Noise reduction cover and blower comprising same

Abstract

The noise reduction cover comprises a noise reduction cover body, the noise reduction cover body is of a hollow structure, the rear section of the noise reduction cover body is of a closed structure, the front section of the noise reduction cover body is provided with at least one first through hole, and the first through hole is used for external air to enter the blower. According to a traditional fan cover, air passing holes are formed in the side wall of the fan cover, noise generated when a hair drier works can directly penetrate out of the air passing holes, noise of the surrounding environment of the hair drier is large, and human health is not facilitated. According to the noise reduction cover of the scheme, the first through hole is formed in the front side wall of the noise reduction cover body and used for allowing external air to enter the blower, noise generated by the blower during working cannot be directly transmitted out from the side wall of the noise reduction cover body, the inner side wall of the noise reduction cover body can block the noise, the noise is reflected, and finally the noise is transmitted out from the first through hole; in the process, the noise is partially reduced, and the noise reduction effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hair dryers, in particular to a noise reduction cover and a hair dryer containing the same. Background Art

[0002] A hair dryer is a common household appliance, often used to dry the hair of pets or people after bathing. However, it produces a lot of noise when in use, which can easily cause stress reactions in pets and affect their health. The noise can also affect human health. It usually takes a long time to dry hair with a hair dryer. During this period, the hair dryer continues to make a lot of noise, which also causes continuous noise troubles to pets or people. Traditional hair dryers generally have a cylindrical wind hood with mesh holes on the entire side wall. The noise generated by the hair dryer's motor when working is directly transmitted from the mesh holes without any obstruction, making the hair dryer noisy. Utility Model Content

[0003] The utility model aims to provide a noise reduction cover and a hair dryer containing the same, so as to solve the technical problem in the prior art that the wind cover of the hair dryer is directly provided with mesh holes on the entire side wall, causing the noise generated by the motor of the hair dryer when working to be directly transmitted from the mesh holes without any obstruction, resulting in a loud noise of the hair dryer.

[0004] The utility model provides a noise reduction cover, which is used to be installed at the air inlet of a hair dryer, comprising a noise reduction cover body, the noise reduction cover body is a hollow structure, the rear section of the noise reduction cover body is a closed structure, and the front section of the noise reduction cover body is provided with at least one first through hole, and the first through hole is used to allow external air to enter the hair dryer.

[0005] As described above, the front section of the noise reduction cover body has a front side wall and a circumferential wall, the first through hole is arranged on the front side wall, and the circumferential wall is connected to the rear section of the noise reduction cover body.

[0006] As described above, the noise reduction cover body includes a rear shell and a front shell, the front shell cover is arranged on the front end wall of the rear shell, the outer peripheral wall of the rear shell is a closed structure, and the front side wall is arranged at the front side end of the front shell.

[0007] As for the noise reduction cover as described above, the projection length of the first through hole in the horizontal direction is less than 50% of the projection length of the noise reduction cover body in the horizontal direction.

[0008] As for the noise reduction cover as described above, the projection length of the first through hole in the horizontal direction is less than 40% of the projection length of the noise reduction cover body in the horizontal direction.

[0009] As described above, the noise reduction cover has at least one first rib extending inwardly disposed on the inner side wall of the noise reduction cover body.

[0010] In the noise reduction cover as described above, a sealing edge extending forward is provided on the inner edge of the front side wall.

[0011] The utility model also provides a hair dryer, comprising the noise reduction cover as described above.

[0012] The hair dryer as described above includes a wind tube and a fan assembly, a wind cavity is formed in the wind tube, the fan assembly is arranged in the wind cavity, an air outlet is formed at one end of the wind tube, an air inlet is provided on the side wall of the wind tube, the air inlet and the air outlet are both connected to the wind cavity, and the noise reduction cover is arranged on the side wall of the wind tube and covers the air inlet.

[0013] In the hair dryer as described above, the wind cavity is divided into a first area and a second area, the first area and the second area are connected, the fan assembly is arranged in the first area, the air outlet is arranged at an end of the first area away from the second area, and the air inlet is arranged on the periphery of the second area.

