indispensable and important device for removing cooking fumes from kitchens in every household. However, after a period of use, traditional range hoods accumulate a large amount of oily residue on the motor and fan blades, reducing their efficiency and preventing the proper removal of fumes.

[0003] Therefore, it is particularly important to provide a range hood that can increase airflow, expand the range of oil fume adsorption, and improve smoke extraction efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this application proposes a range hood, which includes a fan, a smoke collection hood, and a smoke exhaust duct. The air inlet of the fan is connected to the smoke collection hood, and the air outlet of the fan is connected to the smoke exhaust duct. The air outlet of the fan is provided with an air multiplier structure, and the air outlet of the fan is connected to the smoke exhaust duct through the air multiplier structure.

[0005] The air multiplier structure includes an inner ring guide structure and an outer ring guide structure. The outer ring guide structure is arranged around the outer side wall of the inner ring guide structure. An annular guide cavity is formed between the outer side wall of the inner guide structure and the inner side wall of the outer guide structure. The air outlet of the fan is connected to the smoke exhaust channel through the annular guide cavity.

[0006] In an optional embodiment, the diameter of the outer ring guide structure is half the diameter of the flue.

[0007] In an optional embodiment, a support structure is provided in the annular flow guiding cavity, and the support structure is uniformly distributed along the annular flow guiding cavity.

[0008] In an optional embodiment, the air outlet of the fan is further provided with a movable protrusion and a push rod motor. The movable protrusion is electrically connected to the push rod motor and is used to move up and down under the drive of the push rod motor to open or block the air outlet.

[0009] In an optional embodiment, the range hood further includes a motor connected to the fan for driving the fan to rotate;

[0010] The motor is a brushed DC motor with a power range of 50W-800W.

[0011] In an optional embodiment, the range hood further includes a display control panel and an embedded microcontroller. The display control panel is equipped with a sound acquisition device, and the embedded microcontroller is electrically connected to the motor and the sound acquisition device, respectively.

[0012] The sound acquisition device is used to acquire cooking sounds, and the embedded microcontroller is used to control the rotation speed of the fan through the motor based on the cooking sounds acquired by the embedded microcontroller.

[0013] In an optional embodiment, the sound acquisition device is a handset.

[0014] In an optional embodiment, the air inlet of the fan is provided with a filter.

[0015] In an optional embodiment, the filtering device is an air filter.

[0016] In an optional embodiment, a sound-absorbing device is provided inside the cavity of the fan.

[0017] This application provides a range hood that incorporates an air multiplication structure at the fan outlet. This air multiplication structure includes an inner ring guide structure and an outer ring guide structure, forming an annular guide cavity between the inner and outer ring guide structures. This air multiplication structure effectively increases the air volume drawn in by the range hood. The low-pressure zone generated by the annular airflow channel formed by the annular guide cavity enables synergistic adsorption of air multiplication, effectively expanding the range of oil fume adsorption and improving adsorption efficiency by more than 30% compared to traditional fans. Attached Figure Description

[0018] To more clearly illustrate the technical solutions and advantages in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the range hood provided in the embodiments of this application.

[0020] Figure 2 This is a cross-sectional schematic diagram of the air outlet of a fan provided in an embodiment of this application.

[0021] The corresponding reference numerals in the figure are:

[0022] 1-Fan, 2-Smoke hood, 3-Inner ring guide structure, 4-Outer ring guide structure, 5-Annular guide cavity, 6-Support structure, 7-Moving protrusion, 8-Push rod motor, 9-Display control panel, 10-Sound acquisition device, 11-Filter device. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of the embodiments of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented in orders other than those illustrated or described herein. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0025] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to an integer, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are included. For example, a specified range from “1 to 10” should be considered to include any and all subranges between the minimum value 1 and the maximum value 10. Exemplary subranges of the range 1 to 10 include, but are not limited to, 1 to 6.1, 3.5 to 7.8, 5.5 to 10, etc.

[0026] This application provides a range hood, such as... Figure 1As shown, the range hood includes a fan 1, a smoke collection hood 2, and a smoke exhaust duct. The air inlet of the fan 1 is connected to the smoke collection hood 2, and the air outlet of the fan 1 is connected to the smoke exhaust duct. The air outlet of the fan 1 is provided with an air multiplier structure, and the air outlet of the fan 1 is connected to the smoke exhaust duct through the air multiplier structure.

