Noise reduction structure, fan and gas water heater

Abstract

The present invention discloses a noise reduction structure, a fan and a gas water heater, which belong to the field of household appliance technology. The noise reduction structure includes a main body and an active noise reduction module. The main body has a gas channel and a noise reduction cavity. The gas channel has an air inlet and an air outlet that are connected. The noise reduction cavity is arranged around the gas channel. The gas channel is connected to the noise reduction cavity. The interior of the noise reduction cavity forms a tortuous sound propagation channel. The active noise reduction module is arranged in the noise reduction cavity. The active noise reduction module can emit corresponding sound waves according to the sound wave information in the noise reduction cavity. The fan includes a housing and the above-mentioned noise reduction structure. The housing has an air inlet, and the air outlet is connected to the air inlet. The gas water heater includes the above-mentioned fan. The noise reduction structure proposed in the present invention combines passive noise reduction with active noise reduction to achieve the effect of dual composite noise reduction, which can better reduce low-frequency noise.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a noise reduction structure, a fan and a gas water heater. Background Art

[0002] Noise is a serious source of pollution that has a great impact on people's daily work and life. As living standards continue to improve, people's tolerance for noise is getting lower and lower. Reducing noise in daily life and work is urgent.

[0003] Existing gas water heaters are noisy during operation, primarily due to low-frequency noise generated by the fan. Gas water heaters typically use a DC fan to provide precise airflow to coordinate combustion. The high-speed rotation of the fan impeller drives the airflow at high speeds, and the friction and resonance between the high-speed airflow and the entire flow path generate high noise levels.

[0004] Existing noise reduction methods include adding sound-absorbing cotton, reducing fan speed, etc., which cannot achieve a good balance between performance improvement and noise reduction, and the noise reduction effect is poor. Summary of the Invention

[0005] The object of the present invention is to provide a noise reduction structure, a fan and a gas water heater to solve the technical problem of poor noise reduction effect in the prior art.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] A noise reduction structure, comprising:

[0008] The main body comprises a gas channel and a noise reduction cavity, wherein the gas channel has an air inlet and an air outlet connected to each other, the noise reduction cavity is arranged around the gas channel, the gas channel is connected to the noise reduction cavity, and a tortuous sound propagation channel is formed inside the noise reduction cavity;

[0009] An active noise reduction module is disposed in the noise reduction cavity, and the active noise reduction module can emit corresponding sound waves according to the sound wave information in the noise reduction cavity.

[0010] As a preferred solution of a noise reduction structure, the noise reduction cavity includes a plurality of sub-cavities arranged in layers, each of the sub-cavities has a sound inlet, the gas channel is connected to the noise reduction cavity through the sound inlet, adjacent sub-cavities are connected through the sound inlet, and the sound inlets of adjacent sub-cavities are staggered.

[0011] As a preferred solution of the noise reduction structure, each of the sub-cavities has a plurality of the sound inlets, and the plurality of the sound inlets of each sub-cavity are evenly spaced and arranged around the gas channel.

[0012] As a preferred solution of the noise reduction structure, the main body includes an upper cover body, a lower cover body and a plurality of partitions arranged between the upper cover body and the lower cover body. The plurality of partitions are arranged in layers, and the sub-cavity is formed between adjacent partitions. The sound inlet is opened on the partition.

[0013] As a preferred solution of the noise reduction structure, the plurality of partitions include an inner partition located in the innermost layer and a plurality of outer partitions arranged around the periphery of the inner partition, and the hardness of the inner partition is greater than that of the outer partition.

[0014] As a preferred solution of the noise reduction structure, the main body is cylindrical and the sub-cavity is annular.

[0015] As a preferred solution of the noise reduction structure, two active noise reduction modules are provided, and the two active noise reduction modules are located in different sub-cavities.

