Noise reduction structure of range hood

Abstract

The application discloses a noise reduction structure of an extractor hood, which comprises a lower cavity and an upper cavity installed on the top of the lower cavity, the top of the lower cavity is provided with an air outlet, the upper cavity comprises an air inlet cover plate, the bottom of the air inlet cover plate is provided with an air inlet communicated with the air outlet, the top of the lower cavity is provided with a connecting part connected with the air inlet cover plate, and the air inlet cover plate is arranged on the inner side of the connecting part. The connecting part comprises a left connecting part and a right connecting part, air inlet gaps with downward openings are formed between the left and right sides of the air inlet cover plate and the connecting parts on the corresponding sides, and air blocking members are installed on the air inlet cover plate or the connecting parts and used for blocking the airflow blown out of the air outlet from flowing into the air inlet gaps. The air inlet cover plate of the upper cavity of the noise reduction structure of the extractor hood is arranged on the inner side of the connecting part of the lower cavity, the air blocking members can prevent the airflow blown out of the air outlet from flowing into the air inlet gaps between the air inlet cover plate and the connecting part of the lower cavity, so that the airflow loss can be reduced, and the noise can be reduced.

Description

Technical Field

[0001] This invention relates to a range hood, and more particularly to a noise reduction structure for a range hood. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. Existing range hoods typically consist of an upper chamber and a lower chamber. The upper chamber houses the exhaust fan, while the lower chamber contains an air inlet. The lower chamber has an air outlet at its top, and the upper chamber has an air inlet at its bottom. During installation, the upper chamber is mounted on top of the lower chamber, with the lower chamber's air outlet aligned with the upper chamber's air inlet. During operation, the exhaust fan draws the cooking fumes into the air inlet, which are then discharged into the exhaust duct through the upper chamber's exhaust port. However, because the upper and lower chambers are assembled vertically, airflow can be lost through gaps between them, leading to noise and negatively impacting the user experience. Currently, noise reduction is typically achieved by installing sound-absorbing cotton, but this is costly and requires manual installation, wasting labor. Therefore, further improvements to the noise reduction structure of existing range hoods are necessary. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a noise reduction structure for a range hood that can effectively reduce airflow loss and noise, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: the noise reduction structure of the range hood includes a lower cavity and an upper cavity installed on the top of the lower cavity. The lower cavity has an air outlet at the top, and the upper cavity includes an air inlet cover. The bottom of the air inlet cover forms an air inlet that communicates with the air outlet. The top of the lower cavity has a connecting part that connects to the air inlet cover. The air inlet cover is located inside the connecting part. The connecting part includes a left connecting part and a right connecting part. A downward-facing air inlet gap is formed between the left and right sides of the air inlet cover and the corresponding connecting parts. A wind baffle is installed on the air inlet cover or on the connecting part. The wind baffle is used to prevent the airflow blown out of the air outlet from flowing into the air inlet gap.

[0005] Preferably, a lower connector is installed on the outer side of the left and right connecting parts, and an upper connector is installed on the left and right outer walls of the air inlet cover. The upper and lower connectors are detachably connected.

[0006] The upper and lower connectors can have various connection structures. Preferably, the lower connector has a hook hole and the upper connector has a hook. The hook abuts against the upper edge of the hook hole so that the lower connector hangs on the upper connector.

[0007] Further preferably, an outer mounting hole is provided on the lower connector, which is located below the hook hole. An inner mounting hole is provided on the corresponding side of the connecting part of the lower cavity. The bolt passes through the inner mounting hole and the outer mounting hole to fix the lower connector to the connecting part of the lower cavity. Recesses are formed on the left and right walls of the air inlet cover to avoid the bolt. The air inlet gap is formed between the recesses and the corresponding side connecting parts.

[0008] To prevent airflow from entering the air inlet gap, the wind deflector is installed inside the left and right connecting parts. The upper part of the wind deflector has an inwardly bent portion that covers the air inlet gap. The vertical projection of the concave portion falls onto the bent portion.

[0009] To further reduce noise, the lower inner wall of the wind deflector is provided with guide ribs, which are arranged vertically and spaced apart along the front-to-back direction.

[0010] Preferably, the lower part of the windbreak is attached to the inner wall of the left and right connecting parts. This helps to reduce airflow loss.

[0011] Further preferably, the lower part of the windbreak has a vertical portion and an inclined portion extending obliquely outward to the lower edge of the vertical portion. The lower part of the guide rib is disposed on the inclined portion, and the upper part of the guide rib is disposed on the vertical portion. With the above structure, the guide rib not only facilitates airflow guidance but also reduces noise.

