Noise reduction structure of range hood and range hood

Abstract

The present invention discloses a noise reduction structure of a range hood and the range hood, wherein the range hood comprises a range hood body with an air inlet, an oil net is arranged at the air inlet of the range hood body, a fan is arranged in the range hood body, a plurality of partitions are arranged between the oil net and the fan, ventilation holes are opened on the partitions or ventilation holes are formed between the partitions and the side walls of the range hood body, the ventilation holes are arranged in an up-and-down staggered manner and have a simple structure, so that the range hood can have sound insulation and sound absorption functions, thereby further improving the noise reduction effect of the range hood.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a noise reduction structure of a range hood and the range hood. Background Art

[0002] In recent years, the range hood market has been promoting the concepts of large air volume and large suction power. As people's requirements for quality of life increase, users are paying more and more attention to the size of range hood noise parameters when purchasing range hoods. It can be said that the quality of range hood noise performance is a key factor in product competitiveness.

[0003] In the related art, the air volume of the range hood is gradually increased, but the noise it generates is also getting louder and louder. When the range hood is turned on during cooking, you can hardly hear the voices of people, the phone, the doorbell, and the children. In fact, this strong noise can cause adverse reactions such as irritability, headache, and palpitations in the kitchen operators. If people use the range hood with strong noise for a long time, it will have a serious impact on people's physical and mental health. Therefore, noise has become a technical problem that needs to be solved urgently in the existing range hoods. Summary of the invention

[0004] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes a noise reduction structure for a range hood, which has a simple structure and can enable the range hood to have sound insulation and sound absorption functions, thereby further improving the noise reduction effect of the range hood.

[0005] In addition, the present invention also proposes a range hood, which has a reasonable design and can effectively reduce the noise generated by the range hood.

[0006] The first objective is achieved through the following technical solutions:

[0007] A noise reduction structure for a range hood, the range hood comprising a range hood body with an air inlet, an oil net being arranged at the air inlet of the range hood body, a fan being arranged inside the range hood body, a plurality of partitions being arranged between the oil net and the fan, ventilation holes being opened on the partitions or formed between the partitions and the side walls of the range hood body, and the ventilation holes being arranged alternately up and down.

[0008] In some embodiments, sound absorbing protrusions are provided on the partition.

[0009] In some embodiments, the sound absorbing protrusion is a hollow thin-walled structure, and the wall thickness of the sound absorbing protrusion is 0.2 mm to 1 mm.

[0010] In some embodiments, the sound absorbing protrusions are filled with sound absorbing materials.

[0011] In some embodiments, the density of the sound-absorbing material filled in the sound-absorbing protrusions on each layer of the partition is different, and the density of the sound-absorbing material on the partition gradually increases from the oil net toward the fan.

[0012] In some embodiments, four layers of partitions are sequentially arranged in the direction from the oil net to the fan, wherein the density of the sound absorbing material on the first layer of partitions is 2 to 10 kg / m 3 The density of the sound absorbing material on the second partition is 11 to 20 kg / m 3 The density of the sound absorbing material on the third partition is 25 to 35 kg / m 3 The density of the sound absorbing material on the fourth partition is 40 to 60 kg / m 3 .

[0013] In some embodiments, the cross-section of the sound absorbing protrusion is semi-elliptical.

[0014] In some embodiments, the width of the vent is 35 mm to 65 mm.

[0015] In some embodiments, the separator has a thickness of 0.2 mm to 2 mm.

[0016] The above second purpose is achieved through the following technical solutions:

[0017] A range hood comprises the range hood noise reduction structure described in any one of the above embodiments.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. The noise reduction structure of the range hood of the present invention has a simple structure and can enable the range hood to have sound insulation and sound absorption functions, thereby further improving the noise reduction effect of the range hood.

[0020] 2. Its reasonable design can absorb all frequency bands of noise generated by the range hood, thereby improving the user experience.

[0021] 3. The range hood of the present invention is reasonably designed and can effectively reduce the noise generated by the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural schematic diagram of a noise reduction structure of a range hood in an embodiment of the present invention;

[0023] Figure 2 is a cross-sectional view of a noise reduction structure of a range hood according to an embodiment of the present invention;

[0024] Figure 3Schematic diagram of the structure of the sound absorbing protrusion in the embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0026] Embodiment 1:

[0027] like Figures 1 to 3 As shown, this embodiment provides a noise reduction structure of a range hood, the range hood comprises a range hood body 1 with an air inlet, an oil net 2 is arranged at the air inlet of the range hood body 1, a fan 3 is arranged in the range hood body 1, a plurality of partitions 4 are arranged between the oil net 2 and the fan 3, ventilation holes 5 are opened on the partitions 4 or ventilation holes 5 are formed between the partitions 4 and the side walls of the range hood body 1, and the ventilation holes 5 are staggered up and down.