[0027] The air multiplier structure includes an inner ring guide structure 3 and an outer ring guide structure 4. The outer ring guide structure 4 is arranged around the outer side wall of the inner ring guide structure 3. An annular guide cavity 5 is formed between the outer side wall of the inner ring guide structure 3 and the inner side wall of the outer ring guide structure 4. The air outlet of the fan 1 is connected to the smoke exhaust channel through the annular guide cavity 5.

[0028] In this embodiment, the range hood includes at least a fan 1, a smoke collection hood 2, and an exhaust duct. The smoke collection hood 2 is located above the stove and covers the entire stove area, collecting the cooking fumes. A baffle or similar device may be installed inside the smoke collection hood 2 to guide the fumes towards the fan 1. The fan 1 is the device in the range hood that generates airflow, typically including blades, a casing, and other components. The fan 1 generates suction by rotating to draw in the fumes and exhaust them outdoors through the exhaust duct. When the range hood is working, the fumes are collected by the smoke collection hood 2, then enter the air inlet of the fan 1 through the air inlet pipe or baffle. The fan 1 generates suction to draw in the fumes, and then sends them out through the air outlet of the fan 1 into the exhaust duct for discharge.

[0029] In order to increase the air volume drawn in by the range hood and effectively expand the range of oil fume adsorption, this embodiment of the application provides an air multiplier structure at the air outlet of the fan 1, and the air outlet of the fan 1 is connected to the exhaust duct through the air multiplier structure.

[0030] Specifically, the air multiplier structure includes an inner ring guide structure 3 and an outer ring guide structure 4, both of which are annular. The inner ring guide structure 3 and the outer ring guide structure 4 are fixedly connected, and the outer ring guide structure 4 is arranged around the outer sidewall of the inner ring guide structure 3. An annular guide cavity 5 is formed between the outer sidewall of the inner ring guide structure 3 and the inner sidewall of the outer ring guide structure 4. The air outlet of the fan 1 is connected to the smoke exhaust channel through the annular guide cavity 5.

[0031] Since the air multiplier structure is located at the air outlet of the fan 1, and the air multiplier structure includes an inner ring guide structure 3 and an outer ring guide structure 4, when fixing the inner ring guide structure 3 and the outer ring guide structure 4, the side of the inner ring guide structure 3 and the outer ring guide structure 4 closest to the air outlet of the fan 1 can be fixedly connected to the air outlet of the fan 1. This causes the air blown out of the air outlet of the fan 1 to flow along the annular guide cavity 5 with a curved surface, thereby forming the Coanda effect, also known as the wall attachment effect, and flowing out from the outlet side of the inner ring guide structure 3 and the outer ring guide structure 4 away from the air outlet of the fan 1. In addition, since the air blown out of the air outlet of the fan 1 enters the annular guide cavity 5 formed between the outer wall of the inner ring guide structure 3 and the inner wall of the outer ring guide structure 4, the annular guide cavity 5 can be considered as a narrow channel. When the fluid enters this narrow channel, the flow velocity increases and the pressure decreases, thereby enhancing the suction and producing the Venturi effect. The embodiments of this application can effectively increase the air volume drawn in by the range hood through the Coanda effect and Venturi effect. The low-pressure zone generated by the annular airflow channel formed by the annular guide cavity 5 can achieve air multiplication and synergistic adsorption, effectively expanding the range of oil fume adsorption. Compared with the traditional fan 1, the adsorption efficiency is improved by more than 30%.

[0032] Figure 2 This is a cross-sectional schematic diagram of an air outlet provided in an embodiment of this application, such as... Figure 2 As shown, both the inner ring guide structure 3 and the outer ring guide structure 4 have circular cross-sectional shapes. Since the annular guide cavity 5 is connected to the exhaust channel, in order to effectively increase the air volume drawn in by the range hood, achieve multiplied synergistic adsorption of air, and effectively expand the range of oil fume adsorption, the diameter of the outer ring guide structure 4 can be set to half the diameter of the exhaust channel. For example, the diameter of the outer ring guide structure 4 can be 3000 mm.

