Active noise reduction device of a range hood

Abstract

This utility model relates to the field of range hood technology, and more particularly to an active noise reduction device for a range hood. The active noise reduction device includes a range hood body, a smoke extraction groove on the panel of the range hood body, and an installation groove on the outside of the smoke extraction groove. A fixedly connected mounting frame is installed on the mounting groove, and a smoke extraction frame is formed on the outer wall of the mounting frame, with the end cross-section of the smoke extraction frame being trumpet-shaped. The active noise reduction device for a range hood provided by this utility model, because the smoke extraction frame is located inside the smoke extraction groove on one side with a relatively large opening, utilizes Bernoulli's principle. When air flows from a relatively small opening to a relatively large opening, its airflow velocity decreases, thereby reducing the noise of the gas flow. Therefore, it can achieve active noise reduction for the range hood body.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to an active noise reduction device for range hoods. Background Technology

[0002] In recent years, due to rapid economic development and a gradual improvement in living standards, people's enthusiasm for cooking has been increasing. Furthermore, as urban planning expands, the demand for range hoods among urban residents has also grown. However, the noise of range hoods has always been a major headache in the home appliance industry.

[0003] The noise from a range hood mainly comes from the fan and airflow. The sound of airflow is primarily generated when air flows into the range hood through the smoke inlet. During this process, the noise increases when the air inlet is larger than the air outlet. Currently, most range hoods lack cleaning components at the smoke inlet, so when grease accumulates at the smoke inlet during later use, it easily forms a funnel-shaped structure where the inlet opening is larger than the outlet, thus increasing the noise of the range hood.

[0004] Therefore, it is necessary to provide a new active noise reduction device for range hoods to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an active noise reduction device for range hoods.

[0006] The active noise reduction device for a range hood provided by this utility model includes: a range hood body, a smoke extraction groove is provided on the panel of the range hood body, and an installation groove is provided on the outside of the smoke extraction groove on the panel of the range hood body.

[0007] A fixedly connected mounting frame is installed on the mounting slot. A smoking frame is provided on the outer wall of the mounting frame, and the end cross-section of the smoking frame is trumpet-shaped.

[0008] Preferably, a slidably connected scraper is inserted inside the smoking frame, and the outer wall of the scraper abuts against the inner wall of the smoking frame and the outer wall of the mounting frame.

[0009] Preferably, a handle is fixedly connected to the side of the scraper located outside the mounting frame, and a positioning magnetic block is fixedly connected to the outer wall of the scraper.

[0010] Preferably, fixed magnetic blocks are installed on both sides of the outer wall of the mounting frame, and the fixed magnetic blocks abut against and attract each other with the positioning magnetic blocks.

[0011] Preferably, the range hood body is provided with a fixedly connected mounting plate, and a fixedly connected rubber plate is adhered to the mounting plate.

[0012] Preferably, the side with the relatively larger opening of the smoking frame is located inside the smoking trough, and the side with the relatively smaller opening of the smoking frame is located inside the mounting frame.

[0013] Compared with related technologies, the active noise reduction device for range hoods provided by this utility model has the following beneficial effects:

[0014] 1. This utility model uses an inverted horn structure and a smoke frame. Since the smoke frame is located inside the smoke trough on one side with a relatively large opening, the airflow speed decreases when air flows from a relatively small opening to a relatively large opening, thus reducing the noise of the gas flow. Therefore, it can achieve active noise reduction of the range hood body.

[0015] 2. The present invention uses a scraper to scrape and clean the oil stains on the smoke frame, thereby reducing the accumulation of oil stains on the smoke frame. This prevents the opening of the smoke frame on the side inside the smoke slot from becoming smaller due to the accumulation of oil stains, which in turn increases the noise of the range hood when it is working.

[0016] 3. This utility model adds a rubber pad to the outer wall of the mounting plate. After the range hood body is installed on the wall, the rubber pad abuts against the wall, which can physically isolate the vibration generated by the range hood body when it is working, thereby helping to reduce the noise of the device when it is working. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of the active noise reduction device for a range hood provided by this utility model;

[0018] Figure 2 for Figure 1 The diagram shows the structure of the mounting frame and its components.

[0019] Figure 3 for Figure 2 The diagram shows the structure of the scraper.

[0020] Figure 4 for Figure 1 The diagram shows the structure of the range hood body.

[0021] The following are the labels in the diagram: 1. Range hood body; 11. Smoke extraction slot; 12. Mounting slot; 2. Mounting frame; 21. Smoke extraction frame; 22. Fixing magnet; 3. Mounting plate; 31. Rubber plate; 4. Scraper strip; 41. Handle; 42. Positioning magnet. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] Please see Figures 1 to 4 The present invention provides an active noise reduction device for a range hood, which includes: a range hood body 1.

[0025] In the embodiments of this utility model, please refer to Figures 1 to 4 The range hood body 1 has a smoke extraction groove 11 on its panel, and an installation groove 12 is provided on the outside of the smoke extraction groove 11 on the panel of the range hood body 1. A fixedly connected installation frame 2 is installed on the installation groove 12. A smoke extraction frame 21 is provided on the outer wall of the installation frame 2. The end section of the smoke extraction frame 21 is trumpet-shaped. The side with the relatively larger opening of the smoke extraction frame 21 is located in the smoke extraction groove 11, and the side with the relatively smaller opening of the smoke extraction frame 21 is located in the installation frame 2.