[0028] In this embodiment, the range hood includes a range hood body 1 with an air inlet, an oil net 2 is arranged at the air inlet of the range hood body 1, and a fan 3 is installed in the range hood body. The fan 3 works to introduce external oil smoke into the range hood body 1 through the air inlet of the range hood body 1. A plurality of partitions 4 are arranged inside the range hood body 1 and between the oil net 2 and the fan 3 to prevent the noise generated by the operation of the fan 3 from being directly transmitted to the outside of the range hood body 1 through the oil net 2, thereby causing a lot of discomfort to the user. The fixed end of the partition 4 of the present embodiment is arranged on the inner wall of the range hood body 1, and the free end extends in the opposite direction of the fixed end of the partition 4 to form a vent 5 between the free end of the partition 4 and the inner wall of the range hood body 1. Of course, a through hole can also be directly opened on the partition 4 to form the vent 5, and two adjacent vents 5 are staggered in the up and down directions, so that the range hood can ensure strong wind force while blocking the noise generated by the fan 3 through the partition 4, so that the noise is reflected, thereby reducing the sound directly transmitted to the outside of the range hood body 1 through the oil net 2, thereby further improving the noise reduction effect of the range hood. The number of layers of the partition 4 is preferably set to four layers, but is not limited to four layers. Other more suitable layers of partitions 4 can also be selected according to actual needs, as long as the range hood can better achieve sound isolation. If the number of partitions 4 is set to be less, the noise reduction effect is not obvious. If the number of partitions 4 is set to be more, the resistance to air flow in the range hood body 1 is increased, which in turn has a greater impact on the air volume of the range hood.

[0029] Furthermore, a sound-absorbing protrusion 41 is provided on the partition plate 4, which has a simple structure and a reasonable design and can effectively absorb the noise generated by the range hood.

[0030] Preferably, the sound-absorbing protrusion 41 is a hollow thin-walled structure, and the wall thickness of the sound-absorbing protrusion 41 is 0.2 mm to 1 mm. The design is reasonable and can effectively reduce the production cost of the product.

[0031] Specifically, the sound-absorbing protrusion 4 is filled with sound-absorbing material, which has a simple structure and can further absorb the noise generated by the range hood.

[0032] In this embodiment, a plurality of sound-absorbing protrusions 41 are arranged at intervals on the upper surface of the partition 4 to absorb the noise generated by the range hood. The sound-absorbing protrusions 41 are hollow broken wall structures, and sound-absorbing materials are filled in the sound-absorbing protrusions 4. The noise generated by the range hood can be transmitted into the interior of the sound-absorbing protrusions 41 through the thin walls of the sound-absorbing protrusions 41, and the sound-absorbing materials are filled in the sound-absorbing protrusions 41 to absorb the noise on the propagation path, thereby enabling the range hood to achieve the effect of sound absorption and noise reduction. The wall thickness of the sound-absorbing protrusions 41 is 0.2 mm to 1 mm, and is particularly preferably 0.5 mm. Other more suitable wall thicknesses can also be selected according to actual needs.

[0033] Preferably, the density of the sound-absorbing material filled in the sound-absorbing protrusions 41 on each layer of the partition 4 is different, and the density of the sound-absorbing material on the partition 4 gradually increases from the oil net 2 to the fan 3. The design is reasonable and ingenious, and can absorb all frequency bands of high, medium and low noise generated by the range hood.

[0034] Furthermore, four layers of partitions 4 are arranged in sequence from the oil screen 2 to the fan 3, wherein the density of the sound absorbing material on the first layer of partitions is 2 to 10 kg / m 3 The density of the sound-absorbing material on the second layer of the partition is 11 to 20 kg / m 3 The density of the sound-absorbing material on the third partition is 25 to 35 kg / m 3 The density of the sound-absorbing material on the fourth partition is 40 to 60 kg / m 3 , it has a simple structure and reasonable design, and can effectively reduce the noise generated by the range hood.

[0035] In this embodiment, the density of the sound-absorbing material filled in the sound-absorbing protrusions 41 on each layer of the partition 4 is different. In order to make the range hood better absorb the full-band noise generated by the range hood, the density of the sound-absorbing material on the partition 4 is preferably gradually increased from the oil net 2 to the fan 3, but it is not limited to the above method. The density of the sound-absorbing material on the partition 4 can also be gradually reduced from the oil net 2 to the fan 3. Of course, other more suitable settings can be selected according to actual needs. When the number of partition layers in this embodiment is set to four layers, that is, the first layer of partitions, the second layer of partitions, the third layer of partitions and the fourth layer of partitions are respectively arranged in the direction from the oil net 2 to the fan 3, wherein the density of the sound-absorbing material on the first layer of partitions is preferably 10kg / m3 In order to absorb noise of 1200Hz-1500Hz, the density of the sound-absorbing material on the second layer of partition is preferably 15kg / m 3 In order to absorb noise of 900Hz-1200Hz, the density of the sound-absorbing material on the third layer of partition is preferably 30kg / m 3 In order to absorb noise of 700Hz-900Hz, the density of the sound-absorbing material on the fourth partition is preferably 50kg / m 3 It is suitable for absorbing noise of 400Hz-700Hz. Its reasonable design can absorb all frequency bands of high, medium and low noise generated by the range hood, thereby improving the user experience.