[0033] It should be noted that, since the oil fumes in this embodiment flow within the annular guide cavity 5 between the inner ring guide structure 3 and the outer ring guide structure 4, and not within the inner ring guide cavity itself, the diameter of the inner ring guide structure 3 is not limited in this embodiment. It can be limited based on the actual size of the air outlet of the fan 1. Similarly, the axial lengths of the inner ring guide structure 3 and the outer ring guide structure 4 are not limited in this embodiment. They can be limited based on the actual size of the air outlet of the fan 1, as long as they can be stably connected to the air outlet of the fan 1.

[0034] Continue as Figure 2As shown, due to the fixed connection between the inner ring guide structure 3 and the outer ring guide structure 4, in order to improve the fixing effect of the inner ring guide structure 3 and the outer ring guide structure 4 and ensure the smooth realization of air multiplication synergistic adsorption, a support structure 6 can be set in the annular guide cavity 5. The support structure 6 is fixedly connected to the outer side wall of the inner ring guide structure 3 and the inner side of the outer ring guide structure 4, and is evenly distributed along the annular guide cavity 5, that is, evenly distributed along the outer side wall of the inner ring guide structure 3 and the inner side wall of the outer ring guide structure 4. This application embodiment does not limit the number of support structures 6. Optionally, in order to avoid the influence of the presence of support structures 6 on air multiplication synergistic adsorption, fewer support structures 6 can be set.

[0035] In other embodiments, in order to further increase the air volume drawn in by the range hood and expand the range of oil fume adsorption, the cross-sections of the inner ring guide structure 3 and the outer ring guide structure 4 can be set to a wave shape, thereby forming a wave-shaped guide cavity between the outer side wall of the inner ring guide structure 3 and the inner side wall of the outer ring guide structure 4.

[0036] In other embodiments, in order to further increase the air volume drawn in by the range hood and expand the range of oil fume adsorption, a guide structure can be provided on the outer side wall of the inner ring guide structure 3 and the inner side wall of the outer ring guide structure 4. The air volume drawn in by the range hood can be further increased and the range of oil fume adsorption can be expanded through the guide structure.

[0037] In an optional embodiment, continue as follows Figure 1 As shown, the air outlet of the fan 1 is also provided with a movable protrusion 7 and a push rod motor 8. The movable protrusion 7 is movably connected to the air outlet of the fan 1, and the movable protrusion 7 is electrically connected to the push rod motor 8. The push rod motor 8 is used to control the up and down movement of the movable protrusion 7. When the range hood is turned on, the push rod motor 8 moves upward, driving the movable protrusion 7 to move upward, and the air outlet of the fan 1 opens. When the range hood is turned off, the push rod motor 8 moves downward, driving the movable protrusion 7 to move downward, thereby blocking the air outlet of the fan 1. In this way, the oil and water on the inner wall of the flue will not flow into the cavity of the fan 1, but will eventually flow into the oil cup, thus ensuring the cleanliness of the cavity of the fan 1.

[0038] It should be noted that the embodiments of this application do not limit the connection method between the movable protrusion 7 and the push rod motor 8, as long as it can ensure that the push rod motor 8 can control the up and down movement of the movable protrusion 7. The embodiments of this application also do not limit the movable connection method between the movable protrusion 7 and the air outlet, and it can adopt any movable connection method, as long as it can realize the function of the movable protrusion 7 opening or blocking the air outlet.

[0039] Alternatively, the push rod motor 8 can be a stepper motor or a DC motor.

[0040] In an optional embodiment, continue as follows Figure 1 As shown, to prevent oil fumes from directly contacting the motor, the air inlet of the fan 1 is equipped with a filter device 11, thereby ensuring the cleanliness of the fan 1 cavity. For example, the filter device 11 can be an air filter element, which effectively filters particulate matter and oil stains from the air, preventing these impurities from entering the motor or fan 1 and causing wear or blockage. In addition, the air filter element may also help reduce noise and make the filtered airflow smoother. Furthermore, to ensure the cleanliness of the fan 1 cavity, the filter device 11 can be replaced periodically.

[0041] It should be noted that the shape and size of the filter device 11 are not limited in the embodiments of this application, and can be set according to the size of the air inlet of the fan 1.

[0042] Furthermore, to reduce noise during range hood operation and improve the user experience, this embodiment of the application may also include a sound-absorbing device within the cavity of the fan 1. This application does not limit the location of the sound-absorbing device within the cavity of the fan 1, nor does it limit the type of sound-absorbing device. Optionally, the sound-absorbing device may be sound-absorbing cotton.