[0014] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0015] In the utility model, the noise reduction cover body is a hollow structure, the rear section of the noise reduction cover body is a closed structure, and the front section of the noise reduction cover body is provided with at least one first through hole, and the first through hole is used to allow external air to enter the hair dryer. The traditional wind cover is provided with air holes on its side wall, and the noise generated when the hair dryer is working will directly pass through the air holes, making the noise in the environment around the hair dryer loud, which is not conducive to human health; while the noise reduction cover of the present scheme is provided with a first through hole on the front side wall of the noise reduction cover body, so as to allow external air to enter the interior of the hair dryer, and the noise generated when the hair dryer is working will not be directly transmitted from the side wall of the noise reduction cover body, and the inner side wall of the noise reduction cover body can block the noise, make it reflect, and finally transmit it from the first through hole. In this process, the noise is partially reduced, and the effect of noise reduction is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a schematic structural diagram of a noise reduction cover according to an exemplary embodiment;

[0018] Figure 2is a side view of a noise reduction cover according to an exemplary embodiment;

[0019] Figure 3 is a schematic structural diagram of a hair dryer according to an exemplary embodiment;

[0020] Figure 4 is a top cross-sectional view of a hair dryer according to an exemplary embodiment.

[0021] Among them: 1. Noise reduction cover body; 11. Front side wall; 12. First through hole; 13. Edge sealing; 14. First rib; 2. Air duct; 21. Air cavity; 211. First area; 212. Second area; 22. Air outlet; 23. Air inlet; 3. Fan assembly. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] See also Figure 1-Figure 2 The utility model provides a noise reduction cover, which is used to be installed at the air inlet 23 of the hair dryer. The utility model includes a noise reduction cover body 1, which is a hollow structure. The rear section of the noise reduction cover body 1 is a closed structure. The front section of the noise reduction cover body 1 is provided with at least one first through hole 12, and the first through hole 12 is used to allow external air to enter the hair dryer. The traditional wind cover is provided with air holes on its side wall. When the hair dryer is working, the noise generated will directly pass through the air holes, making the noise around the hair dryer loud, which is not conducive to human health; while the noise reduction cover of the present scheme is provided with a first through hole 12 on the front side wall 11 of the noise reduction cover body 1, so as to allow external air to enter the inside of the hair dryer. The noise generated by the hair dryer working will not be directly transmitted from the side wall of the noise reduction cover body 1. The inner side wall of the rear section of the noise reduction cover body 1 can block the noise and reflect it, and finally it will be transmitted from the first through hole 12. In this process, the noise is partially reduced to achieve the effect of noise reduction.

[0028] Furthermore, the front section of the noise reduction cover body 1 has a front side wall 11 and a circumferential wall, the first through hole 12 is provided on the front side wall 11, and the circumferential wall is connected to the rear section of the noise reduction cover body 1. The noise generated by the operation of the hair dryer is partially dissipated to the rear section of the noise reduction cover body 1, and is blocked by the inner wall of the rear section of the noise reduction cover body 1, so that the noise is partially reduced, achieving the effect of noise reduction. By testing the noise of the hair dryer before and after the noise reduction cover is installed in multiple directions, it can be seen from the test data that the noise after the noise reduction cover is installed is reduced by 2 decibels compared with the noise before installation.

[0029] Furthermore, the noise reduction cover body 1 includes a rear shell and a front shell, the front shell cover is arranged on the front end wall of the rear shell, the front shell is clamped on the rear shell, the outer peripheral wall of the rear shell is a closed structure, and the front side wall is arranged at the front side end of the front shell. The noise generated by the hair dryer is partially dissipated to the inner wall of the rear shell, and since the outer peripheral wall of the rear shell is a closed structure, part of the noise can be reduced to achieve the effect of noise reduction.

[0030] Further, the projection length of the first through hole 12 in the horizontal direction is less than 50% of the projection length of the noise reduction cover body 1 in the horizontal direction. At least half of the noise reduction cover body 1 has a sealed structure, which can block a large part of the noise, so that it cannot be directly transmitted from the side wall of the noise reduction cover body 1, thereby ensuring the noise reduction effect. In a specific embodiment, the projection length of the first through hole 12 in the horizontal direction is 45%, 40%, 35%, 30%, 25%, 20%, 15%, 10% or 5% of the projection length of the noise reduction cover body 1 in the horizontal direction. It should be noted that the hair dryer is usually a long strip structure arranged in front and back, and most of the noise generated by the fan assembly 3 will be scattered to the rear end along the inner cavity of the hair dryer, so the rear end of the noise reduction cover body 1 is designed as a sealed side wall, and the first through hole 12 is arranged at the front end, which is conducive to noise reduction.