[0036] Furthermore, the cross section of the sound-absorbing protrusion 41 is semi-elliptical, and its structure is simple, so that the sound-absorbing protrusion can better absorb noise.

[0037] Specifically, the width of the vent 5 is 35 mm to 65 mm, and it has a simple and compact structure and a reasonable design, which can better reduce the resistance to the flow of oil smoke, thereby ensuring the air volume required for the range hood to work.

[0038] In particular, the thickness of the partition 4 is 0.2 mm to 2 mm, and its design is reasonable and ingenious, which can better isolate the noise generated by the fan.

[0039] In this embodiment, in order to better absorb noise, the cross section of the sound-absorbing protrusion 41 is preferably set to be semi-elliptical, but not limited to elliptical, and can also be rectangular, square or semi-circular. Of course, other more suitable shapes can be selected according to actual needs. The cross section of the sound-absorbing protrusion 41 of this embodiment is semi-elliptical. When the sound-absorbing protrusion 41 absorbs the noise generated by the fan 3, the contact area between the sound-absorbing protrusion 41 and the noise can be gradually increased from the fan 3 to the oil net 2, thereby further enhancing the noise reduction effect of the range hood. The width of the vent 5 of this embodiment is 35mm to 65mm. It is more preferable to set the vent 5 to 50mm to reduce the resistance of the oil fume flow as much as possible, thereby ensuring the effect of isolating the sound and ensuring the air volume required for the range hood to work. The thickness of the partition 4 of the present embodiment is 0.2mm to 2mm. It is more preferable to set the thickness of the partition 4 to 1mm so that the noise generated by the fan 3 can be blocked by the partition 4, so that the noise is reflected, thereby reducing the downward propagation of sound to avoid the noise directly propagating through the oil net 2 to the outside of the range hood body 1, reducing the noise felt by the human ear, and thus improving the user experience.

[0040] Embodiment 2:

[0041] like Figures 1 to 3As shown, this embodiment provides a range hood, including the range hood noise reduction structure as described in the first embodiment.

[0042] In the present embodiment, a range hood body 1 is included, which has an air inlet, an oil net 2 is arranged at the air inlet of the range hood body 1, a fan 3 is arranged in the range hood body 1, and a range hood noise reduction structure as described in Example 1 is arranged between the oil net 2 and the fan 3. The range hood is provided with the range hood noise reduction structure as described in Example 1 between the oil net 2 and the fan 3, so that the range hood can ensure strong wind force and can also block the noise generated by the fan 3, so that the noise is reflected, thereby reducing the downward propagation of sound to avoid the noise directly propagating through the oil net 2 to the outside of the range hood body 1, and can also absorb the noise generated by the range hood, thereby effectively reducing the noise generated by the range hood.

[0043] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A noise reduction structure for a range hood, the range hood comprising a range hood body (1) having an air inlet, an oil net (2) being arranged at the air inlet of the range hood body (1), and a fan (3) being arranged inside the range hood body (1), characterized in that: A plurality of partitions (4) are arranged between the oil net (2) and the fan (3), and ventilation holes (5) are provided on the partitions (4) or formed between the partitions (4) and the side walls of the range hood body (1). The ventilation holes (5) are arranged in an alternating manner up and down. Sound-absorbing protrusions (41) are provided on the partitions (4), and the sound-absorbing protrusions (41) are hollow thin-walled structures. Sound-absorbing material is filled in the sound-absorbing protrusions (41). The density of the sound-absorbing material filled in the sound-absorbing protrusions (41) on each layer of the partitions (4) is different. The density of the sound-absorbing material on each layer of the partitions (4) gradually increases from the oil net (2) to the fan (3). The cross section of the sound-absorbing protrusions (41) is semi-elliptical, and the width of the ventilation holes (5) is 35 mm to 65 mm.

2. The noise reduction structure of a range hood according to claim 1, characterized in that: The wall thickness of the sound absorbing protrusion (41) is 0.2 mm to 1 mm.

3. The noise reduction structure of a range hood according to claim 1, characterized in that: Four layers of partitions (4) are arranged in sequence from the oil net (2) toward the fan (3), wherein the density of the sound absorbing material on the first layer of partitions is 2 to 10 kg / m³, the density of the sound absorbing material on the second layer of partitions is 11 to 20 kg / m³, the density of the sound absorbing material on the third layer of partitions is 25 to 35 kg / m³, and the density of the sound absorbing material on the fourth layer of partitions is 40 to 60 kg / m³.

4. A noise reduction structure for a range hood according to any one of claims 1 to 3, characterized in that: The thickness of the partition (4) is 0.2 mm to 2 mm.

5. A range hood, characterized in that: The invention comprises a noise reduction structure for a range hood as claimed in any one of claims 1 to 4.

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