[0043] In an optional embodiment, the range hood in this application embodiment further includes a motor connected to the fan 1 to drive the fan 1 to rotate, i.e., the motor drives the fan 1 to work together to complete the function of fume extraction. To ensure the normal operation of the fan 1, thereby effectively increasing the air volume drawn in by the range hood, achieving multiplied air adsorption, effectively expanding the fume adsorption range, and meeting different daily cooking needs, the motor in this application embodiment is a brushed DC motor with a power range of 50W-800W.

[0044] In an optional embodiment, the range hood further includes a display control panel 9 and an embedded microcontroller. The display control panel 9 is equipped with a sound acquisition device 10, and the embedded microcontroller is electrically connected to the motor and the sound acquisition device 10 respectively.

[0045] The sound acquisition device 10 is used to acquire cooking sounds, and the embedded microcontroller is used to control the rotation speed of the fan 1 through the motor based on the cooking sounds acquired by the embedded microcontroller.

[0046] This application embodiment can also collect cooking sounds, identify the cooking scene based on the cooking sounds, and adjust the fan volume according to the cooking scene and the volume of the cooking sounds to achieve the effect of preventing smoke from escaping and saving energy. To achieve this function, the range hood of this application embodiment also includes a display control panel 9 and an embedded microcontroller. This application embodiment does not limit the placement of the display control panel 9 and the embedded microcontroller on the range hood. For example, the display control panel 9 can be integrated into the top cover or upper edge of the range hood, integrated into the sides of the range hood, integrated into the front of the range hood, etc., and the embedded microcontroller can be integrated into the interior of the range hood body. The display control panel 9 is provided with a sound acquisition device 10, which is used to collect cooking sounds. The embedded microcontroller is electrically connected to the sound acquisition device 10 and is used to receive cooking sounds, analyze the cooking sounds, identify the cooking scene, and then determine the volume of the cooking sounds. Based on the volume of the cooking sounds, the microcontroller controls the motor driver program to control the rotation speed of the fan 1, thereby achieving airflow control.

[0047] This application does not limit the type of the sound acquisition device 10. For example, the sound acquisition device 10 can be a handset. Because handsets are convenient and highly sensitive, using a handset to acquire cooking sounds can improve the accuracy and sensitivity of cooking sound acquisition.

[0048] The following is a detailed explanation of the process of "collecting cooking sounds, identifying the cooking scene based on the cooking sounds, and adjusting the fan's airflow according to the cooking scene and the volume of the cooking sounds":

[0049] 1) Collect sound curves for different cooking scenarios, determine the fan air volume corresponding to the sound curves for different cooking scenarios based on a large number of experiments, fit the sound curves for different cooking scenarios and the corresponding fan air volume to obtain the fitting curve between cooking sound and air volume for different cooking scenarios.

[0050] 2) When the range hood is turned on, the push rod motor 8 moves upward, the air outlet of the fan 1 opens, and the range hood operates according to the specified mode. If the range hood is in the automatic air volume adjustment mode, the sound in the kitchen is collected by the sound collection device 10, and the cooking sound is obtained by using an algorithm to retain only the sound pattern of cooking.

[0051] 3) Identify cooking scenarios based on cooking sounds. These scenarios may include, but are not limited to, steaming, stewing, boiling, and frying. Specifically, the cooking sounds can be compared with sounds in a preset sound library to determine the cooking scenario. If the sound is loud and lasts for a long time, the cooking scenario can be identified as boiling or frying. If the sound is medium and lasts for a long time, the cooking scenario can be identified as stewing or boiling. If the sound is soft and lasts for a long time, the cooking scenario can be identified as steaming or braising.

[0052] 4) Determine the volume of cooking noise, and obtain the fitting curve between cooking noise and airflow corresponding to different cooking scenarios from the fitting curve between cooking noise and airflow.

[0053] 5) From the fitted curve between cooking sound and airflow corresponding to the cooking scenario, the target airflow corresponding to the cooking sound is obtained. The embedded microcontroller controls the rotation speed of the fan 1 through the motor, thereby enabling the airflow to reach the target airflow. At the same time, by utilizing air multiplication technology, both smoke-free operation and energy-saving effects are achieved.