[0016] As a preferred solution of a noise reduction structure, the active noise reduction module includes:

[0017] Controller;

[0018] a noise collector, communicatively connected to the controller, capable of collecting sound wave information in the noise reduction chamber and sending the sound wave information to the controller;

[0019] The speaker is in communication with the controller, and the controller controls the speaker to emit corresponding sound waves according to the sound wave information.

[0020] A fan comprises a housing and the noise reduction structure as described above, wherein the housing has an air inlet, and the air outlet is connected to the air inlet.

[0021] A gas water heater comprises the fan as described above.

[0022] Beneficial effects of the present invention:

[0023] The noise reduction structure proposed by the present invention has the following characteristics: when air flows through the gas channel, sound waves enter the noise reduction chamber from the gas channel during the process of air flow entering the air inlet and flowing out of the air outlet. Due to the tortuous sound propagation channel formed inside the noise reduction chamber, the energy of the sound waves can be consumed, thereby achieving a better noise reduction effect; the active noise reduction module is arranged in the noise reduction chamber. The active noise reduction module can emit corresponding sound waves based on the sound wave information in the noise reduction chamber, so that the intensity of the sound waves is weakened after superposition, thereby achieving active noise reduction. The noise reduction structure proposed by the present invention combines passive noise reduction with active noise reduction to achieve a dual composite noise reduction effect, which can better reduce low-frequency noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1is a structural diagram of a noise reduction structure provided by an embodiment of the present invention;

[0025] Figure 2 This is a schematic structural diagram of the noise reduction structure provided by an embodiment of the present invention after omitting the upper cover;

[0026] Figure 3 is a cross-sectional view of a noise reduction structure provided by an embodiment of the present invention.

[0027] In the picture:

[0028] 10. Main body; 11. Upper cover; 12. Lower cover; 13. Partition; 101. Air channel; 102. Noise reduction chamber; 1021. Sub-chamber; 1022. Sound inlet;

[0029] 20. Active noise reduction module. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0031] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0034] See also Figures 1 to 3The embodiment of the present invention provides a noise reduction structure, including a body 10 and an active noise reduction module 20. By combining passive noise reduction with active noise reduction, a double composite noise reduction effect is achieved, which can better reduce low-frequency noise.

[0035] The main body 10 has a gas channel 101. The gas channel 101 has an air inlet and an air outlet that are connected. The gas channel 101 runs through the main body 10, with the air inlet located at one end of the main body 10 and the air outlet located at the other end of the main body 10. When air flows through the gas channel 101, it enters at the air inlet and flows out at the air outlet.

[0036] The main body 10 has a noise reduction chamber 102. This chamber surrounds the gas channel 101, connecting the gas channel 101 and the chamber 102. This chamber 102 forms a tortuous sound propagation path within the chamber 102. When air flows through the gas channel 101, sound waves enter the chamber 102 from the gas channel 101. This tortuous sound propagation path dissipates the energy of the sound waves, achieving a superior noise reduction effect.

[0037] The active noise reduction module 20 is disposed in the noise reduction chamber 102 and can emit corresponding sound waves based on the sound wave information in the noise reduction chamber 102. The sound waves emitted by the active noise reduction module 20 are superimposed on the sound waves in the noise reduction chamber 102, and the intensity is weakened after the superposition, thereby achieving active noise reduction.

[0038] The tortuous sound propagation channel has at least one inflection point. The more inflection points there are, the more energy of the sound waves can be consumed, and the better the noise reduction effect. Optionally, the sound propagation channel is a maze-like channel.

[0039] It should be noted that the airflow does not enter the noise reduction chamber 102. Instead, it flows from the air inlet to the air outlet of the gas channel 101. Airflow from the air inlet to the air outlet is caused by negative pressure at or downstream of the air outlet. Therefore, when the airflow passes through the gas channel 101, the air pressure at the air outlet is low, preventing the airflow from entering the sound propagation channel and instead flowing directly to the air outlet. Therefore, the airflow energy is not lost, and noise reduction is achieved without affecting the wind speed in the gas channel 101.