[0012] The windshield can have various structures. Preferably, the windshield is U-shaped, with the left and right side walls of the windshield installed on the left and right connecting parts, respectively, and the rear side wall of the windshield installed on the rear cover plate of the lower cavity.

[0013] As a preferred embodiment of any of the above solutions, an oil fume extraction fan is installed in the upper cavity.

[0014] Compared with the prior art, the advantages of the present invention are as follows: the air inlet cover of the upper cavity of the noise reduction structure of the range hood is located on the inner side of the lower cavity connection part, and the wind baffle can prevent the airflow blown out of the air outlet from flowing into the air inlet gap between the air inlet cover and the lower cavity connection part, thereby reducing airflow loss and thus reducing noise. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0016] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0017] Figure 3 This is an exploded view of an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram from another angle of an embodiment of the present invention;

[0019] Figure 5 for Figure 4 Enlarged schematic diagram of part B in the middle;

[0020] Figure 6 This is a schematic diagram of the structure of the windshield component according to an embodiment of the present invention;

[0021] Figure 7 This is a structural cross-sectional view of an embodiment of the present invention;

[0022] Figure 8 for Figure 7 An enlarged schematic diagram of section C. Detailed Implementation

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

[0024] like Figures 1 to 8 As shown, the range hood in this embodiment has a split upper and lower structure, specifically including a lower cavity 1 and an upper cavity 2 installed on top of the lower cavity 1. The lower cavity 1 has an air outlet at its top and an air inlet chamber inside. The upper cavity 2 houses a range hood fan 7 and includes an air inlet cover 21. The bottom of the air inlet cover 21 forms an air inlet that communicates with the air outlet. The top of the lower cavity 1 has a connecting portion that connects to the air inlet cover 21. During installation, the air inlet cover 21 is mounted on the connecting portion. The above structure is the same as the installation structure of the upper and lower cavities in existing split upper and lower range hoods, and will not be described further here.

[0025] In this embodiment, the air inlet cover 21 is located inside the connecting portion. The connecting portion includes a left connecting portion 11 and a right connecting portion 12. A downward-facing left air inlet gap 3 is formed between the left side of the air inlet cover 21 and the left connecting portion 11, and a right air inlet gap 3 is formed between the right side of the air inlet cover 12 and the right connecting portion 12. The presence of this air inlet gap 3 causes airflow loss and noise. Therefore, the noise reduction structure of this range hood includes a baffle 4 on the air inlet cover 21. The baffle 4 can prevent the airflow from the outlet from flowing into the air inlet gap 3, thereby reducing operating noise.

[0026] In this embodiment, the upper cavity 2 and the lower cavity 1 are detachably connected, and the specific installation structure is as follows:

[0027] Lower connectors 6 are installed on the outer sides of the left connecting part 11 and the right connecting part 12 of the lower cavity 1, and upper connectors 5 are installed on the left and right outer walls of the air inlet cover 21. The lower connector 6 has a hook hole 61, and the upper connector 5 has a hook 51. The hook 51 abuts against the upper edge of the hook hole 61, allowing the lower connector 6 to hang on the upper connector 5. Thus, the upper connector 5 and the lower connector 6 can be detachably connected, allowing the lower cavity 1 to hang on the upper cavity 2.

[0028] In this embodiment, an outer mounting hole 62 is provided on the lower connector 6, located below the hook hole 61. An inner mounting hole 13 is provided on the corresponding connecting part of the lower cavity 1. The bolt 8 passes through the inner mounting hole 13 and the outer mounting hole 62 to fix the lower connector 6 to the corresponding connecting part of the lower cavity 1. Recesses 22 are formed on the left and right walls of the air inlet cover 21 to avoid the bolt 8, and an air inlet gap 3 is formed between the recesses 22 and the corresponding connecting parts.

[0029] In this embodiment, the wind deflector 4 is used to block the air inlet gap 3, preventing airflow from entering the air inlet gap 3, thereby reducing airflow noise. Figure 6 As shown, the wind deflector 4 is U-shaped. The left and right side walls of the wind deflector 4 are respectively installed on the left connecting part 11 and the right connecting part 12, and the rear side wall of the wind deflector 4 is installed on the rear cover plate 14 of the lower cavity. Furthermore, the lower part of the wind deflector 4 is fitted snugly to the lower cavity 1 without any installation gap.