[0054] 6) When the range hood is turned off, the push rod motor 8 moves downward, blocking the air outlet of the fan 1 cavity. The oil and water on the inner wall of the exhaust duct will not flow into the fan 1 cavity, but will eventually flow into the oil cup.

[0055] In an optional embodiment, the range hood can also be connected to the user's terminal application via wired or wireless means. When the filter device 11 reaches its replacement time, both the user's terminal application and the display control panel 9 of the range hood will prompt the user with a replacement reminder message for the filter device 11.

[0056] The range hood provided in this application has the following beneficial effects:

[0057] 1. Large air volume and enhanced air adsorption: The low-pressure zone generated by the annular airflow channel formed by the annular guide cavity can expand the range of oil fume adsorption, improving the adsorption efficiency by more than 30% compared with traditional fans.

[0058] 2. The oil circuit is simple, and the oil on the inner wall of the range hood will not flow into the fan cavity, ensuring the cleanliness of the fan cavity.

[0059] 3. The range hood's structure only has an air multiplication structure at the air outlet, which can achieve the effect of air multiplication and synergistic adsorption. The structure is simple, easy to clean, and relatively easy to maintain.

[0060] 4. It has good working stability and is not prone to aging. The fan is relatively stable and has a filter device at the air inlet, which prevents direct contact with cooking fumes, avoiding the risk of corrosion and blockage. The fan can be used for a long time.

[0061] 5. Fast response time: It uses cooking sounds as a signal to control the airflow of the range hood, achieving the effect of preventing smoke from escaping and saving energy.

[0062] 6. Sound-absorbing cotton is added to the fan cavity to effectively reduce noise.

[0063] 7. Both the user's terminal application and the range hood's display control panel can send a reminder message to the user when it is time to replace the filter.

[0064] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A range hood, comprising a fan (1), a fume collecting hood (2) and a fume discharge duct, an air inlet of the fan (1) being communicated with the fume collecting hood (2), and an air outlet of the fan (1) being communicated with the fume discharge duct, characterized in that, The air outlet of the fan (1) is provided with an air multiplier structure, and the air outlet of the fan (1) is connected to the flue through the air multiplier structure. The air multiplier structure includes an inner ring guide structure (3) and an outer ring guide structure (4). The outer ring guide structure (4) is arranged around the outer side wall of the inner ring guide structure (3). An annular guide cavity (5) is formed between the outer side wall of the inner ring guide structure (3) and the inner side wall of the outer ring guide structure (4). The air outlet of the fan (1) is connected to the flue through the annular guide cavity (5).

2. The range hood according to claim 1, characterized in that The diameter of the outer ring guide structure (4) is half the diameter of the exhaust duct.

3. The range hood according to claim 1, characterized in that A support structure (6) is provided in the annular flow guide cavity (5), and the support structure (6) is evenly distributed along the annular flow guide cavity (5).

4. The range hood according to claim 1, characterized in that The air outlet of the fan (1) is also provided with a movable protrusion (7) and a push rod motor (8). The movable protrusion (7) is electrically connected to the push rod motor (8). The movable protrusion (7) is used to move up and down under the drive of the push rod motor (8) to open or block the air outlet.

5. The range hood according to any one of claims 1 to 4, characterized in that, The range hood also includes a motor, which is connected to the fan (1) and is used to drive the fan (1) to rotate; The motor is a brushed DC motor with a power range of 50W-800W.

6. The range hood according to claim 5, characterized in that, The range hood also includes a display control panel (9) and an embedded microcontroller. The display control panel (9) is equipped with a sound acquisition device (10). The embedded microcontroller is electrically connected to the motor and the sound acquisition device (10) respectively. The sound acquisition device (10) is used to acquire cooking sounds, and the embedded microcontroller is used to control the rotation speed of the fan (1) through the motor based on the cooking sounds acquired by the embedded microcontroller.

7. The range hood according to claim 6, characterized in that, The sound acquisition device (10) is a receiver.

8. The range hood according to any one of claims 1 to 4, characterized in that, The air inlet of the fan (1) is equipped with a filter device (11).

9. The range hood according to claim 8, characterized in that, The filtration device (11) is an air filter.

10. The range hood according to any one of claims 1 to 4, characterized in that, The blower (1) is equipped with a sound-absorbing device inside its cavity.

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