[0040] In this embodiment, the noise reduction chamber 102 includes a plurality of sub-cavities 1021 arranged in layers, each sub-cavity 1021 has a sound inlet 1022, the gas channel 101 is connected to the noise reduction chamber 102 through the sound inlet 1022, and adjacent sub-cavities 1021 are connected through the sound inlet 1022. The sound inlets 1022 of adjacent sub-cavities 1021 are staggered to extend the transmission path of the sound waves, thereby increasing the energy consumption of the sound waves in the noise reduction chamber 102, and further improving the noise reduction effect.

[0041] It can be seen that the gas channel 101 is connected to the innermost sub-cavity 1021, the sound inlet 1022 of each sub-cavity 1021 is located on the inner side of the sub-cavity 1021, and the outer wall of the outermost sub-cavity 1021 is closed.

[0042] Since the sound inlets 1022 of adjacent sub-cavities 1021 are staggered, a tortuous sound propagation channel can be formed. When sound waves enter the sub-cavity 1021, the layers of sub-cavities 1021 gradually muffle the sound waves, thereby achieving a good noise reduction effect.

[0043] In this embodiment, each sub-cavity 1021 has a plurality of sound inlets 1022 , and the plurality of sound inlets 1022 of each sub-cavity 1021 are evenly spaced around the gas channel 101 , so that sound waves can evenly enter each sub-cavity 1021 .

[0044] Specifically, the main body 10 includes an upper cover 11, a lower cover 12 and a plurality of partitions 13 arranged between the upper cover 11 and the lower cover 12. The plurality of partitions 13 are arranged in layers, and a sub-cavity 1021 is formed between adjacent partitions 13. The sound inlet 1022 is opened on the partition 13.

[0045] The partition 13 and the upper cover 11 can be bonded to each other to achieve a sealing effect. The partition 13 and the lower cover 12 can be bonded to each other to achieve a sealing effect.

[0046] The partition plate 13 is made of rubber, which has low cost and has a vibration reduction effect.

[0047] The multiple baffles 13 include an inner baffle located in the innermost layer and several outer baffles arranged around the inner baffle. The inner baffles are harder than the outer baffles. In essence, the inner baffles are made of hard rubber, while the outer baffles are made of soft rubber. The inner baffles provide support, while the outer baffles provide vibration damping.

[0048] In this embodiment, there are four sub-cavities 1021 and five layers of partitions 13. The partitions 13 located on the outermost layer are connected to the upper cover 11 and the lower cover 12 to seal the noise reduction cavity 102.

[0049] In this embodiment, the main body 10 is cylindrical, and the sub-cavity 1021 is annular. Alternatively, the main body 10 may be in a cube shape.

[0050] Here, there is no limitation on the shape of the sound inlet 1022. In this embodiment, the sound inlet 1022 extends along the axial direction of the body 10. The radial width of each sub-cavity 1021 can be set as needed, and the widths of the sub-cavities 1021 can be unequal.

[0051] The active noise reduction module 20 includes a controller, a noise collector, and a speaker. The noise collector is in communication with the controller, capable of collecting sound wave information within the noise reduction chamber 102 and transmitting the sound wave information to the controller. The speaker is also in communication with the controller, and the controller uses the sound wave information to control the speaker to emit corresponding sound waves. The sound waves emitted by the speaker and the sound waves within the noise reduction chamber 102 are superimposed on each other, resulting in a lower intensity.

[0052] The number of active noise reduction modules 20 can be set as needed. In this embodiment, two active noise reduction modules 20 are provided, and the two active noise reduction modules 20 are located in different sub-cavities 1021. One active noise reduction module 20 is located in the outermost sub-cavity 1021, and the other active noise reduction module 20 is located in the sub-cavity 1021 adjacent to the outermost sub-cavity 1021.

[0053] The position of the active noise reduction module 20 can be adjusted as needed. In this embodiment, two active noise reduction modules 20 are distributed on both sides of the gas channel 101, so that the two active noise reduction modules 20 are as far apart as possible to prevent mutual interference between sound waves. Specifically, the two active noise reduction modules 20 are located in the radial direction of the gas channel 101.