[0026] It should be noted that when the range hood is in operation, since the smoke frame 21 is located on one side of the smoke slot with a relatively large opening, the airflow speed decreases when air flows from the relatively small opening to the relatively large opening, which reduces the noise of the gas flow. Therefore, active noise reduction of the range hood body 1 can be achieved.

[0027] In the embodiments of this utility model, please refer to Figures 1 to 4 The smoking frame 21 is equipped with a slidably connected scraper 4, and the outer wall of the scraper 4 abuts against the inner wall of the smoking frame 21 and the outer wall of the mounting frame 2. A handle 41 is fixedly connected to the side of the scraper 4 located outside the mounting frame 2, and a positioning magnetic block 42 is fixedly connected to the outer wall of the scraper 4. Fixed magnetic blocks 22 are fixedly connected to both sides of the outer wall of the mounting frame 2, and the fixed magnetic blocks 22 abut against and attract each other to the positioning magnetic blocks 42.

[0028] It should be noted that during subsequent use, the scraper 4 can be moved as needed. The moved scraper 4 can scrape and clean the oil stains on the smoke frame 21 by abutting against it, thereby reducing the accumulation of oil stains on the smoke frame 21. This prevents the opening of the smoke frame 21 on the side inside the smoke slot from becoming smaller due to the accumulation of oil stains, which in turn causes the noise of the range hood body 1 to increase when it is working.

[0029] Furthermore, when not in use, the scraper 4 can be moved to one side of the mounting frame 2 by the mutual attraction of the fixing magnet 22 and the positioning magnet 42, so that the scraper 4 can be stably located at the end of the mounting frame 2, thereby reducing the obstruction of the scraper 4 to the working smoke frame 21 of the range hood body 1.

[0030] In the embodiments of this utility model, please refer to Figures 1 to 4 The range hood body 1 is provided with a fixedly connected mounting plate 3, and a fixedly connected rubber plate 31 is glued on the mounting plate 3.

[0031] It should be noted that after the range hood body 1 is installed on the wall, the vibration generated by the range hood body 1 during operation can be physically isolated by the rubber pad against the wall, thereby helping to reduce the noise of the device during operation.

[0032] The working principle of the active noise reduction device for the range hood provided by this utility model is as follows:

[0033] When using this device, the bolts required for installation can be inserted into the mounting plate 3, and then the device can be fixedly installed in the required position through the mounting plate 3. At this time, the rubber plate 31 located outside the mounting plate 3 can achieve physical isolation between the mounting plate 3 and the wall.

[0034] Later, when the range hood body 1 is working, its vibration is transmitted to the mounting plate 3 and then to the wall. The rubber plate 31 can buffer the vibration, thereby avoiding vibration noise between the vibration and the wall.

[0035] Furthermore, during the operation of the range hood body 1, since the smoke frame 21 is located on one side of the smoke slot with a relatively large opening, according to Bernoulli's principle, when air flows from a relatively small opening to a relatively large opening, its airflow speed decreases, thereby reducing the noise during gas flow. Therefore, active noise reduction of the range hood body 1 can be achieved.

[0036] Meanwhile, during subsequent use, the scraper 4 can be moved as needed. The moved scraper 4 can scrape and clean the oil stains on the smoke frame 21 by abutting against it, thereby reducing the accumulation of oil stains on the smoke frame 21. This prevents the opening of the smoke frame 21 located in the smoke slot from becoming smaller due to the accumulation of oil stains, which in turn causes the noise of the range hood body 1 to increase when it is working.

[0037] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0038] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An active noise reduction device for a range hood, characterized in that, include: The range hood body (1) has a smoke extraction groove (11) on its panel and an installation groove (12) on the outside of the smoke extraction groove (11) on the panel of the range hood body (1). A fixedly connected mounting frame (2) is installed on the mounting groove (12). A smoking frame (21) is provided on the outer wall of the mounting frame (2), and the end section of the smoking frame (21) is trumpet-shaped.

2. The active noise reduction device for a range hood according to claim 1, characterized in that, The smoking frame (21) is equipped with a slidingly connected scraper (4), and the outer wall of the scraper (4) abuts against the inner wall of the smoking frame (21) and the outer wall of the mounting frame (2).

3. The active noise reduction device for a range hood according to claim 2, characterized in that, The scraper (4) has a fixedly connected handle (41) on one side outside the mounting frame (2), and a fixedly connected positioning magnetic block (42) is installed on the outer wall of the scraper (4).

4. The active noise reduction device for a range hood according to claim 3, characterized in that, Fixed magnetic blocks (22) are installed on both sides of the outer wall of the mounting frame (2), and the fixed magnetic blocks (22) and the positioning magnetic blocks (42) abut against each other and attract each other.

5. The active noise reduction device for a range hood according to claim 1, characterized in that, The range hood body (1) is provided with a fixedly connected mounting plate (3), and a fixedly connected rubber plate (31) is glued on the mounting plate (3).

6. The active noise reduction device for a range hood according to claim 1, characterized in that, The side with the larger opening of the smoking frame (21) is located inside the smoking trough (11), and the side with the smaller opening of the smoking frame (21) is located inside the mounting frame (2).

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