[0031] Furthermore, the horizontal projection length of the first through hole 12 is less than 40% of the horizontal projection length of the noise reduction cover body 1. At least 60% of the side wall structure of the noise reduction cover body 1 is sealed, which can block more noise and prevent it from being directly transmitted from the side wall of the noise reduction cover body 1, thereby improving the noise reduction effect. In a specific embodiment, the horizontal projection length of the first through hole 12 is 35%, 30%, 25%, 20%, 15%, 10% or 5% of the horizontal projection length of the noise reduction cover body 1.

[0032] Furthermore, the front side wall 11 is provided with a plurality of first through holes 12, and the plurality of first through holes 12 are evenly distributed on the front side wall 11. The noise generated by the operation of the hair dryer is evenly transmitted from the plurality of first through holes 12, and is reflected multiple times in the multiple holes, and the energy is greatly attenuated, so that the reflected sound becomes smaller, thereby reducing the noise.

[0033] Furthermore, the front side wall 11 is an annular wall that is inclined backward from the inside to the outside, and the first through hole 12 is radially arranged, which is convenient for production and reduces the production cost of the noise reduction cover.

[0034] Furthermore, a sealing edge 13 extending forward is provided on the inner edge of the front side wall 11. A corresponding slot is provided on the hair dryer, and the sealing edge 13 is inserted into the slot of the hair dryer, so that the noise reduction cover is installed on the hair dryer.

[0035] The rear inner wall of the noise reduction cover body 1 is provided with a groove, and a sealing ring is provided in the groove. The front side wall 11 of the sealing ring is used to abut against the rear side wall of the hair dryer. The rear side wall of the noise reduction cover body 1 is a hollow annular structure. When the noise reduction cover is installed on the hair dryer, the rear side wall of the noise reduction cover body 1 is close to the rear side wall of the hair dryer, and one end of the sealing ring abuts against the bottom wall of the groove, and the other end abuts against the rear side wall of the hair dryer, thereby achieving a sealing effect.

[0036] In another embodiment, see Figure 3-Figure 4 The utility model provides a hair dryer, comprising the noise reduction cover as mentioned above.

[0037] Furthermore, the hair dryer also includes a wind tube 2 and a fan assembly 3. A wind cavity 21 is formed in the wind tube 2. The fan assembly 3 is arranged in the wind cavity 21. An air outlet 22 is formed at one end of the wind tube 2. An air inlet 23 is arranged on the side wall of the wind tube 2. The air inlet 23 and the air outlet 22 are both connected to the wind cavity 21. A noise reduction cover is arranged on the side wall of the wind tube 2 and covers the air inlet 23. The noise reduction cover covers the air inlet 23 so that the external gas can enter the air inlet 23 only after passing through the first through hole 12, and finally enter the wind cavity 21. Under the action of the fan assembly 3, a concentrated airflow is formed and blown out from the air outlet 22. Similarly, the noise generated by the operation of the fan assembly 3 will not be directly transmitted from the side wall of the noise reduction cover. The side wall of the noise reduction cover can block the noise so that it is transmitted from the first through hole 12 of the noise reduction cover after reflection. By testing the noise in multiple directions before and after the noise reduction cover is installed on the hair dryer, the test data shows that the noise after installing the noise reduction cover is 2 decibels lower than the noise before installation.

[0038] Specifically, the hair dryer 2 includes a hair dryer body and a handle, the handle is arranged on the outer wall of the hair dryer body and is located at the bottom of the hair dryer body, the air outlet 22 is arranged on the front end wall of the hair dryer body, the air cavity 21 is arranged on the hair dryer body, and the air cavity 21 is connected with the internal cavity of the handle, and the air inlet 23 is arranged on the side wall at the rear end of the hair dryer body or on the side wall at the bottom end of the handle.