[0054] An embodiment of the present invention further provides a blower comprising a housing and the aforementioned noise reduction structure. The housing has an air inlet, and an air outlet communicates with the air inlet. When the blower is operating, external airflow enters the gas channel 101 through the air inlet and enters the blower through the air outlet. Sound waves are reduced in the noise reduction chamber 102, thereby reducing the noise of the airflow entering the blower and thus lowering the noise of the blower.

[0055] Of course, the above-mentioned noise reduction structure can be used not only for the air inlet of a fan, but also for the air inlet of any equipment, without limitation here.

[0056] The embodiment of the present invention further provides a gas water heater including the above-mentioned fan, which can reduce the noise of the fan and ensure the performance without changing the rotation speed of the fan.

[0057] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction structure, characterized in that: include: A main body (10) has a gas channel (101) and a noise reduction chamber (102), wherein the gas channel (101) has an air inlet and an air outlet that are connected to each other, the gas channel (101) runs through the main body (10), the air inlet is located at one end of the main body (10), the air outlet is located at the other end of the main body (10), and the air outlet can be connected to the air inlet of the fan, the noise reduction chamber (102) is arranged around the gas channel (101), the gas channel (101) is connected to the noise reduction chamber (102), and a tortuous sound propagation channel is formed inside the noise reduction chamber (102); An active noise reduction module (20) is arranged in the noise reduction chamber (102), and the active noise reduction module (20) can emit corresponding sound waves according to the sound wave information in the noise reduction chamber (102).

2. The noise reduction structure according to claim 1, characterized in that: The noise reduction chamber (102) comprises a plurality of sub-cavities (1021) arranged in a ring-like manner, each of the sub-cavities (1021) having a sound inlet (1022), the gas channel (101) being connected to the noise reduction chamber (102) via the sound inlet (1022), adjacent sub-cavities (1021) being connected via the sound inlet (1022), and the sound inlets (1022) of adjacent sub-cavities (1021) being staggered.

3. The noise reduction structure according to claim 2, characterized in that: Each of the sub-cavities (1021) has a plurality of the sound inlets (1022), and the plurality of the sound inlets (1022) of each of the sub-cavities (1021) are evenly spaced and arranged around the gas channel (101).

4. The noise reduction structure according to claim 2, characterized in that: The main body (10) includes an upper cover (11), a lower cover (12), and a plurality of partitions (13) arranged between the upper cover (11) and the lower cover (12), wherein the plurality of partitions (13) are arranged in a ring-like manner, and the sub-cavity (1021) is formed between adjacent partitions (13), and the sound inlet (1022) is opened on the partition (13).

5. The noise reduction structure according to claim 4, characterized in that: The plurality of partitions (13) include an inner partition located in the innermost layer and a plurality of outer partitions arranged around the periphery of the inner partition, and the hardness of the inner partition is greater than that of the outer partition.

6. The noise reduction structure according to claim 2, characterized in that: The main body (10) is cylindrical, and the sub-cavity (1021) is annular.

7. The noise reduction structure according to claim 2, characterized in that: Two active noise reduction modules (20) are provided, and the two active noise reduction modules (20) are located in different sub-cavities (1021).

8. The noise reduction structure according to claim 1, characterized in that: The active noise reduction module (20) comprises: Controller; a noise collector, communicatively connected to the controller, the noise collector being capable of collecting sound wave information in the noise reduction chamber (102) and sending the sound wave information to the controller; The speaker is in communication with the controller, and the controller controls the speaker to emit corresponding sound waves according to the sound wave information.

9. A fan, characterized in that: The noise reduction device comprises a housing and the noise reduction structure according to any one of claims 1 to 8, wherein the housing has an air inlet, and the air outlet is connected to the air inlet.

10. A gas water heater, characterized in that: Including the fan described in claim 9.

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