[0030] like Figure 7 and Figure 8 As shown, both the left and right sides of the wind deflector 4 have inwardly bent portions 41. These bent portions 41 can block the air inlet gap 3, and the vertical projection of the recessed portion 22 falls onto the bent portion 41. Thus, when airflow moves from bottom to top, the presence of the bent portions 41 of the wind deflector 4 prevents airflow from flowing into the air inlet gap 3, and also prevents it from flowing into the inverted connection between the upper connector 5 and the lower connector 6, thereby reducing airflow loss and noise.

[0031] In addition, guide ribs 42 are protruding on the lower inner wall of the left side and the lower inner wall of the right side of the wind deflector 4. The guide ribs 42 are arranged vertically and are spaced apart along the front-to-back direction. The lower part of the wind deflector 4 has a vertical part 43 and an inclined part 44 extending obliquely outward to the lower edge of the vertical part. The lower part of the guide ribs 42 is located on the inclined part 44, and the upper part of the guide ribs 42 is located on the vertical part 43. When the airflow passes through the wind deflector 4, due to the abrupt change in the cross-section of the wind deflector 4, airflow dispersion will occur. The guide ribs 42 can disperse the airflow and further reduce noise.

Claims

1. A noise reduction structure for a range hood, comprising a lower cavity (1) and an upper cavity (2) mounted on top of the lower cavity, wherein the lower cavity (1) has an air outlet at its top, the upper cavity (2) includes an air inlet cover (21), the bottom of the air inlet cover (21) forming an air inlet communicating with the air outlet, and the lower cavity (1) has a connecting portion at its top connected to the air inlet cover (21), characterized in that: The air inlet cover (21) is located on the inner side of the connecting part. The connecting part includes a left connecting part (11) and a right connecting part (12). An air inlet gap (3) with an opening facing downward is formed between the left and right sides of the air inlet cover (21) and the corresponding connecting parts. A wind baffle (4) is installed on the air inlet cover (21) or on the connecting part. The wind baffle (4) is used to block the airflow blown out of the air outlet from flowing into the air inlet gap (3). The wind baffle (4) is U-shaped. The left and right side walls of the wind baffle (4) are respectively installed on the left connecting part (11) and the right connecting part (12). The rear side wall of the wind baffle (4) is installed on the rear cover (14) of the lower cavity. An oil fume fan (7) is installed in the upper cavity (2).

2. The noise reduction structure of the range hood according to claim 1, characterized in that: The left connecting part (11) and the right connecting part (12) are equipped with a lower connecting part (6), and the air inlet cover (21) is equipped with an upper connecting part (5) on the left and right outer walls. The upper connecting part (5) and the lower connecting part (6) are detachably connected.

3. The noise reduction structure of the range hood according to claim 2, characterized in that: The lower connector (6) has a hook hole (61), and the upper connector (5) has a hook (51). The hook (51) abuts against the upper edge of the hook hole (61) so that the lower connector (6) hangs on the upper connector (5).

4. The noise reduction structure of the range hood according to claim 3, characterized in that: An outer mounting hole (62) is provided on the lower connector (6), which is located below the hook hole (61). An inner mounting hole (13) is provided on the connecting part of the corresponding side of the lower cavity (1). The bolt (8) passes through the inner mounting hole (13) and the outer mounting hole (62) to fix the lower connector (6) on the connecting part of the lower cavity (1). An inner recess (22) is formed on the left and right walls of the air inlet cover (21) to avoid the bolt (8). The air inlet gap (3) is formed between the inner recess (22) and the connecting part on the corresponding side.

5. The noise reduction structure of the range hood according to claim 4, characterized in that: The wind deflector (4) is installed on the inside of the left connecting part (11) and the right connecting part (12). The upper part of the wind deflector (4) has a bent part (41) that bends inward. The bent part (41) covers the air inlet gap (3). The vertical projection of the concave part (22) falls on the bent part (41).

6. The noise reduction structure of the range hood according to claim 5, characterized in that: The wind deflector (4) has a guide rib (42) protruding on its lower inner sidewall. The guide rib (42) is arranged vertically and is distributed at intervals along the front-back direction.

7. The noise reduction structure of the range hood according to claim 6, characterized in that: The lower part of the windshield (4) is attached to the inner wall of the left connecting part (11) and the right connecting part (12).

8. The noise reduction structure of the range hood according to claim 6, characterized in that: The lower part of the wind deflector (4) has a vertical part (43) and an inclined part (44) extending obliquely outward to the lower edge of the vertical part. The lower part of the guide rib (42) is provided on the inclined part (44), and the upper part of the guide rib (42) is provided on the vertical part (43).

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