[0039] Furthermore, an outer shell is provided on the outer periphery of the air duct body, and a mounting groove is formed between the outer shell and the air duct body, with the opening of the mounting groove facing the rear side, and a diamond mesh is provided on the side wall of the air duct body, which surrounds and wraps the air inlet 23, and the diamond mesh is flush with the outer side wall of the air duct body, and the end of the diamond mesh is inserted into the mounting groove and is close to the inner ring wall of the mounting groove, and the edge seal 13 on the noise reduction cover is also inserted into the mounting groove, and the inner side wall of the edge seal 13 is close to the outer side wall of the diamond mesh, and the outer side wall of the edge seal 13 is close to the outer ring wall of the mounting groove, thereby fixing the noise reduction cover to the air duct body.

[0040] Furthermore, at least one first rib 14 extending inward is provided on the inner side wall of the noise reduction cover body 1. Specifically, the noise reduction cover is arranged on the outer periphery of the diamond mesh, and a cavity is formed between the two. The first rib 14 is arranged in the cavity, and the first rib 14 abuts against the outer periphery of the diamond mesh, which is conducive to improving the stability of the structure. It should be understood that the diamond mesh is a mesh structure with multiple small holes, which is breathable.

[0041] Further, the air cavity 21 is divided into a first area 211 and a second area 212, the first area 211 and the second area 212 are connected, the fan assembly 3 is arranged in the first area 211, the air outlet 22 is arranged at one end of the first area 211 away from the second area 212, and the air inlet 23 is arranged at the periphery of the second area 212. Specifically, a partition plate is arranged in the air cavity 21, the partition plate divides the air cavity 21 to form the first area 211 and the second area 212, and a plurality of connection holes arranged front and back are arranged on the partition plate, the connection holes connect the first area 211 and the second area 212, the noise generated by the fan assembly 3 in the first area 211 when working is dissipated to the second area 212 after passing through the connection holes, and the wind noise cover is arranged on the periphery of the second area 212 to block the noise.

[0042] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model.

Claims

1. A noise reduction cover, used to be installed at the air inlet of a hair dryer, characterized in that: It comprises a noise reduction cover body, which is a hollow structure, a rear section of which is a closed structure, and a front section of which is provided with at least one first through hole, which is used for allowing external air to enter the hair dryer.

2. The noise reduction cover according to claim 1, characterized in that: The front section of the noise reduction cover body has a front side wall and a circumferential wall, the first through hole is arranged on the front side wall, and the circumferential wall is connected to the rear section of the noise reduction cover body.

3. The noise reduction cover according to claim 2, characterized in that: The noise reduction cover body includes a rear shell and a front shell. The front shell is covered on the front end wall of the rear shell. The outer peripheral wall of the rear shell is a closed structure. The front side wall is arranged at the front side end of the front shell.

4. The noise reduction cover according to claim 3, characterized in that: The projection length of the first through hole in the horizontal direction is less than 50% of the projection length of the noise reduction cover body in the horizontal direction.

5. The noise reduction cover according to claim 4, characterized in that: The projection length of the first through hole in the horizontal direction is less than 40% of the projection length of the noise reduction cover body in the horizontal direction.

6. The noise reduction cover according to claim 1, characterized in that: At least one first rib extending inwardly is provided on the inner side wall of the noise reduction cover body.

7. The noise reduction cover according to claim 3, characterized in that: The inner edge of the front side wall is provided with a sealing edge extending forward.

8. A hair dryer, characterized in that: The invention comprises the noise reduction cover as claimed in any one of claims 1 to 7.

9. The hair dryer according to claim 8, characterized in that: The hair dryer includes a wind tube and a fan assembly, a wind cavity is formed in the wind tube, the fan assembly is arranged in the wind cavity, an air outlet is formed at one end of the wind tube, an air inlet is arranged on the side wall of the wind tube, the air inlet and the air outlet are both connected to the wind cavity, and the noise reduction cover is arranged on the side wall of the wind tube and covers the air inlet.

10. The hair dryer according to claim 9, characterized in that: The wind cavity is divided into a first area and a second area, the first area and the second area are connected, the fan assembly is arranged in the first area, the air outlet is arranged at an end of the first area away from the second area, and the air inlet is arranged on the periphery of the second area.

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